MiPow SP2600M-BK Power Tube 2600 mobile spare battery with Micro-USB adapter for mobile / smartphone / MP3 player / Navigation devices / PSP / NDS / Wii U black (Accessories) 5
MiPow SP2600M-BK Power Tube 2600 mobile spare battery with Micro-USB adapter for mobile / smartphone / MP3 player / Navigation devices / PSP / NDS / Wii U black (Accessories)
That part is really good, but might still have a little more steam. But it was also my choice, there is, after all, there are other, more powerful devices.