Looking online there could be a special provision for sealed lead acid wet batteries... but do your research, the costs of shipping etc will come from the UN tested packaging, correct labelling and your shipping costs may be higher if deemed as DG... the special provision (if applicable) may be helpful to ease the shipment along. The manufacturer should be well versed in sending batteries so should know their obligations. As a guide by google'ing look up "Special Provision A67" - but remember please, I have been DG trained around 20 odd years ago to just appreciate what my neighbouring expert team were doing... seek proper advice. If they're a different type of battery the above special provision wouldn't apply.