... An energy-saving ...

For many years I own a can opener that opens cans in the same way as this. My old opener has to at least 12 years and hundreds of cans quits. I opted for the "Fissler Magic" because he is not as clunky as my old opener. It is well made, easy to store, and easy to find by the points on the handle, in my kitchen store fray.
This can opener, the side cuts open the cans at the fold, eliminates the squeezing of two handles, as is required by conventional can openers. You turn on the ergonomically shaped, smooth turning handle short back, and part links arms without effort. For old people who do not have much power in hands and fingers, so a can opener is particularly suitable.
I open nearly all doses, including those which have a pull tab, with this opener. The lid is removed completely, and the contents of the can can be unharmed toppled onto a plate. This may occur after tuna or sardines very appetizing because the content is not tattered. In fish in sauce my children always licking from the cans. Hurt you can not.
Some doses also I remove the ground (eg with the small Tomantenmarkdosen or corned beef) and press the content out leaving virtually no residue. That the lid on the can back in place is not bad, although I rarely need and possess for common can sizes plastic lid.
I would highly recommend this very opener and would him, although there are certainly cheaper, to buy at any time.