speaking of chargers, im using nicad batteries on my rc cars.
they are from late 1990's and still work!
did a high amp flash charge, discharge cycle a few times and it's charging pretty well. it's on a high tech (at the time) digital charger so it can detect peak amp and volts for optimum charging.
even got a 1700mA to charge 2023mA at 1.94amp rate.