Yep, that's what I was thinking.
Any idea of how often you have to refresh the thing to keep it charged up?
Yep, that's what I was thinking.450 should be fine. The battery booster pack is better then jumper cables because if no one else is around what are you going to hook the other end of the cables to?
Yes, skycokid, I believe the unit at Sam's is a Stanley.I have and have used this exact (Stanley right?) model for the past two years or so - couldn't be more pleased. I only charged it twice but it never really got weak on me. i recharged it just to be safe. It jump started my DEAD truck battery a half a dozen times earler this summer with no problems whatsoever. Very strong unit. I also use this unit to inflate my kids bike tires and my riding mower tires. i no longer keep jumpers in my truck and this thing lays flat in the under rear seat tray.
Sam's had a 350 unit for $5 cheaper but the extra money is a no brainer for the 450.