Efest Pro C4 Battery Charger delivers a sleek and cost-effective method of charging four batteries at once. Simply plug the AC wall plug in and watch your drained batteries regain their full charge, thanks to the LED indicator light. When the light flashes from red to green, you know you??????re ready to go! Best of all, this charger can charge more than just common vape batteries; now you can charge the common 3.6V/3.7V lithium batteries, used in e-cigs, small electric tools, flashlights, and anything that uses the proper voltage. Compatible batteries include the following Li-ion batteries: 10440/14500/14650/16340/16650/17650/17670/18350/18490/18500/18650 Product Specifications: Compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 22650, 26500, 26650 Battery Life LED Indicator Light Four Bay 1A Charger Non-Slip Mat AC Input Power: AC 100~240V 50/60Hz DC Output Power: DC 12V 1A DC Input Power: DC 12V 1A 1A CC Current: 1000mA (+/-10%) Auto Cut-Off Voltage: 4.20 (+/-0.05V) CV Cut-Off Current: <100mA Standby Current: <20mA Activation Current (Battery Voltage <2.90V): 10mA~50mA Auto Recharge Voltage: 4.10 (+/-0.10V) Operation Temperature: 0C ~ 40C Storage Temperature: -40C ~ 70C Product Includes: 1 Efest PRO C4 Charger 1 AC Wall Plug