Progo Brand Intelligent Li-Ion Rechargeable Replacement Digital Camcorder Battery For Canon BP-819 BP819 (Extended Capacity of BP-808 BP-809). Made with info-chip. Made with info-chip, which can show remaining time on camcorder LCD. It also can be charged by Canon original charger and camcorder. 100% Compatible with original manufacturer equipments and chargers, guaranteed! Integrated microchip prevents overcharging, overheat & provide short circuit protection. 7.4v 2000mAh One year USA warranty!