For Mike D, or one of several others who have been inside our battery packs: So what is the answer; are the batteries user-replaceable or not? It appears the Panasonic HHR650D is the right one, and is available for purchase (x120). I have read the previous threads and photos of you guys taking apart the pack. But I have never heard a difinitive answer? Can we remove the old sticks of batteries, then solder or weld new ones together to make new sticks, install them and leave all other components as is, and drive away??