Probably don't last as long as the original Canon batteries, but for the price, its a no brainer. I use three of these, and rotate them. Between all three, I can get a full day of shooting without needing to access an electrical outlet to recharge. Lenmar LIC911 Lithium-ion Camcorder Battery Equivelent to the Canon BP-911, BP-914 and BP-915 Batteries'
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