For testing complete range of 12v automative batteries from 35Ah to 200Ah.
Timer automatic (5sec.) .
The testers have a built-in circuit, which senses the drop in battery voltage under load as the discharging current is very high and indicates if the battery is sufficiently charged, weak or dead, by means of 3 colored lead's.
Judgement: on meter green segment shows ok, Yellow segment shows weak and red segment shows bed status.
Feature : such tester is able to check the whole battery condition with the help of digital meter.