PBs lipo packs are not the only way to get 5.9 volts, Duralite cells also work perfectly, use them in all my jets, with regulators or Powerbox. Lipos have serious safety issues, too, particularly on jets and they can react violently if a water fire extinguisher is used on them in the event of a crash. There are also some excellent 5 cell Nicads available from Horizon Hobbies in the US known as JR Extra packs, top quality Sanyo cells, I have used them a lot with 100% satisfaction. I use them with a regulator, either the Duralite which is set at 5.6 volts or the Mini Hobby unit set, I believe. at 5.5 volts, this latter unit having dual channels so if one fails the other will still feed the receiver. But from now on no large jet of mine will fly without a Powerbox having seen how it handles the 20 servos and hydraulic pump and ECU in the Mig 29.

Regards,

David Gladwin.