SKYRC introduces the POWER SWITCH, a tiny MCU controlled on/off switch for your radio controlled model. A simple push button operates the switch meaning to eliminate theproblems associated with intermittent contact of an ordinary mechanical switch.The sealed unit is plastic and can easily be mounted to the transponder mount of your model or anywhere else you can mount it using double side tape. (Two kinds of bottom covers are included, user can change the bottom cover.) The switch also features a LiPo mode, by turning this on the switch unit will auto detect low LiPo voltage and cut off power to protect your LiPo from over dis-charging. This of course can be turn off if you have other safeguards in place or using NiMH/NiCad battery. Beside that the power switch informs you about the remaining capacity and conditions of your battery pack.

http://www.rcinnovations.co.nz/switches/1838-skyrc-power-switch.html