Dead Dewalt Battery Revivial

[aveatry]

Dead Dewalt Battery Revival
I have a dead battery that will not charge and came across this hack to revive it. Before I try it is that a reason not to. Its only a 1.3 and I have had it a number of years.

 

[Wayners]

Yes it could work but the problem I see is if you have a dead cell. That will continue to pull power 24/7 causing battery to go flat again and not charge. I've seen videos where the dead cell was replaced.
It's up to you if you try this but these batteries are dangerous and a faulty one would worry me

 

[Murdochcat]

Mine are many years old. Just buy a new bigger capacity battery is my advice

 

[Fred Blogs]

Tried this hack on 3 Makita batteries so far and it hasn't worked on any of them. Admittedly two of them were chinese knockoffs.

 

[aveatry]

Thanks everyone I might give it a try, I have other batteries these 1.3 ones came with a drill and impact driver I had 2 in the set and are old I suppose now but I also have 2 newer 2.0 batteries.

 

[StephenStephen]

Thanks everyone I might give it a try, I have other batteries these 1.3 ones came with a drill and impact driver I had 2 in the set and are old I suppose now but I also have 2 newer 2.0 batteries.

Let us know how you get on...

 

[aveatry]

Let us know how you get on...

Yep will do

 

[Elsa TLC]

Keep to the manufacturers battery's. The fakes can be dangerous and vould vost alot of money if they go whoop in someone's house.

 

[aveatry]

Not got round to trying the "fix" yet - yes if I buy i will stick to dewalt

 

[aveatry]

Ok finally got round to trying this and it did not work, I left it for about 1 min and the vid said seconds, is it worth trying for longer.I dont want to end up - kn ackering my new battery that I am jump starting from

 

[Mr Chibs]

I had a DW battery 4ah that was over worked and wouldn't charge or illuminate the led.

I took it apart and used a very small flat blade screwdriver to press the top of each battery call... second to the last battery there was a hiss and presumably some pressure released (saw it on YT) reassembled and all has been well with battery in terms of usage and charging.

 

[opps]

I had a DW battery 4ah that was over worked and wouldn't charge or illuminate the led.

I took it apart and used a very small flat blade screwdriver to press the top of each battery call... second to the last battery there was a hiss and presumably some pressure released (saw it on YT) reassembled and all has been well with battery in terms of usage and charging.

From where was the pressure being released? The end of the cell?

I am not sure that I would be confident enough to use a battery with a swollen cell.

Did the video explain why it had swollen?

 

[aveatry]

As mine is only a 1.3mah its probably not worth me messing any more with it, its quite a few years old as well

 

[Harry Bloomfield]

Dead Dewalt Battery Revival
I have a dead battery that will not charge and came across this hack to revive it. Before I try it is that a reason not to. Its only a 1.3 and I have had it a number of years.

As with some smart lead-acid battery chargers, if the voltage across the battery, falls below a certain level, then the charger, will refuse to even try to charge them. Putting one battery across the other, brings the voltage up, of the 'dud', then allows it to charge. So it might work, or might not if it has dead cells, beyond salvation.

A similar idea works with NiCad cells. These develop 'whiskas', which short the poles together, preventing them taking a charge. They can be 'repaired', by applying a voltage across them, with a large enough current, to burn the 'whiskas' out, like you would blow a fuse. I've succeeded with that, a number of times.

 

[aveatry]

As with some smart lead-acid battery chargers, if the voltage across the battery, falls below a certain level, then the charger, will refuse to even try to charge them. Putting one battery across the other, brings the voltage up, of the 'dud', then allows it to charge. So it might work, or might not if it has dead cells, beyond salvation.

A similar idea works with NiCad cells. These develop 'whiskas', which short the poles together, preventing them taking a charge. They can be 'repaired', by applying a voltage across them, with a large enough current, to burn the 'whiskas' out, like you would blow a fuse. I've succeeded with that, a number of times.

Thanks I tried it attached to another battery for about 1 min and it didn’t work, maybe i need to leave it longer.