Battery products in Singapore customs clearance need product certification?

Required. According to the official website of Singapore Customs: battery products are controlled items and need product certification. Specifically, battery products need to comply with Singapore's safety standards and technical specifications, such as SS620:2016, SS283:2013 and so on. International certifications such as CE marking or UL marking are also required. If the battery products are not certified, they will not be able to pass the customs clearance in Singapore.