– is Negative terminal
+ is Positive terminal
ID is for tool to identify the battery
TH is Thermistor for temperature monitoring
C1 to C4 is junction between cell groups (for balancing)
Black and Decker 20V Battery Interface & Pinout Wiring Diagram
+ and – = 20v
+ and TH = 20v
– and TH = 0V
+ and ID = 20V
– and ID = 0V
– and C4 = 4v
– and C3 = 8V
– and C2 = 12V
– and C1 = 16V
– and TH = 10 KΩ (25 °C), ~8 KΩ (Current Temp)
+ and TH = 0 Ω
– and ID = ~3.9 KΩ
+ and ID = 0 Ω
