Kastar NB-4L Battery 2-Pack Replacement for Canon PowerShot SD30, SD40, SD200, SD300, SD400 SD430 SD450, SD600 SD630, SD750 SD780, SD940 SD960, SD1000 SD1100 SD1400, TX1, ELPH 100 300 310 331 VIXIA

Customers find the battery works well and serves as a perfect replacement for Canon cameras, with good quality and value for money. The battery life receives mixed feedback - while some say it keeps a good charge, others report it doesn't last long. The fit is also mixed, with some saying it fits perfectly while others report compatibility issues.