Our MagMate magnetic-coupled USB chargers are designed specifically for the charging specs of our products and contain over-charging circuit protection. While some other magnetic chargers may look similar, our lights should only be charged with Nightstick-specific charger cables.  If you are in need of a replacement MagMate charger cable, contact our Customer Service Department M-F, 8a-5p CT at cs@nightstickshop.com