On my Reaction I am using two 5 cell 1800mah Ni-Mh NoBs batteries with two switches into the Rx with Y's and no regulator. I've flown five flights and still was in the 6.20 - 6.30V range with a load. I had the kero start on my P-60 but have since changed it out after it failed on the twentieth start(Jetcat sent me a new one under warranty) not to mention the current it sucks out, the 60 + seconds it takes to start the engine and the flames that come out during start up. I put a 3300 Ni- Mh pack up front for the ECU. Could probably get seven starts with it but I charge it after four. You need nose weight up front with the R54 anyway so it's no problem stuffing all these batteries up there.

Marty