Lithium-ion technology is the foundation behind this long-lasting battery for select Canon professional camcorders. The BP-975 resists memory effect: recharge this battery when needed, knowing you'll have uninterrupted power when the situation demands. The high-capacity Canon BP-975 can give you up to 50% more recording time than the similar, yet lighter BP-955 battery pack. Four LEDs on the back of the battery provide a snapshot of the remaining power, and this battery intelligently communicates remaining operational time to select Canon camcorders.