Canon BP511A 1390mAh Lithium Ion Battery Pack for Select Digital Cameras and Camcorders

As a wedding photographer, I can't waste time swapping batteries all the time. I'll never buy the inferior fakes again. After 6 months the fakes don't hold a charge.

Yes the Canon battery costs more, but even after 4 yrs of continual use, it's still superior to the fakes.

have had this battery for a while now and it seems to work fine. Holds a charge for quite a while and I would recommend buying it again.

the battery handles well, i was shocked when it drained after maybe 100-200 shots, but i realized i'm always using IS, autofocus and live view on my 40d that time, i was learning the functions of my new camera so it was drained right away, soon i'll be testing how many shots i could take with a full charge with this battery, my only complain is that it's expensive, canon is being not so reasonable here, they are not the one who's making the batteries and yet they price it too much.

It's not cheap but it works fine. As others have written, the price is somewhat painful. Unlike some, I am not willing to purchase a cheap non OEM battery that might leak in the camera thus causing warranty complications!
Canon accessories aren't cheap but after working with Canon for 15 years on printer projects, I feel confident they thoroughly test their products and honor their warranties.

Wow, I'd come to Fry's and got to know that they sell this single battery for $70.00 while you can buy here a pair of it for the same price and point is that they're both Canon product and work like a champ. Go for it guys.