Duracell dr9933 rechargeable battery for canon digital cameras battery capacity of 1000 mah at 7 4 volts direct replacement for canon nb 7l batteries compatible with a large range of canon cameras li ion chemistry no memory effect duracell dr9933 rechargeable battery for canon digital cameras battery capacity of 1000 mah at 7 4 volts direct replacement for canon nb 7l batteries compatible with a large range of canon cameras li ion chemistry no memory effect