Battery Pinout Diagram Better Free — Hart 20v

: The main high-power output terminal, located on the far right. This terminal provides the full ~20V (18V nominal) to the tool. TH (Thermistor)

The Hart 20V battery typically features a 5-pin layout designed for power delivery, safety monitoring, and balanced charging. Pinout Configuration hart 20v battery pinout diagram better

| Terminal Label | Function | Voltage to B- (Idle) | Critical Note | | :--- | :--- | :--- | :--- | | | Positive Rail | ~20V (18.5V nominal) | Never short to B- | | B- | Ground | 0V | Common reference point | | T | Temperature Sense | ~1.5V - 2.8V (varies) | If grounded, the charger faults. | | C | Clock Signal | ~3.3V (Pulsing) | Logic level voltage | | D | Data Signal | ~3.3V (Pulsing) | Carries battery health/cycle count | : The main high-power output terminal, located on

: Many Hart tools have a "fat" positive pin that interacts with the battery's internal BMS (Battery Management System) to cut power when voltage drops too low (often around 16V). Jump Starting Pinout Configuration | Terminal Label | Function |

A standard pinout diagram shows you where the holes are. A explains the behavior of those terminals.