Energizer
Bower ENB-C6L Energizer Digital Replacement Battery NB-6L for Canon PowerShot SD4000, D10 and IXUS 85 IS (Black)
$27.99
This high-power 7.4V 750mAh Li-ion battery from Energizer replaces the NB-4L for Canon IXUS 120 IS/30/50/80/PowerShot SD1000/TX1 & similar camera models. This rechargeable battery can be charged at any battery level, always allowing a full charge (100% memory-free).