Yeah, the battery he shows in the picture is a sealed Lead Acid battery.

I have one of those Sears emergency car jumper battery packs very similar to the one shown in the picture. It comes complete with a charger (115vac) and two output jacks.. and I added a third one. One of the output's is a fused 'cigarette lighter' type of jack. The other two are wired directly to the battery terminals and are not fused.

The charger uses a plug in similar to a wall plug.. I simply plug the short extension into the side of the plastic package and a red light comes on. When it's done, the red light turns green and i'm ready to go. It usually sits on there overnight the day before I go flying and it's good to go. It becomes a routine.. RX battery on charger, TX battery on charge, Glow Driver on charge, and the starter battery (the one that is the main subject of this reply) gets plugged in. All are ready the next morning... well, hopefully that is...

CGr