Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Same as Canon

I bought the Canon Digital Rebel like a month ago, it came with an original Canon bp-511 battery, but in addition I also ordered a sunpak equivalent to have a spare. I see no difference whatsoever between those two batteries, except that the sunpak is more than 10$ cheaper! It also "seems" to me that the sunpak recharges faster (than the original) with the same Canon battery charger that came with the camera, but again it's just an impression...