The ACK-800 AC Power adapter is designed to supply uninterrupted power for your camera while downloading pictures to your computer, for extended work in a studio, or while viewing images while connected to your TV or VCR.
For Canon PowerShot:
SX120 IS, SX110 IS, SC100 IS, A2100 IS, A2000 IS, A1100 IS, A1000 IS, A720 IS, A710 IS, A700, A590 IS, A570 IS, A580, A560, A550, A540, A530, A520, A510, A495, A490, A480, A470, A460, A430, A410, A400, A310, A300, A200, A100, E1