XTAR WP2 II Charger Newest Model for 18650/18700 Batt. U.S. Seller with Car Adapter Fenix TK11, TK12, TK15 USB discharging qualifications and structures Operation temperature: 0~40 USB interface output floating voltage: 5.0V Output floating voltage ripple: &lt;120 MV Reactive current: &lt;10M A