theizzardking
New member
A lot of battery testers do not work very well. I've used testers at bmw dealerships that would do the same thing, They test ok but the battery doesnt hold charge. The problem is the tester doesn't actually put enough load on the battery. I use to just turn the lights on for about 20 seconds before testing it and then it would fail the test completely. I recently had my battery warrantied at autozone and it tested good even though it only had like 1-2 cranks before it would die. after a whole day of charging and testing it finally failed there test and i got there duralast gold which actually seems to be a.decent battery so far. I also never get the recommended size. I try to always get a bigger more cca battery that i can fit reasonably.
here
Inspecting & testing a battery
there's more to testing a battery then a load test, your not checking each cell when hooking up to their load machine make them do a gravity/float test on the cells, they should be able to do this as well, the local shucks and such has done it for me in the past as well.