Building a DIY powerbank with LCD indicator for $3,50

A bought a powerbank case from Ebay which could be fitted with four 18650 batteries for about $3,50. I had an old laptop battery laying around, so I salvaged eight 18650-batteries from it and they were surprisingly good. So in this video you'll see me building this powerbank and putting it to a small test. The Ebay-listing: http://www.ebay.com/itm/302079953660 Music used: "Jaunty Gumption" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/