Have a look at this:
How to revive your laptop battery :
http://www.youtube.com/watch?v=t3OO1Ui9vSoHere are some more videos for recycling your other batteries:
http://www.youtube.com/watch?v=PzIlVLOH9XIhttp://www.youtube.com/watch?v=H60xtiY8gXEPlease be very careful,
if you do this, especially if you do it with Lithium
Batteries !
With Li Batteries never use this welder, as it could explode
your batteries.
With Li batteries always use only a little higher voltage
than your cell voltage,
so if you use a cell phone Li battery, which has a nominal voltage of 3.7 Volts, just use
just a little less
than 4 Volts and set your DC supply current limiter to maximum 3 to 5 Amps.
With laptop Batteries, that have 12 Volts,
just set it a bit higher, like 12.5 Volts
and use only small short taps to the contacts and check,
if your batteries get warm.
Very important:
Also with Li Batteries, never use the reverse discharge method
as shown in the welder video, but only the normal charging direction
method as in the first video !!!
If they get hot, immediately stop and wait, until they are cold again.
Only do this outdoors and wear a safety glasses and use gloves
and shield yourself, if the batteries would explode...
I am not responsible for any accidents and you do it at your
own risk ! Be safe and think twice, before you do anything like this
and don´t use too much power (volts x amps) if you do it...
The physical effect behind it is, that you burn away with these
about 3 to 5 amps pulses the small electrode metal bridges, that build up
over time internally on your battery electrodes, that automatically discharge your battery internally.
If these are "burned" away, your battery will again recharge much better and stay more
healthy.
But please be careful, when you do these experiments, especially,
when you use Li batteries.
I just successfully revived 2 small AAA NiMH accu batteries this way and they
work great again now.
Regards, Stefan.