This can be found by measuring the output voltage. If it’s contant 50.4 it’s probably a trickle charger. If it turns on and off endlessly (while not connected to a battery), it’s probably a float charger. Trickle chargers will balance a pack faster but float chargers are better to keep plugged in all the time. Trickle are better to unplug a few hours after full charge is achieved.
2 Likes