Does Mercedes-Benz MB Star diagnostic SD Connect C4 come with built-in battery?
If you are using our SDConnect 4 clone, our software, you do not need a battery when carrying out Mercedes diagnosis or programming.
Our SD Connect Multiplexer does not have built-in battery.
When battery is needed?
1. Change new (newer or older version) DAS/XENTRY software HDD
2. Update SD C4 firmware
How to install MB SD Connect battery and WIFI card?
①— SDconnect multiplexer which need to input the batteries.
②— 6 units Ni-MH Rechargeable batteries，
Size：AA， Voltage：1.2V， Capacity：above 1700mA.
③— 1 unit 108M WIFI Card.
④— Plum screwdriver，Specification：T-20
Batteries can be easily purchased.
This is from obd tool website technical support: Does Star Diagnostic SD Connect 4 come with battery?