Hart Battery Not Charging - Flashing Red Light
My 20V hart battery flashes red when it’s not healthy and won’t charge.
I know for hart charger, it is normal for it to start blink red for a while before start charging.
But, in my case, the hart charger would just stuck at the red light blinking pattern and won't enter the charging process.
Sometimes this even happen on new hart battery and it just simply won't charge.
To solve this, I jump-start it using another similar 20V hart battery.
I connect their terminals for 15 seconds, then recharge the bad hart battery.
The blinking green light on the hart charger tells me the charging is back to normal.