MY EXPERIENCE W/ THE "NOT CHARGING ISSUE AND HOW I FIXED IT":
I have a total of 7 active basses. Two of the basses are Sire Marcus Millers. I have been through a total of 4 G10T transmitters, all 3 of which have stopped charging over time. During the time I was using these 3 transmitters I narrowed the problem down to using my two Sire basses. There was something about these two basses that was killing the G10T transmitter. I took some time to dredge up some of my old Electronic Test Engineering skills and ran a couple of tests that proved that the two Sire basses were sending an 18.00 volt pulse across the guitars output jack whenever you plugged or unplugged your cable. So I took a couple of my other basses apart (Fender/Sadowsky, Carvin, MusicMan). What I found was with the other basses the Switchcraft jack that was installed had a separate battery voltage switch. On the Sire basses the same part was a cheaper component which sent the battery current through the jack while the plug is being inserted.
I researched and found the same Switchcraft (Digikey) part that was being used in the Carvin bass. (I will provide pictures and part numbers). I removed the old jack and installed the new one. This fixed the problem.
How to test:
Take a cable, and at one end put your voltmeter, then slide the other end of the cable slowly into the guitar. If at any point you see + or - volts on the meter, you need to change the jack to (Switchcraft Part # (TBD)).
Post your results.