XTAR SC2 USB Portable 3A Speedy Battery Charger 18650 20700 21700 PRODUCT HIGHLIGHTS: Speed Charge at 3A x 1 or 2A x 2 Easy-to-read LED indicator Charge anywhere anytime with Micro USB charging port Compatible with 18650, 20700, 21700, 26650 and more including 21700 Protected Batteries Reverse polarity protection protects if cell is entered in the wrong way 0V activation can bring dead batteries back to life Soft Start & TC-CC-CV Three Stage Charging CONTENTS: Xtar SC2 battery charger Xtar QC 3.0 USB Cable User Manual Scratch and Check validation serial number SPECIFICATIONS: Connector type: Micro USB Input – DC 5V / 2.1A Output Current – 3A x 1, 2A x 2 channels Cutoff Voltage for Li-ion Battery – 4.2V ±.05V COMPATIBLE WITH: 3.6V/3.7V Lithium ion Batteries Most Cylindrical Lithium-ion Batteries Ranging In Size From 10440 To 26650 including 18650, 18700, 20700, 21700, 22650, 25550 and 26650