HW-357 3.7V 9V 5V Adjustable PCB Step Up 18650 Li-ion Battery Charge Discharge Power Bank Charger Module

Product sellpoints:Easy Operation: Simple to use with a default output of 9V and adjustable voltage via a rotating boost.Portable Design: Compact 33*23*5mm size and lightweight 5g make it a convenient power bank accessory.Versatile Application: Ideal for DIY 18650 battery projects, multimeters, and recharging lithium batteries.Do Power Bank Come Charged|Hohm Life 18650|Adjustable Output Voltage: Features a 4.3-27V adjustable output, perfect for powering various devices precisely.High Efficiency: Boasts a 2A MAX output current, ensuring efficient power delivery to your devices.