Pinout Diagram ~upd~ - Hart 20v Battery

A standout feature of the Hart 20V battery pinout integration of dedicated temperature and balanced charging contacts

Compatibility: Hart 20V batteries are part of the TTI group, which also includes brands like Ryobi and Milwaukee, though they are not natively interchangeable without specific aftermarket adapters.

that refused to cooperate. Determined to revive it, Max pulled out a multimeter to map the secrets hidden within its five-pin connector. The Five Pillars of Power Hart 20v Battery Pinout Diagram

Internally, larger HART batteries (like the 5S2P 4.0Ah models) may have additional contact points labeled C1, C2, C3, and C4 . These are used for balanced charging

Internal Schematic (Simplified)

[B+ (T1)] ----[Cell 5+]
                 |
              [Cell Group]
                 |
[B- (T5)] ----[Cell 1-] ----+
                            |
[T3 (ID)] ------------------+ (resistor to B-)
                            |
[T2 (Thermistor)] -----[NTC]----+
                            |
                          [B-]

Standard Pinout Configuration (Left to Right): A standout feature of the Hart 20V battery

How to Identify Pins Without a Diagram

If you have a multimeter but no diagram:

Hart 20V batteries (the white and black series sold primarily at Walmart) are part of the TTI family. They share a very similar platform with Ryobi 18V One+ tools, though the physical battery stalks are different. Standard Pinout Configuration (Left to Right): How to

How to Identify Your Hart Battery’s Pinout Without a Diagram

If you have a multimeter and a Hart battery of unknown revision: