The perfect tester for quickly checking 6 and 12 V car and solar system batteries. With normal multimeters, it is difficult to determine the remaining capacity in lead/acid gel batteries under no load. This battery tester loads the battery at high current and measures the battery voltage under load. Batteries in poor condition will drop when measured under load, and can thus be identified within seconds. This portable tester is an indispensable tool for workshops, solar power systems, camping and many other applications.