CTA Digital DB-NB4L Replacement Battery for Canon Digital Cameras

From the Manufacturer
This CTA digital battery replaces the Canon NB-4L digital camera battery. It was designed to meet or exceed OEM specifications and is 100% compatible to the original equipment chargers. This ultra high capacity, longer lasting lithium-ion battery was designed to avoid the "memory effect" problem that's common to many rechargeable digital camera batteries, so there's no need to fully drain this battery each time before charging.

Product Description:
High-capacity lithium-ion rechargeable battery replacement for the Canon NB-4L / 900mAh - 3.7v / For use with Canon PowerShot SD200, SD300 & SD400 Get maximum run time on a single charge