I'm very close to buying the following equipment...
Fatshark Base Goggles (6-12V)
X-1000 Head Tracker (8-12V)
5.8Ghz receiver (already ordered this bit, and just noticed it's 5v)
A 3S lipo seems easy, but they are 12.6V fully charged. Should I get some kind of voltage regulator? Are there ones that will bring 11.4V (for example) up to 12V? Any suggestions for the receiver? A ubec?