Thanks Wadizzle. I saw that the LP-E6NH are officially discontinued, but mine work fine so I'm not planning on rushing out and replacing what I've got unless there is a great reason to do so. Something like they tend swell up and damage the camera or tend to catch on fire, or new firmware won't support them kind of thing. They are currently plentiful used but I've never thought of buying a used battery before. I'm guessing one might to well to get 50% of the battery life out of a battery that is 50% of new, so probably not a great value proposition.
