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They put in a ACDelco 48GHR "flooded" type unit. I didn't know about AGM's at the time, now I'm worried that a AGM was mandatory and this one could cause harm. It's been in a month so far, do I need to replace it with an AGM type?
Even though the flooded battery might be fine, I would consider the car warranty. If something were to go wrong with the electrical system and you brought the car to Hyundai for warranty service would they deny service because of the out-of-spec battery? I don't know, but it seems possible and personally, I wouldn't expose myself to that - just my 2 cents. Good luck and let us know how it goes.
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