3.7V 18650 Dual Battery Charger 3.7V 18650 dual battery charger designed for fast and safe charging. Features overcharge and short circuit protection, dual LED indicators, and USB input. Compact and portable, perfect for charging two 18650 Li-ion batteries simultaneously, ideal for flashlights, electronics, and DIY projects. Specifications Input Voltage: AC 230V Output Voltage: 4.2V ± 1% Charging Current: 2 x 1A (fast charging) Battery Type: 18650 Li-ion rechargeable batteries Safety Features: Overcharge, short circuit, over-discharge, and reverse polarity protection LED Indicators: Red for charging, green for fully charged Material: High-quality ABS plastic