The BC-DC4 Battery Charger from Leica is designed for use with the D-Lux 2, 3, and 4 cameras as well as the C-Lux 1 camera. The charger is designed for the original BP-DC4 battery pack supplied with these cameras, or any Leica replacement batteries.
It is noted by Leica that the charger may generate a little noise and heat when in use, and this is not a malfunction. The battery will retain a charge for a long time but eventually run out if it is unused for long periods of time. As with all device chargers it should be unplugged from the electrical outlet to conserve electricity that is wasted when left plugged in.