I am setting up my 88" EF Yak on one A123 2300 pack for the receiver. I haven't had any capacity problems flying a 87" EF yak on 3 Thunder Power 1320Mah LiPo's (2 Receiver, 1 Ignition). After 6 15min. flights both receiver batteries will use about 600 Mah each and the ignition about 500 Mah. I'm not comfortable using a single mechanical switch, so I called fromeco and had a pin flag badger switch built with 16ga w/ Deans in and dual receiver leads out.
A123=simplicity=no regs=
Charles