NiCd/NiMH Battery Charger

Here we have yet another excellent universal battery charger that is easy to build and can be used to safely charge practically all commonly used NiCd and NiMH penlight cells. The only downside of the universal approach is that it is not a fast charger, since it works with the well-known standard charging current of one tenth of the battery capacity in combination with a charging time of 10 to 14 hours.With the advent of nickel–metal hydride rechargeable batteries, capacities have increased and it is no longer necessary to worry about the memory effect.