Amazon.com : Big Mike's BM Premium NB-7L Battery for Canon PowerShot G10, G11, G12, SX30 is Digital Camera : Electronics
Canon PowerShot G11 Battery Replacement
DSTE NB-7L Camera Battery (2-pack) and Charger Compatible with Canon PowerShot PowerShot G10, G11, G12, SX30 IS
BM Premium 2-Pack Of NB-7L Batteries & Battery Charger Kit for Canon PowerShot G10, G11, G12, SX30 IS Digital Camera Includes Battery + AC/DC Battery Charger - Walmart.ca