It can be tiring to have to constantly jumpstart and recharge your car’s battery. If the battery’s voltage reads fine at 12.4 to 12.5 volts and is charged but has trouble starting the next day, you can test the car’s battery health. This can usually be completed with a battery analyzer, refractometer, and a multimeter. If the battery’s condition passes as useable, then you can test the charging system and for a parasitic draw. This article mostly explains how to test the car’s internal battery health with a refractometer.
