Shipped from Abroad.
tells you both the voltage of a battery and how much capacity it has.
Connecting a battery tester to the positive and negative terminals of a battery will give you a voltage reading first. The tester runs a diagnostic test on the battery by putting a load on it to determine how much capacity it has. Once the diagnosis is complete, the tester displays whether the battery is healthy or if it needs to be replaced. It also displays how much capacity the battery still has, as a percentage, compared to the specifications of a healthy new battery.