I was going to post this in off-topic, but it is GT related. I took the day off today from work just to relax. I was digging around a few part boxes I haven't been to in a while. I found a 13.8VDC 1.5 amp wall wart power supply and started thinking. I then found a Corsair Hair Clipper plastic storage case, and a couple panel meters. Didn't take long to construct a 1.5A trickle charger for the GT's batteries.