4-in-1 charge/discharge/lithium battery protection/battery power indicator module. The module comes with a lithium battery protection function (the lithium battery does not need to be equipped with a protection board, it does not matter if it is equipped with a protection board)Overcurrent protection (OCP). Over Voltage Protection (OVP) Over Temperature Protection (OTP). Short circuit protection (SCP)In the discharging mode (the KEY function of the charging mode is invalid), trigger the KEY port once to turn on the output; trigger the KEY port 2 times to turn off the output.When the load is connected twice, the output will be turned on automatically. If the load is less than 50MA, the output will be turned off after 30 seconds; if the load is greater than 50MA, the output will be continuously turned on.Allow charging and discharging at the same time (Note: At this time, the output voltage is less than 5V. Stop charging and discharging will also stop. It will be output only after reactivation.)Charging voltage: DC 4.5V-5.5V (DC 5V recommended)Charging current: 0-2.1ACharging quiescent current: 100uAFull voltage: 4.2V+-1%.Discharge current: 0-3.;Discharge quiescent current: 50uADischarge efficiency: 96%Output voltage: 5VOutput current: 0-2.1A;Ambient temperature: -20°C to +85°CPin description:1 VIN: Charge port positive input +2 GND: Negative input of charging port-3 BAT: Lithium battery +4 GND: Lithium battery-5 GND: output port negative output-6 VOUT: Output port positive output+7 KEY: Output enable trigger port (low pulse trigger)Material:PCBcolour:greenPackage Contents:5 x Charging Board ModuleOnly the above package content, other products are not included.Note: Light shooting 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.About UsWe provide the good product with the best price,we support Wholesale/Drop Shipping Order1. For Drop Shipping order, please remark"dropshipping order", we will prioritize it.2. For Wholesale/Drop Shipping orders, if you have any ideas about the price or package,please contact us in advance,we will give you the best service to satisfy your demands.About Shipments1.We will send out the orders ASAP once your payment is completed normally.2.Please write your complete delivery address with correct phone number and zip code, especially please confirm your full name.About After-sale ServiceWe are reliable seller and we have our professional after-sale service for all of our customs. If there is any question about the order,please contact us in advance ,we will always here until you get a happy answer.About Feedback1. Please check the package and item when you get carefully to make sure there is no problem.2. If you have any problem or are not entirely satisfied with your package,please don’t be hesitate to contact us first before leaving negative feedback. We will resolve the problem to satisfy you.24021. If there is no problem, please leave us five star positive feedback.Your affirmation is our greatest motivation ! ! !