Canon Powershot SD550 Digital Camera Battery (800 mAh) - Replacement for Canon NB-3L Battery Replacement battery for the Canon NB3L, Lithium-Ion (Li-ion) 3.7V (800mAh) This Synergy Digital battery is fully compatible with the original Canon NB3L Battery. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark