Extreme compact size, max 3A fast charging• Great compatibility, can charge protected 20700/21700 batteries.• Micro-USB powered, charge anywhere• Intelligent Adapting Identification• Available with QC3.0 protocol, fast 2A×2 / 3A×1 charging• Easy-to-read LED Indicator• 0V Activation Function revives over-discharged battery• Soft Start& TC-CC-CV Three-Stage Charging