Ok, bumping this back because I want to make sure I'm not going to screw up my computer power adapter...
I get that they'll lose charge fairly quickly, I can live with that now that I know, but last night I was charging up the Valence and it caused my Apple power adapter (the white box part that plugs into the wall or the extension cord) to heat up so much you couldn't hold on to it and this made it stop working momentarily. I unplugged it, cooled it down and it worked again after that. I finished charging the valence with the power adapter between two ice packs.
Seriously...is this what it's going to be? Is it something specific to the mac that's doing this? Is there nothing that might work better for me?
Thanks for the help so far...just don't like having to use ice packs when I charge a battery.