General description The 3X Rechargeable 4 Slots Smart USB Li-ion Battery Charger is designed for charging various lithium-ion batteries, including 10440, 14500, 16340, 16650, 14650, 18350, 18500, and 18650 models. It features a user-friendly design, making it convenient for travel, and allows for charging two batteries simultaneously. Technical specifications Product model: BH-042100-04U Product weight: approximately 106g Input voltage: DC 5V 1-2A Output voltage: DC 4.2V 1000mA Product size: approximately 90 * 30 * 122mm / 2.7 * 0.9 * 3.66 inches Compatibility and accessories Compatible with 10440, 14500, 16340, 16650, 14650, 18350, 18500, and 18650 batteries Package includes: 3 * AC charger Installation Folds out easily for charging and storage Usage Smart charger can charge two batteries at once Features a battery recovery function to maximize battery life Charging time: approximately 3 hours Other information DC 5V input safety voltage Reverse polarity and short circuit protection