Battery Gauge eZeebike
This is a component on eZeebikes and eZee conversion kits. It's the part that shows the voltage of the battery through a green, yellow and red LED light. Green light means a fresh battery, red means an almost empty battery. While under load, such as when motoring up a hill, the light will probably drop to the lower colour (from green to yellow for example) but may recover when you stop using the motor. This is normal behaviour of these kind of battery gauges as they are simply testing the voltage of the battery, which will dip under load as well as when it is nearly depleted.
The battery gauge is connected directly to the controllor. The front light, e-brake levers and throttle or EAF are all connected to the battery gauge. The e-brake levers and light are connected internally (the connections are inside the battery gauge) whereas the throttle or EAF is connected externally (the 5 pin connection is on the end of a cable coming out of the battery gauge).
The battery gauge also has the light switch on it. There is a PCB (printed circuit board) inside with a few things going on such as:
- the light wires come in here to be switched and then soldered onto the PCB
- the e-brake levers are connected to sockets on the PCB. They are also glued in but are still removable with some care
- the throttle signal passes through the PCB back to the controllor.
If the battery gauge is faulty then the whole bike can stop working. Opening the battery gauge can be done with a small phillips head screwdriver and is required to change e-brake levers if the fault is the electrical part of the e-brake levers (that is to say, if you are just changing levers because of some mechanical problem in the brake levers you won't need to be opening up the battery gauge).
To replace the battery gauge you need:
- small side cutters
- screwdrivers, allen keys and 8mm and 10mm spanner
- heat shrink and heat gun to seal up connections you have opened
- cable ties
- soldering ability to reconnect the front light, either onto the front light's terminals or by cutting and reconnecting somewhere on the wire between the front light and battery gauge.
- a bit of time, care and patience. Pay particular attention to how the wires are arranged around the handlebar area before you remove cable ties and cable wrapping so that you can put it back together neatly. It takes around an hour if you have everything you need and know what you are doing. This is not a user-replaceable part, it is normally done by a dealer.
