Comment If size is not an issue (Score 1) 771
AA batteries, AAA batteries are just fine as a backup option. Amateur radio equipment leaves this open. As well as rechargeable. Hell, i have rechargeable AA energizers. Stop changing shit for the sake of it. If you want a glass iPhone 8 the thickness of a cracker, ok cool. I don't though.... i have both a Bluetooth sound system and an 8 track player. Knock it off