HPI Battery Level Indicator
Now this is a cool little gizmo, simple and easy to use and essential for all those non racers out there who just want to drive their car, in this case a HPI, and have fun. Its a battery meter that gives you an indication of the power left in the receiver battery when you turn your car on. Your transmitter has a meter to tell you when it needs charging so it seems pretty natural that your car should have one too and if it prevents a Savage tearing off into a crowd of girl guides, or other random targets, then that can only be a good thing. Good thinking from the guys at HPI.
Source: HPI [hpi-europe.com]