XTAR X2 2 Bay Quick Battery Charger 18650 20700 21700 Product Highlights: 2 Bay Smart Charger Multiple Charging Speeds - 2A x 1 / 1A x 2 / 0.5A x 2 Innovative LCD screen display shows all information you want Compatible with 18650, 20700, 21700, 26650 and more 0V Activation Function Revives Over-discharged batteries Packaging Contents: Xtar X2 Battery Charger Xtar Power Cord User Manual Additional Features: Two independent battery slots LCD screen with charge rate, voltage, charge capacity Automatically stop charging when complete and restart charging function, so you can keep the batteries inside the charger overnight Reverse polarity and charger short circuit protection ABS durable fireproof shell with perfect heat dissipation and high temperature resistance 0V activation function can rescue your over-discharged batteries. (This feature for advanced users only, charging over-discharged batteries is generally a safety concern) Three stages of charging (TC-CC-CV) to maximize your batteries’ lifespan Automatically detect between Li-ion and Ni-MH batteries Estimated charged capacity readout Specifications: Input – 100-240V ~50/60Hz 0.4A or 5V 2.1A Dimensions: 135mm x 75mm x 38mm Weight: 125g Compatible with: 3.6V/3.7V Lithium ion Batteries Most Cylindrical Lithium-ion Batteries Ranging In Size From 10440 To 26650