Spektrum DX6 protected 18650 holder

This is an replacement battery holder for the DX6 transmitter.
Instead of the four AA batteries two protected (longer) 18650 cells can be used.

To build this design you also need the following:
- Battery Springs made of wire (I took mine from an old TV remote control)
- JST-EHR 2 pin connector with cable
- 2x 18650 Lipo batteries with protection circuit (I have not tried shorter batteries without protection)