2016Batteries/Power forum
Troubleshooting non-responsive charging stations on AB TM-4 battery charger
What the thread found
- Charging station failure showing constant red light without blinking can indicate a defective circuit board requiring full board replacement
- Dirty or corroded charger pins can cause communication failures between charger and battery and should be cleaned with an eraser
- Some older AB charger models have a rear-mounted switch that can accidentally be set to camera mode instead of charge mode, disabling charging stations
- Ritter Battery provides repair services for AB chargers and is considered a faster and more affordable alternative to manufacturer service
Depends on
- The camera/charge switch solution does not apply to the TM-4 model specifically
- Board replacement repair costs may exceed the price of purchasing a used replacement unit
- The exact failure mechanism for the reported issue was never definitively confirmed in this thread