I have tried other, lower priced brands, but find that the Canon brand holds a charge much longer, produces significantly more pictures per charge and has a life expectancy up to twice as long. Pay a little more up front but expect to come out ahead over the long term.

This is a great price on a this Canon OEM battery. I only use authentic Canon batteries in my Canon cameras. This was the best price I found for these batteries!

I was considering buying one of the 3rd party batteries (for the obvious reason) and I am glad that I didn't. This canon brand is great and with the original battery, I was able to go on a trip without being near a power outlet for a week! Highly recommended!

I still use the original canon BP511 battery which came in my Canon 300D which I purchased in 2003. I also have 2002 Canon BP511 batteries which came in Canon D60 . Amazingly, they are all still working well. To me, they are better than the others because they hold charges better and keep on working many years after the others have died. The price is so much higher than the others, and I do buy some cheaper ones. But,Canon BP511A 1390mAh Lithium Ion Battery Pack for Select Digital Cameras and Camcorders when I do not carry any spare, and if I need to really depend on the batteries in my camera (I use two batteries in each camera), I always choose the original Canon BP511.

I agree with others who have written don't settle for cheaper substitutes! I bought a non-Canon brand backup battery for my Canon 20D years ago and it was good as a backup. But I just went on a 2 week vacation trip this year and as my Canon battery was getting low, I popped in my backup. To my surprise, it was dead, even after recently getting charged! Luckily, I was shooting outside and didn't need the flash, so the Canon battery held out once I put it back in. The backup battery doesn't seem to hold a charge now. Don't try to save some money and then risk losing some good shots--buy Canon! You'll be glad you did.