Batt Four Li-ion Powerbank
thingiverse
I have uploaded a new version from the 6th battery box, follow the pictures and instructions from the batt 6 box: http://www.thingiverse.com/thing:1638771 The photo is courtesy of Laurence Curnow for providing it. This simple battery box uses a laptop battery (four batteries inside) and one USB port with a charger, along with an LCD monitor that displays the state of charge and battery protection. It's suitable for 3.7v 18650 batteries. It was designed to be permanently fixed using superglue (other adhesives can also be used). You may need to sand it and fit it properly. When soldering, take care not to melt the plastic on the positive side of the battery, and limit your time when soldering to the battery. The buttons aren't easy to print; try printing four or eight at a time and they will cool down faster before moving on to the next layer. The electronics components can be found at http://www.ebay.co.uk/itm/221616408651?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT I've mixed the dragon yinyan design from http://www.thingiverse.com/thing:847238
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