The stock rechargeable battery for my Canon PowerShot 630 reached the end of its life, so I shopped for replacement batteries. I found these aftermarket rechargeable batteries through Overstock. The cost for each battery was significantly lower that the price for a replacement Canon OEM battery from other suppliers. I was skeptical because the price was so low, but I purchased a three-pack of batteries from Overstock. I charged all three new batteries when I received them, and so far I am still operating on the first battery without recharging; this is after taking approximately 150-200 photos. There appears to be no appreciable difference in performance when compared to the original Canon battery. Assuming the other two batteries perform equally well, they can't be beat for the price!