Hart 20v Battery Pinout Diagram

Looking at the battery with the "stem" or connector rail facing you (terminals pointing up), the layout generally follows this order:

The main power output. When measured against the negative terminal, it should show approximately 20V on a charged pack. Negative (-): The main ground/return path for current. Hart 20v Battery Pinout Diagram

Helps the tool or charger recognize the specific battery pack, which can prevent "unknown" or incompatible packs from being charged. C (Control): Looking at the battery with the "stem" or

Most HART 20V battery packs (models like HGB20, HGB40, HGB60, HGB80) have on the top mounting rail. The common mistake is assuming only the large outer slots (positive and negative) matter. In reality, the inner smaller pins are the brains of the operation. Hart 20v Battery Pinout Diagram