DealExtreme claims, that is 30 000 mAh battery but it is only 3 000 mAh and it cost 20$. http://www.dx.com/p/universal-portable-5v-30000mah-li-ion-battery-dual-usb-solar-powered-power-bank-w-led-i...
http://bit.ly/1j1KFpX - Learn how to drastically reduce your energy usage here.
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