It is a good idea, and when it works, it provides a hassle free can opening of all sizes.
Unit does not keep a charge for long.
After full charge, used it 3 times, then it went through the motion but did not cut. I found out that it did not have enough power to cut.
so, after another full charge, it functioned well again.
Therefore, I think it needs more stored power. It would be good to add a window that shows the full charge and the remaining charge after each cut. Also to know when it needs to be charged again.