I bought this battery a few years ago as a backup for my Canon DSLR for photographing a specific week-long event once a year. Other than that, I rarely use this backup battery and mostly use the original Canon battery. Initially, it would hold a charge for a few hours, but now it won't stay charged more than five minutes, literally. Given how little I've used it over the past few years, this is ridiculous. I'd rather spend more money on a Canon battery that will actually last a while than to buy another one of these. Don't waste your money.