Hart 20v Battery Pinout Diagram Better 'link' -

These intermediate contact points allow the charger to monitor individual cell voltages (e.g., ~4V, ~8V, ~12V, and ~16V increments) to ensure all cells stay balanced.

If your charger is flashing a red "defective" light, you can use a multimeter to check the voltage between the and (-) pins. Healthy: 16V to 20V. hart 20v battery pinout diagram better

For advanced repairs or DIY charging, some models feature internal contact points (labeled C1 through C4) that represent the individual cell banks in the 5S (5 series) configuration: Usage Notes for DIY Adapters Simple Power These intermediate contact points allow the charger to

The phrase is confusing. It’s unclear whether the user is: rubbing his temples.

"Talking?" Ben asked, rubbing his temples.