Quote:
Originally Posted by Al Skierkiewicz
Battery Testers of this type http://www.mcmaster.com/#battery-testers/=o19fra use high current loads, 60 and 125 amps or simply 125 amps and produces a meter deflection to show good or bad. A car battery (.003 ohm) has an internal resistance typically 1/4 of our battery (.011 ohm) so this tester will not give you a good idea of the state of the smaller battery. I cringe at teams that use this battery tester as it will continue to load the battery as long as the switch is held "on" which under certain conditions can damage the battery. |
As long as the switch is not held in the "on" position for too long there is no risk to damaging the battery since it does not put any more of a load on it than does use in a high current demand FRC robot.
I wouldn't recommend using it on a daily basis but at the beginning of the season or before heading to competition is not a bad idea.