Light and Motion 6-Cell Battery. Offered in multiple cell counts to match your riding style Light and Motion Batteries are suited for external battery lights such as the Seca Imjin and Stella series.Due to various DOT requirements for shipping Li-ion batteries light sets powered by lithium-ion batteries can be shipped by air in boxes weighing less than 5kg (11lbs) (Replacement lithium-ion batteries NOT included as part of a light set can be shipped via ground only)