Hart 20v Battery Pinout Diagram May 2026

For those troubleshooting or building Battery Adapters , standard voltage readings between pins (at full charge) are as follows: Pin Connection Voltage Reading ~20V (18V nominal) Main power supply (+) to TH High-side temperature monitor (-) to TH Ground reference for thermal sensing (-) to ID Ground reference for ID resistor (-) to C Control signal path Internal Balanced Charging Pins

When using these for DIY projects, always include an inline fuse. For example, Power Wheels Adapters often come with 30A fuses to protect the battery cells from over-current damage. Hart 20v Battery Pinout Diagram

Used for temperature monitoring to prevent overheating during use or charging. For those troubleshooting or building Battery Adapters ,

Allows the tool or charger to identify the battery type and capacity. Allows the tool or charger to identify the

A communication or control pin often used for low-voltage protection or signaling.