Reliable battery power in your R/C aircraft is absolutely critical. A loss of power to the radio in flight means a loss of the aircraft, no way around it. But almost as important is how the power supply performs. There are lots of odd behaviors that can be traced back to weak or inconsistent power. Nothing changes the personality of a plane quite as quickly as a good power system.

Wild Hare sells and recommends only A123 lithium battery packs to power your receiver, servos, and ignition. A123s are safe, reliable, and they provide massive amounts of power on demand so that your receiver and servos can work at peak efficience in all conditions. Their 6.6 volt operating voltage means that you don't need or want to use regulators, a component that can cause problems and which is expensive.

We have two sizes of packs, 1300mah and 2300mah. Each pack comes with two leads, a 12" heavy duty lead with a Deans Ultra connector and a lighter duty lead that can be used to power lighter loads and also for balancing. This lead is often used to power the ignition.

A drawing of the balance connector is shown below, the wire labeles "+3.3v" is the balance wire. It is a good idea when using this lead for power (as when used to power an ignition module) to use only 2 wires to connect only the ground (0v) and power (+6.6v) since it is unknown how the powered device will react to power on the third wire.

Our nice little charger can charge A123 plus Lipo/Li-Ion, NICD and NIMH, and also lead acid batteries. It includes a set of adapter cables that allow hookup to almost any bettery pack. It even includes a temperature sensor which allows the charger to sense the temperature of the pack it is charging. An adapter for balanced charging of our A123 packs is also included. 

For more information on A123 batteries and how to work with them, see these two write-ups;

Care and handling of A123 batteries

Introduction to A123 batteries