These heavy-gauge outer terminals handle all heavy load transmission. Fully charged, the potential difference across B+ and B- peaks at and stabilizes at 18V nominal under load. When making customized power docks, these are the only two pins required to draw raw current to power 12V–24V DC motors, pure resistive loads, or buck converters. Thermal Protection: The TH Pin
If your HART battery won't charge or run a tool: hart 20v battery pinout diagram better
Use this layout only as a conceptual reference; always verify with measurements and documentation for your exact pack. These heavy-gauge outer terminals handle all heavy load
Avoid using this phrase. Instead, search for “Hart 20V battery terminal identification” or open the battery and trace pins with a multimeter. If existing diagrams are wrong, describe the error — don’t just ask for “better.” Thermal Protection: The TH Pin If your HART
While it's theoretically possible to rebuild a Hart battery by replacing the internal 18650 cells, it's for safety and warranty reasons. Lithium-ion batteries are volatile and sensitive to soldering heat, and a proper rebuild requires a spot welder for nickel strips—not a soldering iron. The internal BMS also locks onto a specific cell configuration. Given Hart's budget-friendly pricing ($40 for a 1.5Ah battery), replacement is almost always the safer, more cost-effective option.
When looking directly at the interface slot of a standard Hart 20V battery, the five connection terminals are structured to handle distinct electrical and monitoring pathways: