This wikiHow teaches you different ways to fix your phone's battery if it's no longer working at all. I easily revived 3 dead AA Ni-MH batteries. Another method – How to recondition Lithium Ion Batteries Another way of doing this is to use a *USB cable this needs to be a cable you don’t use, Since you are going to cut an end off of it. I dont know about other batteries.. How to Revive Old Lead Acid Batteries: If you are like me you probably have old lead acid batteries sitting somewhere probably dischargedIf you dont use lead acid battery always charge it before and recharge it every 3 monts I ve tried this method on maintenance free lead acid, sealed le… Ones the battery is revived charge it until it is full. Here in the image you can see a dead Ni-MH battery. I have tried it myself.. Thank you so much for this Instructable! When discharging, the “battery acid” facilitates the flow of electrons, from the Pb plate to the PbO2 plate, generating an electric current, which can be used to start the engine or illuminate the headlights, for example. Then immediately check the battery voltage of the dead battery, if u see a reading above the 0 value then you can be sure that the battery is revived. You connected two batteries in parallel....to nothing. Find a USB cord you don't mind sacrificing and cut off the smaller end or B connector, exposing the positive (red) and negative (black) wires inside. http://www.gettyimages.com/license/200159628-004. You should find that the dead li-ion battery now has a bigger voltage reading and will accept a charge. Each 8AAA 9.6v 650mAh.Thank you paul1212. I charged it per your instructions, and the voltage ended up at 1.33V, and then my charger considered it still good. To recondition the battery and clean the cells, follow the chemical manufacturer's instructions and pour the chemicals into the cells. I thinks Stephen4872 explanation about metalic dendrite crystal might explain a lott- I thought these batteries were complete gone ! Nickel cadmium (NiCad) rechargeable Bosch cordless drill batteries are extremely popular. The reset process clears the microchip's memory and gives the chip the "all clear" to charge normally. If the red light is flashing, there isn't enough power to turn on. The charger current tries to push electrons onto the negative terminal of your battery to charge it but the electrons just take the easiest path through the jumper and nothing takes place in the battery. Also lithium ion batteries are very sensitive to overcharging. If the battery has no charge at all the charger will not work and the light stays red. So i had to search a lot to find a proper solution to revive the battery. Hopfully that breaks the short. All you need is another battery and 2 paper clips. http://www.gettyimages.com/license/185262273. Charge your batteries beforehand for at least 12 hours. Thanks! Weird, but it worked - thanks again. When a rechargeable battery is charged for the first time, it needs to be left on the charger until fully charged. This worked great for me with 2 cordless phone batteries and a couple of jumper wires. Question It makes no sense to me. Usually, a jump start, booster pack, or battery charger is all that’s necessary to revive the car battery and get the car back on the road, but the damage has already been done. Hopfully that breaks the short. Modern lithium ion batteries rarely short out in this way. I just revived 2 old batt packs. How to Revive a Dead Phone Battery. You need a new battery. Related Resources: DeWalt Battery Won't or Will Not Charge? If these vital components of a battery are damaged in any way, your old lead acid battery will never revive. Alternatively, place the battery inside a tightly sealed plastic bag that prevents it from getting wet. Most maintenance-free (read: replace on death) car batteries tend to last 4 to 7 years. Next we must take a similar battery of the same mAh which is fully charged.Then we have to connect the positive terminal of the fully charged battery to the positive of the dead battery and similarly connect the negative terminals. If your car battery won’t hold a charge, is completely dead or starts with a jump, but then won’t start again… This article is for you. It’s the accumulation of damage that leads to the untimely death of the car battery, at which point it simply will not start the car. I had resigned myself to bining the last three (which would have left me with an odd number of two different brands and capacities) but then I saw this and gave it a go. The short is caused by a metalic dendrite crystal. Leave the cell caps off during charging. Is there a solution ? My 1800 mAh Ni MH batteries are not retaining charge even after slow charging in 60 mAh charger. Just touch the black wire to the negative terminal (the one with the black wire going to it) and the white wire (or striped wire) to the positive terminal (the one with the red wire going to it). The remaining 3 batteries now charge and last as long as the others. What am I missing here? So let me tell you the steps through which i got them working again. Eventually, PbSO4 crystal formation spreads, leading to cracks and short circuits within the battery, rendering it useless. I connected it like you said and left on for about 20 seconds. I thought I'd have to throw out the battery because my charger wouldn't charge it. Thank you Paul1212 - you saved the day .. To ​prevent sulfation and failure, always recharge the battery immediately after use, make sure the vehicle charging system is functioning properly and put an unused car battery on a float charger to maintain full charge.​. Give us a call at 281-800-9209 or request a service online. This may assist in getting your battery kick started so it will charge again. However, after a while you may find your battery goes dead quickly, or is weak and, in some cases, it doesn't take or hold a charge … Put your cell phone battery on charge, ... until your phone won’t power up. If they overcharge they can catch fire . 5 years ago 5 years ago. If you are still having problem check weather you are using a full charge battery for reviving the dead one. If you don't see a battery icon or red light after you plug in your phone, the issue could be with your screen. If the battery is still dead try the step again, i had a problem with 1 battery which did not work for this step the first time, later after some 3 tries it worked and is good as new. How to revive dead DeWalt 20V batteries that won't charge. Step 2: Place the battery in the ice compartment of your fridge, and take it out after 3 days. Turn on the charger. Subscribe. 79. Charge your phone for at least 30 minutes before restarting. Is this really possible? by connecting a fully charged battery to the dead shorted battery you willl get very high current flow through the dendrite. This is great considering I have a "green thumb" and didn't want to throw these away! You may immediately assume that your chargeless laptop battery translates to a costly visit to a PC repair shop, but that’s not always the case. My battery was showing 1.2V, but my charger considered it bad. Hook up the good battery and deeply discharged AGM battery in parallel—positive to positive and negative to negative. The short is caused by a metalic dendrite crystal. I found 12 Nimh batteries that had been stored for rather a long time (at least 5 years) and only about half would charge in my 'intelligent' charger. This really works.. on Step 2. Unfortunately, even rechargeable batteries have a life cycle and eventually fail to hold a full charge. The electric charge between the two terminals of the battery encurages dendrite formation. Rechargeable batteries are a popular and cost-saving choice to power tools, games and appliances. Still, if you have a dead car battery, there are several things that you can try to get yourself back on the road, even if it’s straight to a repair shop or auto parts store for a new battery. Can I use a regular AA 1.5v battery to recover a nimh rechargeable AA 1.2v battery? 1 year ago I then tried to recharge fully and the phone became extremely hot and stayed that way at least 12 hours, not plugged in. 18 April, 2017 . Plug your AC adapter in and using the wires, boost your dead battery. Jump a small charge from a live battery like you have done and the charger will the recognize the battery and charge it. A few deays back i bought a pack of Ni-MH battery of 2400mAh. Share it with us! Yes sir! Nice one thanks bro worked great on one of my rc car batteries thanks again. That will casue it to get hot and melt. This worked with Midland BATT5R .. A battery pack with 3 unknown Ni-MH inside ! They are relatively cheap to purchase and can be recharged numerous times. It was at .72 v positive. It’s always better to prevent damage than repair it, and in the case of the car battery, “replace it.” The only way to deal with car battery hard sulfation is to prevent it in the first place. Removing it before it is charged could result in your battery never reaching its full charge level. Take another voltage reading of the battery around a minute after being on "wake up," or alternatively check your charger's manual to see when the process should be complete. Car batteries tend to last for several years, but lifespan depends on how they are used. Finally, plug it back in, and let it charge for at least 48 hours without a break, which should improve its overall battery life. 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