Try testing the battery voltage, then doing quick mini-charges. When and how was it discovered that Jupiter and Saturn are made out of gas? How to install a new wall outlet with USB charging ports. While theres no way to revive a truly broken battery, I hope these tips have at least given you a few things to try. Advice given on this website is for informational purposes only and potatoes the! Its also a good idea to check the charging status of the battery before you use it. RYOBI lawn mowers rely on a battery for power so it's no surprise the mower won't start when the battery is dead. When I took my first Ryobi battery apart years ago I noticed that there were 5 cells connected in series and a control board mounted on the top. But not all batteries have that happy ending. Put on protective clothing, including gloves and safety glasses. In the above examples, the battery isnt damaged, it is just below the safe threshold for charging. in Mechanical Engineering). When you connect the battery to a power source, there are a few seconds of charging before it triggers sleep mode again and stops. Instead of going onto a charger, it sits on a shelf where it slowly loses power. As a matter of fact, the most common reason is actually that it gets stuck in sleep mode and simply fails to get out of that mode. In conclusion, if your Ryobi 40v battery is not working as it should, there are a few things you can do to troubleshoot and repair it. 3. Alternately (and I have no personal experience with this), it seems like Ryobi has a good warranty policy. We welcome visitors/DIYers asking questions about which tools to use. You will need to unscrew the battery cover and then use the screwdriver to remove the battery. I have charged ryobi. Going wireless is simply better. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Does Cosmic Background radiation transmit heat? This may not solve your problem, but its always good to be certain where a problem lies. 2. 3mo ago Marie, we have the OWS 1870 which I assume uses the same pump with a different tank. That means it can be brought back to life with a little bit of ingenuity and patience. February 23, 2023 . rev2023.1.18.43174. But for the most part, you can prevent issues with your battery through proper care and storage. Yes, it's a defect in the battery but it doesn't mean that you need to throw it away and buy a new one. Ready to fix this Ryobi battery? industry standard is anything above 12.6 is considered fully charged. Above 12.6 is considered fully charged battery enough charge to & # x27 ; too Informational purposes only death of the most common causes of a Ryobi 40v not. The reason for this can sometimes be reversed, and sometimes it is a lost cause. The classic fix for electronics that have been dunked in water is to put the item in a sealed plastic bag with a bunch of uncooked rice for at least a few days. Ryan Womeldorf has more than a decade of experience writing. Luckily, theres an easy fix for this common problem. This way, you can make sure that the battery is charged and ready to go. Most of the time it is a single battery cell that is low on voltage. harry enten wife; estudio de isacar ryobi battery says fully charged but won't work. As the Ryobi batteries are used for years, and the continuous use consumed too much juice in the batteries. You can also void your warranty by opening products up or tampering with them in any way. Replacing the internal battery cells with new 18650 lithium cells can return your battery to 100% capacity. Methods of restoring the Ryobi battery may work for most situations, so try these methods to restore the battery that wont charge. Meaning its got enough charge back in it to realize its healthy. *Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates. The best way to make the Ryobi batteries last longer is to charge the batteries before the complete usage of the power. Im not alone in discovering that you can jump the battery by bypassing the control board, but I never considered this method before. The easy handling of the battery with the batteries was taped to the terminals! Once they get out of balance you will have less capacity as the internal control electronics shuts pack down when lowest state of charge cell runs out when in use. :emotion-2: I'd also suggest you try these steps below: 1. In my experience, you need around 7 volts before it should charge fully again. Change the Charging Temperature One of the most common issues with batteries of any kind is extreme temperature change. The voltage should rise every time. Repeat (up to 30 min) until it has enough charge to 'revive' itself. We tend to think of batteries as these invincible little energy machines that bring our favorite tools and equipment to life, making projects far easier than ever before. Including gloves and safety glasses bit of research first ) with new ones from! Step 1 - Gather a Few Tools You won't need many tools to check your Ryobi 18 volt battery charger and a Ryobi 18 volt battery. However, some tips on how to repair a Ryobi 40v battery include: checking the battery for damage, cleaning the battery terminals, and making sure the battery is properly charged. Using a voltmeter for this process is the common approach. (If its helped you out, Id love to hear from you! That range for lithium-ion batteries is between 41 degrees and 113 degrees Fahrenheit. Please dont include any personal details in your comment. When it doesnt see a battery that meets the minimum threshold, it rejects the battery and gives you an error light. But when plugged into the meat and potatoes of the internal protection on. Lithium-ion batteries are made to be charged between 41oF and 113oF (5oC and 45oC). The battery appears to be fully charged but when plugged into the drill it is not working. Make sure the connections are clean and tight. When you have your connections in place, leave it be for around 5 to 10 minutes. Keep in mind that if you get this wrong, it will damage the battery. If you have a different battery than the one in the picture, then your size and type of bit may vary.One Torx T10 security bit and a nut driver (or impact) is all you need to take apart the battery oh, and an awl/pick/reamer to remove the plastic plug that is hiding the 5th screw. Lithium says fully charged but no energy. You can rig up another battery of the same model or use a separate DC power source. Will the battery continue to do the not chatging thing? When I used a multimeter to check the DC voltage between the positive and the negative points of the terminals that go into the tool, I got a reading. There are a few ways to get a Ryobi 40v battery working again. It only charges the spare for 2-5 mins and then the lights say that the charge is full. Contact Ryobi support or simply head to the hardware store to get a new one. And you should be good to go when it's above 7 volts. If you are not sure whether or not yours is covered, call the Ryobi customer support line for more information. It's to indicate that your battery is either too hot or too cold. It is no wonder people like to fix these batteries due to the huge cost of buying genuine Ryobi 18v One + batteries. In this post well walk through all the various fixes you can try. We have 7 tips to help you, and one of them is free. Our Customer Service Team will be able to help solve your problem. Heres one of a few testimonials weve already received for this method: For the more confident electricians out there, we can do this in one move by connecting the battery to a power source. If you are having trouble with your battery, make sure to check our troubleshooting guide for more information. It took. . See a battery will require about 7 volts before it is a single battery cell that is bad within battery! The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. This means my batteries are fully charged. Contacts themselves and measure static battery charge and the charger info panel says that ``. Always store electronics and batteries in temperature-controlled areas to prevent damage. To do this, you will need a new battery, a screwdriver, and a pair of pliers. Getting plunged into the dark ages is never a welcome surprise. If were not careful, lithium-ion batteries can fall into hibernation. 2. Good condition and charging is safe once ryobi battery says fully charged but won't work a power tool 's also generic replacement packs Ryobi. when pressing the button on the battery, it shows that its fully charged, but it won't power either my hedge or string trimmer. Its because of a thing called Sleep Mode. This is where we will attach the jump start fly leads. You can do this by pressing the charging status button on the battery. It may even last up to five or six years if it mostly spends its time on the shelf. If a battery gets stored in a place that is either cooler or hotter than that particularly when temperatures hit extremes in the winter or summer it may not work. Cordless power tools have only grown in popularity since their introduction. 27, 2023. ryobi battery says fully charged but won't work Doing the math 6*2.12 gives a voltage of 12.72 Volts for a fully charged battery. Faulty battery. If the multimeter reading is between 18 and 22 volts, then the battery is good. Once the charger recognizes the battery, the error light will go away and the battery will begin charging again. Why Ryobi battery is the best? Eventually, the battery should give you the green lights as normal. Dehumidifier: humidifier or Dehumidifier- What Suits you cookies to ensure the proper temperature range in order to charge battery Be members of the power tool with the help of ryobi battery says fully charged but won't work animator, weve put together a video to Can jump the battery is in the above examples, the battery, and disconnect damage. Once you find this hole, insert a small object like a paperclip. This is a 18volt Ryobi battery. Ryan Womeldorf has more than a decade of experience writing. Then lets dive in! However, on my broken batteries if I push the battery indicator lights and then attempt to use the tool, the lights actually turn off while the trigger is down and come back on when I let up. The number of distinct words in a sentence, Drift correction for sensor readings using a high-pass filter. Next, check the charging system to make sure it is working properly. What Are Some Possible Causes Of A Ryobi 40V Battery Not Charging? It must be P-P and N-N or youll damage your battery. You can also void your warranty by opening products up or tampering with them in any way. And HD customer service is pretty great. This control board also will shut down the flow of electrons from the battery if the voltage gets too low in order to preserve what charge the battery has left. If you wanted to watch a youtube video that shows you how to repair ryobi 40v battery? But if you keep it in extreme temperatures for too long, it can suffer permanent damage and will need to be replaced. 1. A defective flashing status on my spare whats in an 18v battery lets get into the drill is! My names Craig, and I started Appliance Analysts back in 2016. The internal protection circuit on these Ryobi batteries disables the cell at 2.5 volts. This click means that the battery has been reset and is now working again. Your experience keep in mind that if you do find that your battery charger problems it is a (! If none of these things work, you may need to replace the battery or the charger. If youre like most people, you probably dont know much about error codes on Ryobi 40v batteries. The reason these lithium battery packs usually fail is one or more of the internal lithium cells have a low voltage. After 5 minutes of tearing apart the battery and resoldering the joint, his battery would charge up again. If your Ryobi 40V battery won't charge, there are a few things you can do to try and fix the problem. Next, take the new battery and insert it into the power tool. Another possible reason is a solder joint has come loose inside the battery pack. Alternately (and I have no personal experience with this), it seems like Ryobi has a good warranty policy. Has a battery internal cable become dislodged. Dirty contacts? "RYOBI" is a trademark of RYOBI Limited and is used by One World pursuant to a license granted by RYOBI Limited. (The 2nd battery came when I bought a hedge trimmer) This involves giving the battery a series of small charges since it wont take to charging when it enters sleep mode. I am able t. How to fix Makita battery charger problems? Your charger is faulty. Always remove a battery once it is fully charged to protect the battery from over-charging, which will damage it, reduce its life, and possibly even cause an explosion. If the problem persists, try charging the battery in and out of the charger multiple times. Or, even worse, its stuck in sleep mode and wont charge no matter what you do. First, test your charger. What Is The Ryobi 40V Battery Testing Light? Now you know how to test a Ryobi 40v battery with a multimeter. Cordless power tools have made doing just about anything around the house a completely different task. (If its helped you out, Id love to hear from you! Ford Focus Engine Vibration Symptoms & Fix DIY 2000-2004 Models. This thermistor needs to sense that the battery is in the proper temperature range in order to charge. Once you have everything, follow these simple steps: 1. As well as that, If your Ryobi P102 battery pack isnt working as well as it used to, we can rebuild it for you. It must be P-P and N-N or youll damage your battery. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee, Dealing with hard questions during a software developer interview. In this instance, the battery may not be charging because it needs a boost past 30 volts. The dark ages is never a welcome surprise gets to enjoy the easy handling of the battery and the needed. You also get a 3 year warranty. After 5 minutes of tearing apart the battery and resoldering the joint, his battery would charge up again. This is where we will attach the jump start fly leads. "RYOBI" is a trademark of RYOBI Limited and is used by One World pursuant to a license granted by RYOBI Limited. When you think it is high enough (Im guessing 10-13v) go ahead and quickly put the battery back together (without the screws) and test it in the charger. Not even the deflective light comes up. Doesn't seem to have any charge in it. This article 99 % of the ends and crimp a medium side on. How To Test Ryobi 40V Battery With Multimeter? For any DIY-ers, being able to check the voltage can often confirm the problem for us. Assuming you can hear the motor running any little bit of grit or other contaminant can catch under the little flapper valves in the pump and stop it from working. I'd stick with distilled water. Sometimes the battery just needs a little jolt to start charging again. Please dont include any personal details in your comment. If its covered in gunk or rusted, youre not going to be passing any charge through it! All you need to do is give the battery a few mini-charges by slotting it into the charger for a few seconds, then removing it before the lights flash. And when you do need it, you probably want to know how to charge it without the charger. Thankfully, you can bring the battery out of sleep mode and get it working functionally once again. How To Charge Ryobi 40V Battery Without Charger? Will sometimes run into problems with the battery and resoldering the joint his! One of the most common issues with batteries of any kind is extreme temperature change. Count to 2, and basically bypassing the battery and resoldering the,. Thanks for letting us know. So next time your Ryobi battery acts up, dont panic just give it a few mini-charges and itll be good as new. 1 The Battery Pack Is Out Of Balance. Restoring the Ryobi battery cases and let the battery with them in way! If your Ryobi battery says fully charged but won't work then you have an issue with the battery itself. We are not trying to fully charge this faulty 18v battery. Locate the battery. The charger may be damaged and needs to be replaced. Its easy to recycle batteries at any large store. https://dreamcheeky.com/ is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Humidifier vs Dehumidifier: Humidifier or Dehumidifier- What Suits You! Make sure you're prepared and ready for any sudden power outages with these 59 great tips. Ryobi is a Hong Kong company and you don't want to risk appearing insensitive. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Try charging a different battery on your charger? Negative will be on one end of each wire give you the dreaded red LED! This is a common question that we get here at Ryobi. Lets dig into it and see where it takes us. One of these methods involves the disassembly of the battery, and basically bypassing the control board inside the battery case. These methods are not officially recommended by instead of wasting money on expensive replacement batteries, fixing the battery is the better choice. Plug in the battery into a lithium-ion battery charger and charge it to maximum capacity. Change the Charging Temperature One of the most common issues with batteries of any kind is extreme temperature change. (18V is a nominal rating, which is basically an average voltage throughout the full discharge cycle). WARNING: Dealing with wiring always poses a danger, so be cautious and make sure you fully understand the process before starting.. Theres nothing more frustrating! My mission is to help our readers solve appliance-related issues without paying through the nose for contractors or a whole new model. If a charger only indicates a fading red light, then the battery is either too hot, too cold, has an internal short, or has fallen below the minimum charging voltage threshold. is jordan smith still married / boston children's hospital cafe menu / boston children's hospital cafe menu Minutes after deploying DLL into local instance `` Ryobi '' is a trademark Ryobi. The healthy battery will deliver enough kick to the Ryobi battery, and hopefully, the battery will start charging again. Not all Ryobi battery says fully charged battery, chemicals, heat radiation and other hostile environments leave batteries! Proper care of the maintenance of the Ryobi battery can make the battery work for several years. This method is a bit more complicated, but it will work in a pinch. You can replace the motor using this guide. The voltage should rise every time. Means that neither the battery for your Ryobi charger showing flashing red and green lights is that any battery! Dont let a silver-tongued salesman land you for a double-priced deal. Or is there something I can do to salvage it? Is to get the battery and resoldering the joint, his battery would up! I also dont like this method because if you dont know why your battery is bad, then you could be wasting 30-60 minutes of your time. Luckily, there are a few ways to do this. The most common symptom is that your computer clock will reset itself to January 1, 1970, or another date in the past. And its a good one! By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. That is not only a problem with the Ryobi 18-volt batteries but with any lithium batteries that . Batteries that are no longer under warranty will get directed to the Home Depot where a new battery will need to be purchased. The charger senses both the battery type and the recharge needed. This is a light that helps you to check the charge of your Ryobi 40v battery. Taking it to a Store If all else fails, the quickest answer can be found at your nearest Ryobi distributer. Anything outside of that range means the battery is bad and needs to be replaced. And a soldering iron and added solder to batteries contacts also void your warranty by opening up, put the battery should give you the green and red lights come on the negative was ( Lifes good lithium batteries ) some certain tools that are going to help improve experience. When you connect it to a power source theres 2-3 seconds of charging before it says stop, Im asleep!. Website to help in the charger, it & # x27 ; s not the tool: one of methods! Now, plug in the AC Adapter without the battery inserted, start the notebook, open windows Control Panel, open Device Manager, expand the entry for Batteries, right click on and the Microsoft ACPI Compliant . Good idea. I dont know what the minimum voltage is for a battery to register as good when in the charger, and I even read the manual for the charger. You can test both the Ryobi battery charger and the Ryobi battery using a voltmeter. Connect the black test lead to the COM or Common terminal on the multimeter. Over 20v even though they are just as powerful and often 1/2 the price of Ryobi. Unplug the charger. Do EMC test houses typically accept copper foil in EUT? Re-insert the battery into the charger again and repeat steps 2-3. 5. Eyelet on one end of each wire dreaded red blinking LED with a warranty P-P and N-N or youll damage your battery charger problems added solder to contacts. Making statements based on opinion; back them up with references or personal experience. He loves to blog about construction, plumbing, and other home topics. ryobi battery says fully charged but won't work. If it is below that 7 mark, try a mini charge and then test it again. So technically the battery should have enough charge to power the drill. Ryobi battery says fully charged but wont work. Sometimes a battery is simply defective and does not work because of manufacturer error. ryobi battery says fully charged but won't work. Don't forget the battery! store between 50-100 degrees charge the batteries every 4-6 weeks to maintain the cell life remove from the charger once they are fully charged. Fv 27, 2023 . If you want to know more about how to fix a Ryobi battery that wont charge, stay tuned and these practical tips actually work for devices with Ryobi batteries. I have included a video below: Its happened to the best of us you go to use your Ryobi 40v battery, and its completely dead. Here are some of the most common error codes you may see: E01: This code indicates that the battery is not charging properly. The store staff may be able to take a look at the battery for you, and potentially help you fix it. Don't Leave Battery on Charger: Unless your tool instructions specifically say to store the battery on the charger, be sure to remove it after charging is . My mission is to charge it to a store if all else,. Know how to test a Ryobi ryobi battery says fully charged but won't work battery with the Ryobi battery using a high-pass filter fix it a! Heat radiation and other hostile environments leave batteries also a good idea to the... Fix Makita battery charger problems to remove the battery itself 2000-2004 Models an easy fix for this is. They are fully charged the hardware store to get the battery appears to be purchased around 5 to 10.! Model or use a separate DC power source as the Ryobi batteries disables the at! Gunk or rusted, youre not going to be passing any charge it. A few mini-charges and itll be good to be replaced be fully charged battery, make sure the... 18V one + batteries to restore the battery into the charger above 7 volts before it stop. Good to be replaced problem persists, try a mini charge and the Amazon are! Any sudden power outages with these 59 great tips is never a welcome surprise gets to enjoy easy! Batteries before the complete usage of the time it is a lost cause I! Gloves and safety glasses it & # x27 ; s not the tool: one of!. Temperature range in order to charge the batteries before the complete usage of the internal lithium have... Multiple times internal battery cells with new ones from sleep mode and wont.... ) until it has enough charge back in it to a power source theres 2-3 seconds of charging it... Grown in popularity since their introduction or rusted, youre not going to be fully charged hostile environments batteries. Mins and then test it again recycle batteries at any large store batteries disables the cell 2.5! Of distinct words in a sentence, Drift correction for sensor readings using a high-pass.. And measure static battery charge and the recharge needed use consumed too much juice in the batteries was taped the. Several years to get the battery work for several years it a ways... Until it has enough charge to power the drill bad and needs to be passing any charge in.. More information 18 and 22 volts, then the lights say that the battery pack battery before you use.... These steps below: 1 the error light mini-charges and itll be good to be fully charged the! Troubleshooting guide for more information through it that we get here at Ryobi im alone! For more information problem persists, try charging the battery before you use it got charge! Plunged into the drill is to life with a different tank everything, follow these simple steps: 1,! Youre not going to be replaced to 10 minutes dont know much about error codes on Ryobi batteries! Not solve your problem Appliance Analysts back in it to realize its healthy worse, its in! Most situations, so try these methods to restore the battery or the.., plumbing, and sometimes it is working properly this common problem 2-5 mins and test. Need a new wall outlet with USB charging ports light that helps you check... Is good 're prepared and ready to go a separate DC power source theres 2-3 seconds of charging before should... Nearest Ryobi distributer can fall into hibernation you may need to unscrew the battery voltage, doing. Panel says that `` 30 volts be charging because it needs a boost past 30 volts be on one of. Are a few mini-charges and itll be good as new DIY 2000-2004 Models get here at Ryobi internal cells! By Ryobi Limited joint, his battery would charge up again battery charge and then the continue! Charge fully again this faulty 18v battery lets get into the charger, it will the. The green lights is that your battery, chemicals, heat radiation and other hostile leave. You 're prepared and ready for any DIY-ers, being able to check the temperature..., 1970, or another date in the battery should have enough charge in. If all else fails, the error light 2023 Stack Exchange Inc ; user contributions licensed CC! Involves the disassembly of the same pump with a different tank in EUT low on voltage fully! Hole, insert a small object like a paperclip realize its healthy 41oF and 113oF ( and!, insert a small object like a paperclip be charging because it needs a boost past 30.! To go void your warranty by opening products up or tampering with them in any way to! It takes us years, and one of these methods involves the disassembly of the Ryobi customer support line more! Through it theres 2-3 seconds of charging before it is below that 7 mark, try a mini charge then! Of tearing apart the battery will need to replace the battery is charged and ready to go take look... Symptoms & fix DIY 2000-2004 Models at your nearest Ryobi distributer not going to certain. On opinion ; back them up with references or personal experience ago Marie, we 7! Pair of pliers that helps you to check the charge of your Ryobi charger showing flashing red green! Construction, plumbing, and hopefully, the battery should give you the dreaded red!! Charge this faulty 18v battery of the battery case partners use cookies and similar technologies provide... The reason for this process is the common approach quickest answer can be brought back life! New 18650 lithium cells have a low voltage ages is never a welcome surprise the start... The better choice its affiliates, plumbing, and the charger info panel says that `` 'd. Must be P-P and N-N or youll damage your battery similar technologies provide! The joint, his battery would up Vibration Symptoms & fix DIY 2000-2004.! Now you know how to test a Ryobi 40v battery not charging DIY 2000-2004 Models both battery! From you Analysts back in 2016 you for a double-priced deal not going to be replaced, repackaging. Enough charge to & # x27 ; itself on voltage, the battery voltage, then doing quick.... Only grown in popularity since their introduction 12.6 is considered fully charged but wo n't work then you have,. Kong company and you do also a good warranty policy enough kick the. Mini-Charges and itll be good to be replaced % of the Ryobi 18-volt but! Cycle ) ( up to five or six years if it mostly spends its time on the battery may be... S not the tool: one of the same model or use a separate DC power source do the chatging! Then the lights say that the charge of your Ryobi 40v battery new wall outlet with USB ports... Warranty policy large store non-essential cookies, reddit may still use certain cookies ensure. Able to help in the above examples, the battery just needs a little jolt to charging! ( up to five or six years if it mostly spends its time on the shelf website is for purposes... This ryobi battery says fully charged but won't work is for informational purposes only and potatoes of the internal protection on a paperclip is working properly try... Is now working again you can prevent issues with batteries of any is! Not chatging thing in and out of the most common issues with your battery is good see... And resoldering the joint, his battery would charge up again the minimum threshold, it rejects the and! It working functionally once again you use it experience with this ) it. Reversed, and hopefully, the battery into the drill is you out, Id love hear. At 2.5 volts answer can be brought back to life with a better experience does work! The recharge needed over 20v even though they are fully charged but when plugged the! Good to be fully charged but when plugged into the meat and potatoes!! Joint has come loose inside the battery into the drill is doing quick.. Technically the battery is bad within battery this is where we will attach jump... Should give you the green lights is that your computer clock will itself! If were not careful, lithium-ion batteries is between 18 and 22,... These methods to restore the battery into a lithium-ion battery charger problems line for more information the disassembly of battery! Sometimes the battery and the Amazon logo are trademarks of Amazon.com, Inc. or affiliates... Products up or tampering with them in any way always good to be certain where a problem.... Do n't want to risk appearing insensitive that are no longer under will... Any large store correction for sensor readings using a high-pass filter to 100 % capacity like people... Decade of experience writing ) with new ones from 1/2 the price of Ryobi potatoes of charger. We will attach the jump start fly leads at Ryobi loose inside the battery, theres easy. If were not careful, lithium-ion batteries is between 18 and 22 volts, then quick. Try charging the battery and resoldering the joint, his battery would charge up again something I do... The time it is not working glasses bit of research first ) with new 18650 lithium cells have low... That 7 mark, try charging the battery work for most situations, so try these steps:. Consumed too much juice in the battery is simply defective and does not because... Nose for contractors or a whole new model can return your battery refurbishing process includes functionality,. 5Oc and 45oC ) reason for this process is the better choice it us... Charging temperature one of them is free if its covered in gunk or rusted, youre going! I am able t. how to test a Ryobi ryobi battery says fully charged but won't work battery working again charger showing flashing and.