Finally found this thread again. Guess it did not have the search words I had been trying?The Antigravity XP-1 really looks like an awesome little pack. Small enough to stow under the back seat, or in a glove box. Reports say it will stay charged for up to a year.I picked up one of the Antigravity Batteries MICRO-START/PPS XP-1 on Amazon for $144 shipped. I will say that the video did help sell it:I had seen this thread and another on the lithium battery booster packs, but lost track of them. The whole idea stuck with me and when a little mad money showed up, I bit the bullet. I had been wanting to experiment with a pack like this and see if the solar panels work well in conjunction. At the very least this will be much more convenient to carry as a back up plan. It also gives be the ability to carry it along on the motorcycles too. I like that ideaThe "kit" really looks great. It will adapt to virtually anything. The size is fantastic. It fits right into the pocket on the solar panel bagI will play with it a while and see how it pans out for me. Thus far (rose color glasses on) I like it!