Questions on Mobius mini camera use

[FMarvinS]

Hi all, the purpose of this post is to acquire info for the potential utilization of a Mobius mini camera mounted internally with an external shroud covering a partially external lens positioned at 15 to 20 degrees. Since the camera battery use is only good for 30 minutes, I was planning to use an external (to the camera body within the body tube) connected Lipo to extend the use of the camera. So I'd appreciate responses to the following questions from those with experience with the mobius mini:
1. Which reliable dealer that sells "genuine" mobius cameras have you been satisfied with since there are counterfeits in the market?
2. With an external Lipo, can one integrate a wifi switch or magnetic switch to turn on/off camera before flight. Can this on/off be repetitive without having the SD card rewritten?
3. Has anyone had experience with GPS reception interference from the Mobius and if so, have you attempted to use a Faraday cage over the camera body (particularly if you cannot further distance the camera from the GPS unit)?
4. For the external Lipo was a SBEC required to not surge above 5 volts, such as
https://hobbyking.com/en_us/turnigy...eCBhDPARIsAFDTLTKOrx12x8d1jmkXh5DtL0g5nDhOhV8

Thank you for your responses and any additional info will be fully appreciated.

Fred, L2
ICBM, Camden, S.C.
KG4YGP