Canon Battery NB-4L (SD20/30/40/200/300/400/430/450/600/630/750/1000/TX1) at KEH Camera
Amazon.com : Kastar Battery (2-Pack) and Charger Kit for Canon NB-4L, CB-2LV and PowerShot SD400 SD430 SD450 SD600 SD630 SD750 SD780 is SD940 is SD960 is SD1000 SD1100 is SD1400 is TX1,
2x Pack - UpStart Battery Canon NB-4L Battery - Replacement for Canon NB-4L Digital Camera Battery (890mAh, 3.7V, Lithium-Ion) - Walmart.com
Canon CB-2LV Blue Battery Charger for Canon NB-4L Battery, Canon PowerShot SD40 | eBay
Amazon.com : Energizer ENB-C4L Digital Replacement Battery NB-4L for Canon IXUS 120 IS, 30, 50, 80 and PowerShot SD1000 and TX1 (Black) : Digital Camera Batteries : Electronics
Kastar 2-Pack Battery and LTD2 USB Charger Replacement for Canon NB-4L NB4L, NB-4LH NB4LH Battery, Canon CB-2LV Charger, Canon Digital IXUS 120 IS, Digital IXUS 130, IXY Digital Wireless Camera - Walmart.com