Being new to gas, I never experienced any of the legacy NiCd or NiMH cell failing issues and am very comfortable with LiPo and LiFe reliability so I didn't think twice about combining power source for both receiver and ignition. I use the TechAero Ultra IBEC in all my gas planes, powered by LiFe packs. In 2 planes, I have the Spektrum PowerSafe receiver which supports dual power sources for both redundancy and the added benefit of extending the run time via parallel operation. Works great!