Hi,
Iv'e noticed you can get this 10,000mAh (5V) power banks pretty cheap:
http://www.banggood.com/Original-XIAOMI-5_1V-2_1A-10000mAh-Power-Bank-For-Smartphone-p-977406.html?utmid=57
(Will be 11.99$ in a promotion next week).
Why not get a bunch of them (They also weigh only ~200gr a pack) and use them to power our boards?
EDIT: I believe there are 4 batteries like these inside:
http://www.dx.com/p/lg-lgabb41865-18650-2600mah-rechargeable-battery-grey-317674#.VeTgIFWqqko
Iv'e noticed you can get this 10,000mAh (5V) power banks pretty cheap:
http://www.banggood.com/Original-XIAOMI-5_1V-2_1A-10000mAh-Power-Bank-For-Smartphone-p-977406.html?utmid=57
(Will be 11.99$ in a promotion next week).
Why not get a bunch of them (They also weigh only ~200gr a pack) and use them to power our boards?
EDIT: I believe there are 4 batteries like these inside:
http://www.dx.com/p/lg-lgabb41865-18650-2600mah-rechargeable-battery-grey-317674#.VeTgIFWqqko