There are a ton of different kinds of hearing aids. They can be broken down into various categories, the first of which is rechargeable vs battery-powered. This is a pretty obvious one - rechargeable hearing aids can be plugged into the wall or your computer and juiced up overnight. They may even come with a charging case, so if they ever run out on the go, you have a quick back up plan.Battery-powered hearing aids, however, need a steady flow of disposable batteries in order to do...