Adjustable Step Up 18650 Li-ion Battery Charger & Discharge HW-357 3.7V 9V 5V

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HW-357 Adjustable Step-Up Module – 18650 Li-ion Battery Charger & Discharge Features: Micro USB Input Terminal With A Female, Can Be Directly Input To Do With The Phone Charger Rechargeable Lithium Battery, And Still Retains The Input Voltage Wiring Pads, Can Be Very Convenient DIY It Can Be Used For Voltage 3.6 3.7V, Etc. 18650, Polymer And Other Lithium Battery Charge And Discharge Protection It Support Charge Discharge Over Current Protection It Supports Simultaneous Charging And Discharging Charge Cutoff Voltage: DC 4.2V±1% Charging Mode: Linear Charge Working Environment Temperature: -20-85 Degrees Celsius For Example: VIN+ Port Input 5V Solar Panels, BAT+ Port Can Output 4.2V To Charge 3.7V 18650 Battery Note: The OUT+ Port Can Output An Adjustable Voltage Specifications: Input Voltage: 4.5-8V Output Voltage: Continuous Adjustable 4.3-27V (Counter Clockwise To Boost Voltage) Charging Voltage: 4.2V Charging Current: Up To 1A Discharge Current: The Maximum 2A Output Reference Maximum Current: 5V 1.4A, 9V 0.8A, 12V 0.6A Quiescent Current: About 0.5 MA Overshoot Protection: Yes Over Discharge Protection: None (Also Can Be Said Yes, Because 2V Cut-Off Boost But Does Not Block The Output, Output Has 2V) Deadline Boost:: 2V, Depending On Whether Added The Additional Protection Board Size: 3.3 X 2.3 X 0.5cm Connecting Example, VIN + Connect 5V Solar Panel, BAT + Terminal Can Output 4.2V To Charging 3.7V 18650 Battery, OUT + Side Can Output An Adjustable Voltage Can Be Used For Multimeter, Modified Lithium Battery Charging Connections: VIN+ Connect 5V Solar Panel BAT+ Terminal Can Output 4.2V To Charging 3.7V 18650 Battery OUT+ Side Can Output An Adjustable Voltage Applications: Portable Power Banks: Provides a compact solution for creating custom power banks using 18650 Li-ion batteries. ​ Battery-Powered Projects: Supplies adjustable voltage to various electronics projects requiring portable power. ​ DIY Electronics: Ideal for hobbyists and makers building battery-operated devices with specific voltage needs.