4Pcs 2A USB 18650 Lithium Li-ion Battery Charger Module Boost 3.7V to 5V 9V 12V Adjustable DC-DC Step Up Boost Module

5V 3A 9V 12V 2A Charge Discharge Integrated Module for 3.7V 4.2V 18650 Lithium Battery Fast Charging Boost Mobile Power Protection PCB Board Specifications: ? Input voltage: 4.5-8V DC ? Output voltage: 4.3-27V DC (Continuously adjustable) ? Charging voltage: 4.2V DC ? Discharging current: Max. 2A ? Charging current: Max. 1A Features: ? Can be used for multimeter, converted to lithium battery charging ? For example: VIN+Port input 5V solar panels, BAT+port can output 4.2V to charger 3.7V 18650 battery NOTE: ? The OUT+Port can output an adjustable voltage Package Includes: Step Up Boost Module---------------4Pcs