I've had some great success uncovering and fixing my cordless phone's battery problems. My bit of inspiration came from this thread that deliberately mis-match the charge on batteries.
When I remove the shrink wrap around my NiCad battery packs, I'm able to measure the voltages of individual batteries that are wired in series and found out that the middle cell was measuring less than a volt. The other two cells were fine. I then attached leads from my indepedent channel charger (Camelion BC-905a) to the middle battery and it was charged in 20 minutes. Did the same to the other "charged" batteries (normally charged by the phone's simple trickle charge circuitry...a resistor ?).
Result: The phone worked like new. Previously, the sound was scratch and full of static. I think a lot of phones progressively get like this due to the growth of dendrites preventing chargers from restoring the charge on batteries. The new chargers with pulsed high currents, with their high charge rates, are probably capable of removing some of these nasties.
PeAK
When I remove the shrink wrap around my NiCad battery packs, I'm able to measure the voltages of individual batteries that are wired in series and found out that the middle cell was measuring less than a volt. The other two cells were fine. I then attached leads from my indepedent channel charger (Camelion BC-905a) to the middle battery and it was charged in 20 minutes. Did the same to the other "charged" batteries (normally charged by the phone's simple trickle charge circuitry...a resistor ?).
Result: The phone worked like new. Previously, the sound was scratch and full of static. I think a lot of phones progressively get like this due to the growth of dendrites preventing chargers from restoring the charge on batteries. The new chargers with pulsed high currents, with their high charge rates, are probably capable of removing some of these nasties.
PeAK
