A customer, Sherry Foster, has filed suit in New York District court against Skechers, claiming that the batteries in her son's S-Lights sneakers leaked and gave him second-degree burns. She is attempting to gain class certification for all buyers of footwear containing Ni-Cad batteries since Nov. 7, 2015. The suit alleges that such batteries can burst if their gas vent is blocked or if they get wet and rust. It is seeking strict liability for a design flaw, failure to warn and other charges. Though the company formerly stated on its website that S-Lights contain no harmful products, Skechers has begun including battery-care instructions with its shoes.