I wonder what James May would have to say about supposedly intelligent people who are incapable of topping up a battery:
'When people say, "Oh, I'm so impractical. I can't even wire a plug", because they think that makes them sound more intellectual, I think, "No, that means you're thick, because the instructions are on the plug and if you can't do that, you are a moron. Then people say, "I'm very technically minded, but I don't know anything about writing and I can't do punctuation." I think, "No, you're just thick, because those things are quite simple." I'm sure people with properly developed brains can do a bit of both.'
Perhaps googling 'how to top up a car battery' might be a good start if your not sure on how to do it.
Just to edit from what I can make out the only difference between a sealed and non sealed is the style of the stopper. Sealed batteries still need topping up if the charging method over gasses the electrolyte.