Canon BP – 827 Camcorder Battery has Chemistry Lithium-Ion Capacity 2670mAh.
For Canon HF-G25, Canon HF-G30
Take advantage of uninterrupted power with this rechargeable Lithium-ion battery. Lithium-ion batteries last longer and are resistant to the effects of the “memory effect”, meaning you can charge and recharge your battery without fear of draining the battery. Times vary depending on camcorder and shooting conditions.