I'll explain something. 1. There're some TPs on the black PCB in the first batch. It won't influence the function of ak2. It's for us to test the PCB. And of course, all the ak2.1 are tested before they're come out from factory. 2. We've removed the TP now because we found the fault rate of PCB is very low. I mean, we do not need some extra electronic tests anymore. 3. We have some old green PCB which has fixed fat error issue. And the sticker shows "ver 2.1" too. This version of ak2 is as same as new ak2.1. They are all good ones. 4. We've tested battery on ak2.1. A DSL used for around 6 months, 3 level brightness, medium volume. Run the intro of Castlevania: Portrait of Ruin? It takes 5.5 hours to turn red. 5. We have a very cool website for skins on ak2 and akrpg. http://skin.acekard.com Thank you for supporting Acekard.