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lithium Ion batteries back from the dead!

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Forum topic by squazo posted 08-13-2020 07:15 PM 519 views 0 times favorited 10 replies Add to Favorites Watch
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squazo

185 posts in 2493 days


08-13-2020 07:15 PM

I brought 3, 5 AH batteries back from the dead! SPOOKY I know. You basically make a pair of jumper cables and hook the dead one to a good one. There are a bunch of youtube videos out there and all I did was follow them, Im so happy I saved about 300 bucks worth of Milwaukee batteries and I figured some of you guys had some dead ones floating around in the garage.


10 replies so far

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pottz

11216 posts in 1832 days


#1 posted 08-13-2020 07:42 PM



I brought 3, 5 AH batteries back from the dead! SPOOKY I know. You basically make a pair of jumper cables and hook the dead one to a good one. There are a bunch of youtube videos out there and all I did was follow them, Im so happy I saved about 300 bucks worth of Milwaukee batteries and I figured some of you guys had some dead ones floating around in the garage.

- squazo


interesting i just bought two new hitachi batteries but ive still got the old ones,might have to check into this before they go to the grave.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

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pottz

11216 posts in 1832 days


#2 posted 08-13-2020 07:54 PM

just checked out some you tube videos and they all showed it reviving dead batts so im gonna try it,nothing too lose. thanks for posting this.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

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torus

485 posts in 1261 days


#3 posted 08-13-2020 08:08 PM

do it safely! Lithium battery can go with a bang…

-- "It's getting better..." - put this on my RIP stone!

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pottz

11216 posts in 1832 days


#4 posted 08-14-2020 02:02 PM

well i tried the procedure and either mine are really dead or it doesn’t work,i got no life back so i cant say if it works or not for sure.nothing lost in trying.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

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splintergroup

3978 posts in 2070 days


#5 posted 08-14-2020 03:07 PM

Li Batteries can grow “dendrites”, basically a tiny whisker that grows between the anode and cathode that eventually shorts the cell out. I know the old trick to restore NiCad batteries involved using a large charged capacitor across the leads, the massive dump of current would burn away any similar features shorting out the cells internals. Never heard of it being used for Li batteries, but figures that someone would give it a go!

View AndyJ1s's profile

AndyJ1s

414 posts in 603 days


#6 posted 08-14-2020 04:33 PM

Yeah if it works, you get a dead battery back to life.

If it doesn’t, you could end up with two dead batteries… (the short in the bad one could take out the good one).

Proceed with caution.

-- Andy - Arlington TX

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pottz

11216 posts in 1832 days


#7 posted 08-14-2020 05:05 PM



Yeah if it works, you get a dead battery back to life.

If it doesn t, you could end up with two dead batteries… (the short in the bad one could take out the good one).

Proceed with caution.

- AndyJ1s


no harm to my good one,it just didn’t work so the dead ones will get a burial. :-(

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

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LeeRoyMan

1399 posts in 575 days


#8 posted 08-14-2020 05:11 PM

I heard you have to put them at the top of a hill during a rain storm,
and when lightening hits it they come back to life,
You just have to find them afterwards.

I actually have never tried it, but if it did work, how much more use would you get out of it?

-- I only know... what I know....

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squazo

185 posts in 2493 days


#9 posted 08-14-2020 10:22 PM

from what I read is the batteries get drained so low from sitting for an extended period that the charger detects that it is below its cut off limit. It thinks it is broken and doesnt even try. What I did by jumping it is to get it back above that lower limit so that it may now be charged normally. So far so good all 3 are charging normally.

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pottz

11216 posts in 1832 days


#10 posted 08-14-2020 11:37 PM

well mine were totally dead,couldn’t even light the led light.no i think mine are just dead as all batteries eventually get.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

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