This charger is capable of charging two cells at 1A or four cells at 0.5A. Compatible with the new 20700 & 21700 formats (see below for more compatible formats). PROTECTION Over-Charge Reverse Polarity Temperature Short Circuit COMPATIBLE SIZES AND ADDITIONAL FEATURES Real time OLED with analogue style gauges (Voltage, Charging Amps & mAh readout) 10440/14500/14650/16340/17500/17670/18350/18500/18650/18700/20700/21700/20650/26650 Li-Ion, IMR/INR/ICR/NCR Independant Charging Bays Suitable for IMR/INR/ICR/NCR batteries and Button/Flat Batteries Overcharge Protection Fireproof ABS casing PACKAGE CONTENTS 1 x VC4 Charger 1 x Micro-USB cable 1 x Xtar Warranty Card 1 x Wall plug adapter SAFETY TIPS Never leave a charger unattended overnight, and never in direct sunlight. Never use your charger to store cells. When cells are finished charging, please remove them from the device.