At the time of writing, the latest AA NiMH (Nickel metal Hydride) batteries have a capacity of up to 2900 mAh. Using an original-type conventional battery charger (supplying 125 mA), the charging time will be extremely long.

The charger we propose here should accelerate the recharging process of NiMH batteries, which hare becoming more and more common (we must do our bit for the environment).

The design is based on the MAX712 made by Maxim.