Hart 20v Battery Pinout Diagram May 2026

Hart 20V battery

The uses a 5-pin interface typical of modern lithium-ion power tool systems. While the pins are not always explicitly labeled on the casing, testing and teardowns identify them as follows: Hart 20V Battery Pinout Diagram Voltage Reading (to Negative) 1 + (Positive) Main power output ~20V (Fully Charged) 2 TH Thermistor (Temperature Monitor) ~20V (Connected to Positive) 3 ID Tool Identification/Data 4 C Control/Communication 5 - (Negative) Main ground/return 0V (Reference)

Voltage Logic

: While fully charged at 20V, some Hart tools (like vacuums or drills) use a specific "extra fat" positive pin for high-current applications. Lower-demand tools like fans may only utilize a subset of these pins. Hart 20v Battery Pinout Diagram

Pin 3 & Pin 4: Communication / ID

Adapters:

It is highly recommended to buy a 3D-printed or injection-molded battery adapter rather than soldering directly to the tabs. Hart 20V battery The uses a 5-pin interface

To verify the accuracy of these diagrams, I recommend cross-checking them with the following sources: Pin 3 & Pin 4: Communication / ID

Why the Hart 20V Battery Pinout Matters

Hart 20V Battery Pinout Diagram

| Pin # | Pin Name | Description | | --- | --- | --- | | 1 | B+ | Positive terminal (thick red wire) | | 2 | B- | Negative terminal (thick black wire) | | 3 | T | Thermistor (temperature sensor) | | 4 | ID | Identification pin (communicates with charger) | | 5 | P | Sense pin ( monitors battery voltage) |