<p>PW4000 Is A 1~4 Cell Lithium Battery Charging Management Chip.</p> <p>Can Operate Within The Input Range Of 4.2V To 20V, With A Maximum Charging Current Of 3A.</p> <p>The Charging Voltage Can Be Configured Through An External Resistor.</p> <p>In Charging Mode, If The Input Is Lower Than The Battery'S Full Voltage, It Boost Charging;</p> <p>If The Input Is Higher Than The Battery'S Full Charge Voltage, The Battery Be At A Reduced Voltage.</p> <p>Product Name: 1S2S3S4S Buck-Boost Fast Charging Battery</p> <p>Charging Current: 2A</p> <p>Power Supply Interface: Type-C Interface</p> <p>Instructions For Use</p> <p>The Voltage Is Connected Through Type-C Or Welding, And The Input Voltage Range Is 4.2~20v.</p> <p>If You Purchase A 1S Charging Module, The Output Voltage Is 4.2V</p> <p>If You Purchase A 2S Charging Module, The Output Voltage Is 8.4V</p> <p>If You Purchase A 3S Charging Module, The Output Voltage Is 12.5V</p> <p>If You Purchase A 4S Charging Module, The Output Voltage Is 16.8V</p> <p>The Number Of Your Own Batteries Must Match The Charging Module, 8.4V 2S</p> <p>The Battery Can Only Use The 2s Charging Module. The Same Applies To 1S, 3S, And 4S.</p> <p>If There Is No Battery At The Output Of The Charging Module, The Red And Green Lights Flash Respectively After The Charging Module Is Powered On, Indicating An Abnormality.</p> <p>If The Red Light Of The Charging Module Is Always On, It Means It Is Charging.</p> <p>If The Green Light Of The Charging Module Is Always On, It Means Charging Is Complete.</p> <p>Note:</p> <p>Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use</p> <p>Colour:As Shown</p> <p>Material:PCB</p> <p>Package Contents:</p> <p>1 x Fast Charging Module</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>