Original Canon BP-820 Lithium-Ion Single Battery (1780mAh, No Retail Packaging)Short Description Lithium Ion Chemistry 7. 4 VDC 1780mAh Capacity In The Box Canon BP 820 Lithium Ion Single Battery Pack (1780mAh, No Retail Packaging) Long Description This Canon BP 820 Lithium Ion Single Battery Pack uses lithium ion chemistry and has a capacity of 1780mAh with a voltage of 7. 4 VDC. The battery is designed to resist memory effect, so it continues to last just as long between charges as it did when it was new. This battery comes