Whether thermometers and separately packed AAA alkaline batteries are classified as non-hazardous goods for ocean freight

I am planning to purchase thermometers from Korea. Since the quantity is over 500 units, the amount of free AAA alkaline batteries provided is also quite large. Therefore, the Korean exporter intends to pack the AAA alkaline batteries separately in one box. We plan to proceed via ocean freight, and I have already confirmed that dry batteries can be shipped as non-hazardous goods if they are packed to prevent short circuits. However, that information seemed to apply to cases where batteries are included within the product. I am wondering if shipping the products and batteries separately in this manner is also recognized as non-hazardous, and if there are any specific packaging methods that must be followed.