November 4th, 2009 | 
Author: I borrowed a Sony digital camera a couple of years ago from a friend and it came with a charger similar to a cell phone charger. I just plugged the charger into the camera and then plugged the charger into the wall, but I didn’t have to remove the battery. He had the camera stolen and doesn’t know what model it was.
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I have a Benq DC E43 and it is very slim and has the rectangular ion battery. I just plug the adapter into the wall as with the cell phone.
I guess any camera which uses the ion batteries instead of the AA batteries would charge without having to remove them.
Have you thought about having to charge the battery (which is still inside the camera) when it runs dry and during that, you won’t be able to use the camera at all?
Instead of a camera that you can just pop the old battery out and insert a freshly charged one, and continue to use it..?
Nikon SLRS