Why I buy this one ?
- Rechargeable lithium-ion battery
- Compatible with Canon EOS 5D, 50D, 40D, 30D, 20D, 10D, D60, D30, Pro90 IS, Pro1, G1, G2, G3, G5 and G6 models
- Keep a spare battery ready to capture once in a lifetime shots

buyitnow1615 offers this stuff with condition New, new for:

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What our customer's say!

"Dead after 7 months", No even the only battery, I have the grip and I buy one BP511 from canon and two from Ultralast. The one which came in the camera its dead after 7 months not even with a hard use. The other one, after 12months dead (I use that with my previous 30D)
The ultralast batteries still working good. Just 15$ I pay last year for those, 1600mAh.

"Canon is the best", Like others have mentioned, the Canon branded BP511A seems to last longer than the off brands even though capacity is supposed to be equivalent. I have given up on the knock offs priced $20 cheaper because after a few months of usage they don't seem to hold a charge as long whereas the Canon batteries keep going for years. The Canon batteries will still be able to take 500 or more pictures on a charge even after a few years. None of my knock off batteries can do this.

"what can i say", i like to use CANON products with my Canon products. It's a great battery and its interchangeable with 2 of my other Canon cameras. My last ones lasted 7 years and 3 years with lots of extreme weather use.

"Battery to the rescue", I have an older digital camera and previously ordered what I thought was the correct BP511A battery, nope didn't fit. Returned the wrong size battery and purchased this one and I was so excited that it fitted and now I can take digital photos again.

"Best battery for your DSLR!", First party batteries are the the best if you want long life, compatibility, and to avoid any other issues that may arise. The hefty premium is worth the ability to take more shots than those 3rd party brands!

Read this reviews before You buy...

"Same Quality", This is the exact same battery that comes with the canon 40d. i recommend it if you ever plan on going on location for a shoot so you're not caught on low power in the middle of a shoot

"Same as the battery that came with the camera", Same as the battery that came with the camera, seems to work well so far. Extra batteries are always good:)

"Great Battery!", Great Battery. Got it for my Canon 20D. Used for a wedding this past week in North Carolina where I took over 1000 pictures (preceremony, formals and ceremony) before changing it out. Battery meter still showed full charge but I thought it best to change before shooting the reception events.

"Perfect Battery", This battery work good. It give you confident to use more than copy battery.
I do not know what is inside and I do not know how to find a copy battery that have the same quality.
I compare this one with my 2 copies battery. After that, I throw away the copies.
If you do not have time and do not want to take a risk. Just pay more and enjoy.

"Spare Battery", You'll need a spare battery for your 40D and this one is the real Canon accessory. Allows you to use one battery and have a spare in the camera bag so you can keep on shooting until the dead battery can be recharged.