well, the newer versions of the battery will include a monitor (the HD version). in the meantime, we have purchased a solar USB charger that we always attach to the goggles while flying. they can be double-side-taped to the battery box itself. Keeps the goggles full all the time.
second mod we have done is use RJ45 connectors from the ground station to the goggles. We use a 5V BEC on two of the lines of the RJ45, and feed that directly to the USB socket (at the inside). this simulates a constant charging circuit. Plug in the RJ45, you get video and instant charging. pretty neat
