We added a 3-LED on-board battery checker to our best selling Soft Mount One-Piece Charge Switch. The three LEDs - green, yellow, & red - monitor the status of Rx pack under actual load. Specifically designed for 7.4 volt LiPoly/Li-ion cells w/ genuine Dean's plugs, it also features dual universal plugs for improved current to your RX.
The switch is factory preset to 7.4v applications. For 6.6v (A123) simply cut the jumper loop on the back of the switch and seal the wires with silicone glue or tape.
Do not apply voltage higher than 8v as it will damage the unit.
Mounting cut-off area for this switch is 1.3" x 0.5".