Mm.
Although what what uh suddenly came into my head is , you know how they always take two A_A_ batteries which which is really not very efficient at all. Could it be possible to have uh , you know , like a rechargeable internal battery , like , well , like an M_P_ three player does ? With that you could jus or a mobile phone or whatever.
Mm-hmm. Mm-hmm.
You could  you know , you just plug into a power source for a couple of hours , and then it's recharged for ages and ages and ages , and you don't have to worry with replacing A_A_ batteries ,