Hart 20v Battery Pinout Diagram Better [new] Jun 2026

Then, he opened the attachment from sketchy_tech_guy_99 .

Identifying pins on a Hart 20V pack (practical method) hart 20v battery pinout diagram better

: For advanced repairs, internal contact points (C1-C4) exist inside the casing for balanced charging of the individual 3.6V–4V cells. Then, he opened the attachment from sketchy_tech_guy_99

Use this as a reference — match shapes and labels on your specific pack before wiring. : The TH (Thermistor) pin is a 10kOhm sensor connected to B+

: The TH (Thermistor) pin is a 10kOhm sensor connected to B+. If the battery is too hot or too cold, the charger will refuse to start, and the tool may shut down automatically to protect the hardware.

Used for temperature monitoring . This pin connects to an internal thermal sensor to prevent charging or operation if the battery is too hot or cold.

When testing your battery with a multimeter, expect the following readings when measuring against the terminal: Expected Voltage (approx.) (+) Positive 18V – 20V Main Power Output TH 0V (Grounded) Temperature Safety ID 0V (Grounded) Pack Identification C1 1st Cell Balance C2 2nd Cell Balance C3 3rd Cell Balance C4 4th Cell Balance Troubleshooting & Maintenance