A few of them are sealed, some have pop tops. The few I have opened are completely dry. My plan for the ones with removable caps I’m planning to fill with distilled water and test, then try to recondition them with a desulfator and see if I can detect any difference. never reconditioned batteries before so it’s going to be a learning process. Not sure what, if anything, I can do with the sealed ones, I’m focusing on the ones with caps first.