A battery hydrometer measures the specific gravity/relative density of battery acid to test the state-of-charge. It features a siphon set that collects battery acid as a sample for measurement ranging from 1.150 to 1.300.
A battery hydrometer measures the specific gravity/relative density of battery acid to test the state-of-charge. It features a siphon set that collects battery acid as a sample for measurement ranging from 1.150 to 1.300.