Most batteries are sealed, so you can not reach the individual cells.
Some you will see the connections between the cells like the ones in the following picture:
Question when person take a battery to auto parts store sale person test the battery .
How is the tester at auto parts store work is it load the battery down.?
mrel
Question when person take a battery to auto parts store sale person test the battery .
How is the tester at auto parts store work is it load the battery down.?
As already pointed out, there is no need to test each cell and even so, the connections are no longer brought out.
Therefore an overall series load test does the job.