Mount this handy device somewhere on your model where it can be seen clearly and plug it into a spare channel on your receiver, if no channel is available then use a Y lead. This unit will give you a visual check of your Nimh or LiFe receiver battery each time you switch on. The easy to read series of LEDs will show you whether it is safe to carry on or if the battery requires charging.
Specs: Voltage Range: 4.8 - 6v Dimensions: 40x21x2.5mm Weight: 4g Lead Length: 320mm Plug: JR type