Hi all,
Here's my attempt at an internal lithium battery, charge port, indicator LEDs and charged/charging LEDs.

The two LEDs above the neck strap point are top charged (green) and bottom charging (red). I attached a prototype PCB from a portable hand held 'appliance' from where i work, hooked into that charging circuit, wired in all the LEDs to pads that were for surface mount LEDs, and also have a charge jack on the rear. All tested and working fine. The power is regulated once it enters the PCB so the 7.4V provided by the li-ion battery is ok, regulated to 3.3V i think (all the points i probed were 3.3V anyway). I needed to solder my PCB switch to the Phantom TX power switch, my PCB switch switches the positive but the Phantom on/off switch switches the negative so i couldn't turn on my PCB using the Phantom on/off switch. So i found a positive voltage that was switched on and off via the Phantom switching on and off, then wired my switch to that one point, which was off a large Capacitor on the under side of the Phantom TX PCB.
Anyway just thought i'd show you all my efforts
Regards
Here's my attempt at an internal lithium battery, charge port, indicator LEDs and charged/charging LEDs.

The two LEDs above the neck strap point are top charged (green) and bottom charging (red). I attached a prototype PCB from a portable hand held 'appliance' from where i work, hooked into that charging circuit, wired in all the LEDs to pads that were for surface mount LEDs, and also have a charge jack on the rear. All tested and working fine. The power is regulated once it enters the PCB so the 7.4V provided by the li-ion battery is ok, regulated to 3.3V i think (all the points i probed were 3.3V anyway). I needed to solder my PCB switch to the Phantom TX power switch, my PCB switch switches the positive but the Phantom on/off switch switches the negative so i couldn't turn on my PCB using the Phantom on/off switch. So i found a positive voltage that was switched on and off via the Phantom switching on and off, then wired my switch to that one point, which was off a large Capacitor on the under side of the Phantom TX PCB.
Anyway just thought i'd show you all my efforts

Regards