I notice the in the manual for the Canon 60D that you can "register" your battery packs (pp269). (The manual can be found at [URL]http://gdlp01.c-wss.com/gds/9/0300004019/01/eos60d-im-en.pdf[/URL].) You can register up to six battery packs to the camera. Being of a somewhat suspicious nature it occurred to me that this may be Canon's way of making sure you only use their batteries instead of cheaper generics. (remember inkjet cartridges with chips.) Has anyone had any experience with this, i.e. successfully used generic batteries in a Canon 60D camera?