Hart - 20v Battery Pinout Diagram

Used for temperature monitoring to prevent overheating during use or charging.

Allows the tool or charger to identify the battery type and capacity. Hart 20v Battery Pinout Diagram

For those troubleshooting or building Battery Adapters , standard voltage readings between pins (at full charge) are as follows: Pin Connection Voltage Reading ~20V (18V nominal) Main power supply (+) to TH High-side temperature monitor (-) to TH Ground reference for thermal sensing (-) to ID Ground reference for ID resistor (-) to C Control signal path Internal Balanced Charging Pins Hart 20v Battery Pinout Diagram

If your battery flashes specific patterns on its Built-in Fuel Gauge , it may indicate a temperature out-of-range error or a permanent cell failure. Hart 20v Battery Pinout Diagram