Lee
As you are aware many of my issues were due to power.
I have bought these items on Amazon and all appears to be OK.
Using these the PilotAware ran for a full 9 hours before the WiFI dropped out.
It is supplied with a short USB to micro lead.
Aukey Quick Charge 2.0 10000 mAh Dual-Port Portable External Battery Fast Charger (5V/1A + 5V/2.4A 9V/1.8A 12/V1.5A, 2.0A for iPhone and iPad, 2.4A for Android, Quick Charge Input and Output)-Black £16.99
PortaPow Specialised 30 cm 20AWG TPE Fast Charge with Data Block Micro USB Cable (Pack of 2) £6.99
Hope this helps.
Steve