I've owned one of the classic plug-in counter-top can openers for years. It takes up space on the counter when not in use. I wanted to find the best compact battery operated opener that I could store discretely in a drawer until it was needed. My choice was the Kitchen Mama One Touch Can Opener.
Things I like
Easily fits in a kitchen drawer
Runs on standard rechargable batteries
Cuts on the side rather than top, leaving a functional lid that can be reused
Things I don't like
The magnet that is meant to hold it down on the top of the lid isn't strong enough. However, that doesn't seem to affect how well it functions... just a bit like the appendix. Probably was meant for something but just not that important.