Energizer ENB-C4L Digital Replacement Battery NB-4L for Canon IXUS 120 IS, 30, 50, 80 and PowerShot SD1000 and TX1 (Black) Replaces the Canon NB-4L Li-ion Battery Battery Specs: 3.7V 750mAh Compatible with Canon IXUS 120 IS/30/50/80/PowerShot SD1000/TX1 & similar camera models Can be used with original lithium-ion battery charger This Li-ion battery is 100% memory-free and will not suffer from the inconvenient memory effects that are typically associated with similar battery types.