Mimoco, whose designer USB drives have established them in the geek community have announced their first SDCC exclusives for the year – MimoPowerTube Artist series. These are portable charging battery packs for mobile devices that feature cool decos by some fan favorite artists. Each PowerTube holds 2600mAh of power, that’s up to 1.5 charges depending on your phone. These chargers are a near essentially item for shows, particularly since having a low signal strength just chews through your battery. Artists featured include Sucklord, Andrea Kang, Marc Johns and others. Check them out below and you can pick on up at the show at Mimoco’s booths – #2913M and #5245.