So I was able to warranty a 2yo Everstart Maxx H5 made by JCI. The replacement H5 is now made in Korea and is rated 600cca vs 650cca for the old JCI H5. So who makes these?? This is the first time I've seen the Korean made batteries here in SoCal. I took a peek at a few other batteries and they were all JCI as they've always been. Serial number starts with HSW.