New answers tagged battery
The batteries are interchangeable among certain groups of cameras. You need to look at the battery's "E" number and figure out which "group of cameras" it can fit into. Below are some battery types and the cameras they fit into (not an exhaustive list) LP-E8 - EOS 550D, 600D, 700D, T2i, T3i, T4i,T5i LP-E5 - EOS Rebel XS, Rebel T1i, Rebel XSi, 1000D, ...
You can put a charged EN-EL 14 battery and the internal battery should recharge as it charges both from an AC adapter or a battery. I usually leave the battery on the camera anyway, even though the manual says you should remove it if you don't use the camera for a long time. I like to be able to pick it up and start shooting right away :)
As a warning to anyone thinking of buying a USB battery pack, don't -- my NEX goes into USB mode when I plug in a USB cable, even if it's a charge-only cable. Which means that it doesn't let you take photos -- the entire UI is replaced by a "USB" indicator. I tried changing the USB mode from mass storage to MTP to auto, to no avail.
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