Bringing A Lithium Battery Pack Back From The Dead

[Mastermind]

Here's something we've all seen. Put the battery on to charge, and the dreaded "bad battery" lights start flashing, and it won't charge.

Here's how I fixed one of mine.

Tools needed:

Volt/Ohm meter.



Old charger:



H-Torx bits:

 

[Mastermind]

Take the case off the battery, and identify positive and negative.



Then I marked the positive....

 

[Mastermind]

Cut the end off the charger. I mean....WTF have you been keeping the damn thing for anyhow?



Attach one side....



Then touch, remove, touch, remove, touch, remove, the other side for a couple of minutes. These things charge in pulses....so.

 

[Mastermind]

When I first checked this battery it was at 3.7 volts. After 2 minutes of charging with the old camera charger, it was up to a little over 10 volts. So I put it on the charger, and the flashing bad battery light was gone.

 

[ucm931]

When I first checked this battery it was at 3.7 volts. After 2 minutes of charging with the old camera charger, it was up to a little over 10 volts. So I put it on the charger, and the flashing bad battery light was gone.

So.....now you're 6 months, 3 weeks, 4 days, AND 2 minutes behind on port work?

GET BACK TO WORK SLACKER!

 

[Mastermind]

So.....now you're 6 months, 3 weeks, 4 days, AND 2 minutes behind on port work?

GET BACK TO WORK SLACKER!

But.....but.....but.....

I fixed my fuggin battery pack !!!!!!

 

[Fruecrue]

I’ve used another known good battery to boost them back up to chargeable range.
Just connect positive to positive and negative to negative for a few minutes then charge as normal.
Never did have one return to full service life though, seem to die quicker.

 

[Mastermind]

Never did have one return to full service life though, seem to die quicker.

Don't you dare burst my bubble !!!!!!!!!!!!!!

 

[Woodaddict]

When I first checked this battery it was at 3.7 volts. After 2 minutes of charging with the old camera charger, it was up to a little over 10 volts. So I put it on the charger, and the flashing bad battery light was gone.

You resuscitated it! PADDLES! CLEAR!! we got a pulse.

 

[3browns]

I never knew a Dremel tool used an 18v battery pack

Or is that for your cordless angle grinder and stuffs...

 

[Mastermind]

I never knew a Dremel tool used an 18v battery pack

Or is that for your cordless angle grinder and stuffs...

18v butt plug. Keeps the gasses in.

 

[3browns]

18v butt plug. Keeps the gasses in.

Oh my...

 

[3browns]

18v butt plug. Keeps the gasses in.

Pics?

Asking for @tree monkey ...

 

[ucm931]

18v butt plug. Keeps the gasses in.

 

[Mastermind]

Pics?

Asking for Treemonkey...

This is a family site Michael !!!

 

[Mastermind]

View attachment 226263

Wow.

Just Wow.

 

[3browns]

This is a family site Michael !!!

Apparently you haven't met my family

 

[XP_Slinger]

18v butt plug. Keeps the gasses in.

That got me lmao!

 

[stihl livin]

Don't you dare burst my bubble !!!!!!!!!!!!!!

what do you expect from the Dave the plumber

 

[MG porting]

Wow.

Just Wow.

There went you're family Chanel.