Green Extreme Batteries encourage conservation through renewable energycells to maximize their use and to contribute in a modest way to energy responsibility. The Green Extreme Bp-511A is the perfect recharge and go power source compatible with all cameras using the Canon Bp-511/Bp-511A. Designed to meet or exceed original manufacturers' specifications for compatibility and performance.Even our packaging is repurposed material - green! Available for many popular models to power up the most energy demanding cameras and devices.