We bought these batteries to take with us to Disneyland since our original Canon battery was not holding a charge for very long. The batteries worked fine in our Canon S410 camera and charger. We had no problem with the batteries at all. I wouldn't say they held a charge for a longer time than the original Canon once did but getting 2 for the price way less than one Canon battery makes up for it. Thanks Overstock for offering such a great deal!