NO SMOKING! Battery test and charging area
Testing lead-acid batteries
One of the best ways to determine the condition of a lead acid battery is to monitor the change in density of the sulphuric acid electrolyte as the cell charges using a hydrometer. This gives an accurate indication of the mass of lead participating in the chemical reaction on which the energy storage depends. Another useful test when time is limited is the heavy-discharge test, which simulates operating conditions.
The heavy-discharge test