How to fix a non charging ryobi 18v battery. Revive a dead 18v battery 

Great trick. Revived my 18v Ryobi battery. No multimeter, just held wires against warming battery few times a bit longer and it did the trick. 👍

Ok so I had two brand-new basically just hadn't been used in nine months Ryobi lithium 18-volt one batteries and both of them did not work I did exactly as you taught me on this video and I just hit it one time each one one-time real quick off of a battery that was fully charged and the charger started charging them right away thank you for this for your video

This worked great! Much better than other methods that require a power supply or another adapter. I didn't have a multimeter handy, so I made the connection and counted to 12. Did this 5 times and the battery was able to start charging. Thanks so much! Saved me $40! Cheers from America!

You are the best. Worked like a charm. I'll be forever grateful. Thanks, man.

Loved your video!! You are hilarious and got the job done.

Thanks, this worked for me. I only had one Ryobi battery but used a Dewalt 20V as my charging battery. I got my Ryobi to 14v and put in the in charger and it charged fine. Was also scared about a battery explosion, but everything worked out.

Thank you brother...I'll give it a go this evening before heading out to Home Depot for a spare!!!

Good recovery Karl, well done matey… ✅ Only thing I would mention to be very careful of, even with an apparently dead Lithium battery, is do ensure the bare cables, you are using to touch the good battery terminals, never touch together - you would almost certainly bugger your battery for certain (and potential get a somewhat larger spark than you did if there is some charge returning!)… ⚡️ 🔥 On a different tack - what is the nifty little Green toolkit you used… 🤷🏼‍♂️ 🐸

similar case here still hoping to fix it though, I have an old cordless drill machine ndci which i just coonverted to lithium battery arranged in series. , after building the pack, it wont charge.is it a must to add tp450 or BMS before it can charge?

"I'm in the pub in the garden" Bloody show off! :D

Thanks!

Do You Have Any Red & Black Jumper Wires To Jump That Battery With I Think Once You Get Atleast 7 Volts In It Put It Back Together Then Throw It On The Charger.

Very helpful thanks! But it’s the best final test to see how long it provides service under load? Perhaps intermittent? and steady use? and shelf time?

A 20V One+ Ryobi battery has to be at least 16V to charge in the charger. Supposedly the charging circuit will not let a battery with less voltage than 16 volts charge as there is danger with charging a low voltage battery: ie: a battery fire might occur quickly. Therefore you should keep the charging batteries in a safe non-flammable environment that will not catch fire if the battery begins to burn. Often you can raise a battery that isn't too far below the "safe" threshold by by moving it in and out of the charger so the red light stays on and the green flashes and measuring the voltage from time to time to make sure it's increasing. Eventually you will get the battery past the threshold and it will charge , if all the cells are good, to a voltage near enough to the operating voltage, and you don't have to take the battery apart to raise the voltage this way! Always protect your eyes when working with these batteries, in case one explodes.

You know batteries, Jon Snow

So what do you do if the voltage on the actual batteries is 18v but the post for the tool reads .1 after a couple of seconds?

One suggestion for the sake of safety. Since it is possible that one or more cells in the depleted battery are totally dead (shorted), that could result in the other cells being put into an over voltage condition by jumping the battery in this manner. So the periodic voltage checks should take a measurement across each individual cell to be sure that they are all getting to similar voltage as they are getting recharged. The electronics in these batteries can normally see to that, but this jumping bypasses the electronics.

Good job. Thank you. In case you haven't heard you have a bit of an accent 😅

Curious how many more cycles have you got out of the ‘revived’ battery?

I have a DeWalt 5 amp hr 20V battery that would not charge and I put it in a different charger which charged it right away.I have 12 of those batteries and only one tricky to charge.It is nearly 9 years old. CHEERS from HERE! P.S. Try not to run below one bar before charging up.

Thanks

Gonna try this on my dead 5ah battery. Only have 9ah battery available to jumpstart the 5ah, wouldn't think that matters too much or? And I dont have a voltmeter, but I recon a "couple" of jumps from alive to dead will do it? Will take them outside since its sunny here today, hopefully I will not explode 😂 Cheers 👍

I wonder if the battery is still good or how long it lasted?

Does this mean that if my battery is not completely dead this method wouldn't work

Your video is good, but you talk funny.