"Cheston One 2A Battery Charger | Suitable with 2.0/4.0mAH Batteries for Cheston One PowerEcosystem (Battery Not Included) - Supported by a 6 Months Warranty" Dedicated to Cheston One Power Ecosystem: Cheston 21V fast smart charger is designed for Cheston One power ecoystem series 2.0Ah and 4.0Ah batteries, ensuring compatibility and efficient charging for these specific battery types. Enhanced Performance: Designed with battery protection features, this charger safeguards your battery from potential damage caused by over discharge, high temperatures, or overload situations. Fast Charging: This charger guarantees quick charging, with a 2.0Ah battery reaching full charge in only 1.5 hours and a 4.0Ah battery in 2.5 hours. The Cheston Battery Charger can charge 2.0/4.0 mAh batteries at any time, regardless of whether they are fully discharged or not, eliminating the need to wait for complete discharge. In the Box : 1 Units of 21V (2A) Battery Charger