The BP-827 lithium-Ion battery pack is the perfect power source for select Canon cameras. The battery pack is rechargeable, allowing for multiple usage. The battery can hold its charge well and does not suffer from memory effect. Moreover, Lithium- Ion batteries offer the best energy to weight ratios of any battery technologies, ensuring that the batteries remain small and lightweight. Rechargeable Intelligent Battery for Canon VIXIA HF G10, HF S30, HF M32, HF M40, HF M41, HF M400 Camcorders.