Hart 20v Battery Pinout Diagram Better

When testing with a multimeter, these are the expected voltage readings between terminals on a healthy, charged battery: Terminal Pair Expected Voltage (Approx.) 18V – 20.5V (+) to TH (-) to TH (+) to ID (-) to ID (-) to C

If you simply connect a wire from Positive (+) to Negative (-) to run a light or motor, nothing will happen. This is because Hart batteries (and most modern lithium packs) have a Battery Management System (BMS) inside. The BMS cuts power if it doesn't detect a valid tool connection to prevent short circuits. hart 20v battery pinout diagram better