[rrussell1962]

I recently bought a Powertech portable power centre from Jaycar which I use with all my scopes (Obsession 18" and ServoCat, Nexstar 8SE, Vixen GPD with Skysensor 2000PC). Lithium ion, weighs not a lot, does for a whole evening slewing and eyepiece dew heater, 42 amp hours, 155 watt hours. Very quick recharge. Not exactly cheap but perfect for what I need. Added a couple of pictures with CD case for scale.