How To Tell If A Battery Is Charged. How to tell if a battery charger is charging. When the battery is fully charged it will indicate around 6 amps.

In lieu of trickle charge some chargers apply a topping charge when the voltage drops. Now it is possible to overdischarge a battery well beyond its intended design. The needle may go down to zero 0.
When the battery is fully charged it will indicate around 6 amps.
If your multimeter is not autoranging set it to 20V DC. Drop each battery with the flat negative end down from a couple of inches up. However keep an eye on the battery voltage to avoid overcharging. Now it is possible to overdischarge a battery well beyond its intended design.
