Any hope for dead Lith-Ion batteries

[Woodwackr]

Well yes and no.
Yes both of the dead ones took a charge but they do not hold it a long time.

And...you're still alive

 

[Bill G]

And...you're still alive

Barely......

I got raped Friday by a plumber
Then this morning his secretary called and said I owed more.

 

[jakethesnake]

Barely......

I got raped Friday by a plumber
Then this morning his secretary called and said I owed more.

Was she cute at least??

 

[Bill G]

Was she cute at least??

Not in the slightest

 

[Wilhelm]

Repack them, gives You a second chance at popping a couple cells.

 

[Wilhelm]

Neighbor: Batteries won't charge!
Me: Are You serious?
HINT: Compare the middle contact.

 

[jakethesnake]

I have repacked the old 18v dewalt. Just solder the batteries in a Swiss and you were good. The ones I rebuilt are still all good

 

[Bill G]

There are guys on eBay that sell what they claim are adapters to use 18v Milwaukee batteries on Porter Cable tools.
They do not work

 

[jakethesnake]

There are guys on eBay that sell what they claim are adapters to use 18v Milwaukee batteries on Porter Cable tools.
They do not work

I’ve heard good things about the adapters. I use 18 to 20v dewalt adapters regularly. Never used batteries from a different tool though. I thought for sure they’d work though

 

[Woodwackr]

Neighbor: Batteries won't charge!
Me: Are You serious?
HINT: Compare the middle contact.
View attachment 445636

Well, he obviously didn’t, 1. Push hard enough, 2. Use a hammer.

 

[Woodwackr]

Repack them, gives You a second chance at popping a couple cells.

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View attachment 445635

And, the low ah 18650s are cheap in bulk.

 

[redline4]

Last summer my wife and I happened to take a once in every 3 years trip to 'the Mart'..
I happened upon this and thought for the price it could live in our 5th wheel for the rare time I could use a drill and not have to pack my drill from my garage..


Got it home, went to charge the battery and the charger flashed error.
I put it back in the box, it got shuffled around and forgot about.
I found it in my shop while looking for something else and took it with me to work today.
I was talking to a buddy in the body shop and he saw it sitting on my bench. Told him the story..
He went and got an adapter for a Dewalt battery that has a switch and 2 leads he uses for window motors and such on cars that he's repairing.
We momentarily touched the leads to the dead battery, put it back on the charger and it's currently taking a charge.

 

[Wilhelm]

Last summer my wife and I happened to take a once in every 3 years trip to 'the Mart'..
I happened upon this and thought for the price it could live in our 5th wheel for the rare time I could use a drill and not have to pack my drill from my garage..
View attachment 445941

Got it home, went to charge the battery and the charger flashed error.
I put it back in the box, it got shuffled around and forgot about.
I found it in my shop while looking for something else and took it with me to work today.
I was talking to a buddy in the body shop and he saw it sitting on my bench. Told him the story..
He went and got an adapter for a Dewalt battery that has a switch and 2 leads he uses for window motors and such on cars that he's repairing.
We momentarily touched the leads to the dead battery, put it back on the charger and it's currently taking a charge.

Classic jump start just so the charger recognizes and accepts the battery.

That was cheap, fingers crossed You get a bit of work out of that set.

 

[edisto]

I’ve heard good things about the adapters. I use 18 to 20v dewalt adapters regularly. Never used batteries from a different tool though. I thought for sure they’d work though

I have adapters to use new Milwaukee batteries on old Milwaukee tools. They work fine, but I have to remember to disconnect the battery, or it will drain low enough that I have to jump it.

I fixed some male spade plug ends onto a couple of wires to do the jump from another battery.

 

[jakethesnake]

I have adapters to use new Milwaukee batteries on on Milwaukee tools. They work fine, but I have to remember to disconnect the battery, or it will drain low enough that I have to jump it.

I fixed some male spade plug ends onto a couple of wires to do the jump from another battery.

I’ve heard the same with dewalt

 

[bogieboy]

Repack them, gives You a second chance at popping a couple cells.

View attachment 445634
View attachment 445635

I just repacked a 5.0 milwakee a few weeks ago, and have another to do yet... 1 cell set in the battery would self discharge, and draw the whole pack down with it. I harvested cells from a random 60 or 80v( cant remember right now LOL) pack i found for $7 at a bin store, 20 18650 cells, if i remember correctly, the cells were 3500mah rated so, now that 5.0 is technically a 7.0...LOL as they use a 5s2p configuration for anything over the compact 1.5 and 2.0 redlithiums.

Using a battery spot welder and nickel sheet has a bit of a learning curve, but once you get it down, its soooooo much easier than trying to solder the pack together, and not melt the bits that shouldnt melt, and still have it fit in the case...LOL

 

[Wilhelm]

If You really harvested 20 3500mAh 18650 cells out of a 7$ battery pack then You scored big time!
Maybe You should get another pack to keep on hand.

I got 42 18650 Sanyo cells rated 2000mAh out of an EGO 56Volt 6Ah battery pack.
I was hoping for 3000mAh cells, didn't get lucky on that.

 

[Wilhelm]

Did You find any markings on the harvested cells?
If they are brand cells they should be marked and You can find specs online.

 

[bogieboy]

Did You find any markings on the harvested cells?
If they are brand cells they should be marked and You can find specs online.

I will check tomorrow, they are sitting in The shell of the battery that i harvested them from (best way to keep cells from shorting out is likely keeping them in the holder designed for them right? LOL) and that is on my toolbox at work... i dont remember if there was a brand or not, but i know they have the mah marked, and possibly an identifying number that might lead to a manufacturer? All i k ow is the pack i rebuilt lasts significantly longer than the other 5.0 pack that i have, and holds a higher voltage under load, wanna test the current draw on a milwaukee battery, stick it in the 18v brushed 4.5" angle grinder.... that will show voltage sag in a hurry....LOL

Also, i dont know if you are familiar woth a Bin store? Thsy buy pallets of amazon returns and put them in bins, everything is the same price based on what day it is, essentially the longer it sits there, the cheaper it is... downside is whats there is completely the luck of the draw... there was only one battery there, and i havent seen any since... LOL

 

[Wilhelm]

Didn't know the definition of a Bin Store, sounds like fun to sift through.