Rechargeable Can Openers

They stink.

We have one -- very nice looking, ergonomic hand grip, cute little stand to put it in to recharge.
Trouble is, it has no 'strength.' It can run for minutes if you just push down the lever, but stick it on a can and give a load, and no go. It might make it around a small can, but something like a large coffee can -- no way. It starts off with a loud growl that grows into a shrill whine then the whine slows and it...comes.....to.......a.........grinding...........halt.

I think I'm like that sometimes. I can talk a good talk, but put load on and do I keep going and finish my work, or do I growl and whine, slow up, and eventually come to a stop?

Ouch.