This compact charger and AC adapter can charge two BP-511 battery packs simultaneously at a rate of 90 minutes each. Also, when used with the DC-Coupler DR-400, it allows the 30D, 50D or 5D to use power directly from an AC power source. Note that the CA-PS400 cannot charge battery packs when used simultaneously with the DR-400. Location: Kapolei it's NOT ok to contact this poster with services or other commercial interests hawaii