2A USB 18650 Battery Charger Module Boost 3.7V to 5V 9V 12V

2A USB 18650 Lithium Li-ion Battery Charger Module Boost 3.7V to 5V 9V 12V charging boost converter step-up all in one The OUT Port can output an adjustable voltage For example: VIN Port input 5V solar panels, BAT port can output 4.2V to charger 3.7V 18650 battery Specifications: Discharging current: Max. 2A Charging current: Max. 1A Input voltage: 4.5-8V DC Output voltage: 4.3-27V DC (adjustable) Charging voltage: 4.2V DC Size: 3.3×2.3cm/1.3×0.91″