I am using 3rd party batteries and chargers from DiamondBack on my 40D. I first heard about DiamondBack over in the Digital Photography Review forums and they were recommended by many Canon users. I have been using 3rd party batteries without any problems for many years across several Cameras and Camcorders. I would buy from reputable 3rd party providers such as have been shared within this discussion and you won't go wrong. Heck even many of the "big boys" Dealers also carry 3rd party batteries, so don't be afraid to use them and save some significant coin.


DiamondBack Batteries


Rick





PS: I have not noticed any difference in the life of the 3rd party batteries I got from DiamondBack vs the Canon battery and I rotate them frequently. Their price on the BP-511A is $11.99 and I like that they do not overstate the batteries capacity as some dealers choose to do.