Shoot for longer with the Canon BP-820 Lithium-ion Camera Battery, ideal for keeping as a spare or replacing your camera battery. Take advantage of uninterrupted power with this Canon BP-820 Rechargeable Battery Pack for HF G30 G40 XA25 XA20. Lithium-ion batteries last longer and are resistant to the effects of "memory effect", meaning you can charge and recharge your battery without fear of draining the battery. Times vary depending on camcorder and shooting conditions.