How long do you hold the load switch on a battery load tester when conducting a test?

When conducting a test with a battery load tester, holding the load switch for a duration of 10 seconds is the recommended practice. This time frame is essential because it allows for an accurate assessment of the battery’s ability to provide the necessary current under load conditions. Holding the switch for too short a period may not give a true indication of the battery's performance or its state of health, as some batteries may exhibit voltage drops that stabilize over a short duration.

In contrast, holding the load switch for periods significantly longer than 10 seconds may risk overheating or damaging the battery or testing equipment, as continuous load can lead to excessive stress on both the battery and the tester. Therefore, 10 seconds is a balanced approach that maximizes the accuracy of the test without compromising safety or equipment integrity.