Operation:
- current used in AH. Press to start Mode 1 testing.
- battery voltage. No testing, current voltage. Mode 1: open circuit voltage (no load). Mode 2: voltage under load. Press to start Mode 2 testing.
- final voltage. Testing stops at this voltage.
- discharge current in mA. 50-3500.
- internal resistan in Ω. Reported in Mode 1 with 4-wire harness.
Best reference:
Reverse engineered serial protocol: