Xbox One controller 13400 battery

The main part of the design is straight from the design by SirRawThunderMan but with a different battery box to fit 2x 13400 batteries. It is smaller and fits behind the controller better with thumb tacks as the contacts instead of screws. Whole thing cost about £1 to make as most of it is recovered/recycled materials.
The reason for using a 1117-3.3 voltage regulator is that due to the way it works it drops the voltage of a fully charged cell by about 1.1-1.2 volts even if thats lower than the 3.3v it is meant to maintain. This means that the low voltage warning still works and the controller would have turned off well before the protection on the TP4056 kicks in. I've tested this on a 360 with the pack I made but the same should apply to a XBone controller.
Check out the version 2 and 3 redesigns I’ve done.

Parts list-

3D printed parts
6 x brass thumb tacks (4 if you reuse)
2 x M3 washers
1 x TP4056 battery charger with protection (eBay)
1 x 1117-3.3 voltage regulator (eBay)
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