Cordless tool battery hack..... Worked for me.

[Bill N]

I have a 40V battery which only had on cycle on it (basically new) that wouldn't take a charge.
This hack worked for me saving me a bunch!!
Hope it can save someone else some money and frustration as well!

 

[kaydano]

I have a Ryobi drill with one good and one bad battery. When I get a chance I will try this!

Thanks for posting!!!

 

[sunedog]

The battery was so dead the smart charger didn't sense it until some voltage was transferred to it from the good battery. Same exact thing happens with really dead car batteries. I've had to use this trick more than once recently since my son's Tacoma had a parasitic draw that was draining the battery regularly. Thankfully, I figured out the culprit and the truck runs great again.

Here's the vid that taught me how to handle the really dead car battery:

How to Charge a TOTALLY Dead Car Battery with Kent Bergsma: Battery Clinic Part 5

 

[Pbakk]

Great info Kaydano - thanks!

 

[kaydano]

I'm sure you meant to thank Bill or sunedog, but you're welcome on behalf of them both!

 

[Hunterman]

Good info. Thanks for the share