Surprisingly quite a few batteries used in small applications are coming from Vietnam. The 12 v 7 amp batteries I got about 2 years ago were about $12 each, but now run about $18.
APC is sourcing their VRLAs and small format AGMs from Vietnam, and I think more motorcycle batteries are coming from there as well. Korea is now the world's largest lead smelter and not suprisingly to keep costs down, Hyundai has been bringing over Korean batteries for their plants in the US. JCI(or whatever it will be called) does have a plant in Korea using the old Delco sealed top cover design.