DIY Supplies : MetalworkingUSB Color Screen Charging Tester Numerical Control Voltage Buck And Boost Power Supply Applicable Model:XY-UMPDThe product has constant current function, which can charge all kinds of small rechargeable batteries within 0.6V - 30V within 10 - 20WCharging steps: (1) Determine the floating charge voltage and charging current of your rechargeable battery; (if the parameter of lithium battery is 3.7V/2200mAh, the floating charge voltage is 4.2V; if it is 12V rechargeable battery, generally set the floating charge voltage to about 14V)Charging steps: (2) Under no-load condition, set the output voltage to floating charge voltage; (if 3.7V lithium battery is charged, adjust the output voltage to 4.2V)Charging steps: (3) Set the charging current (constant current value) and set the current directly. Note: when setting the current, calculate the lower power, charge within the power range, and use the super power, the product will enter the protection state.Charging steps: (4) Connect the battery for charging.The product has constant current function, which can directly drive 0.6-30V,0-15W LED lampTo drive the LED lamp:(1) Determine the working current and maximum working voltage you need to drive the LED(2) Under no-load condition, set the voltage value and current value to make the output voltage reach the maximum working voltage and current of LED (Note: calculate the power when setting the current, charge within the power range, use over power, the product will enter the protection state.)(3) Connect the LED and test the machine. This product can adjust the constant current value (between 0 - working current) to realize the LED's stepless dimming and no stroboscopic!!USB tester system: Short press the " ON/OFF " button to turn on and off the USB output, long press the " ON/OFF " button for 2 seconds, the screen can rotate, 360 four-way rotation. Short press the " UP/DOWN " key to turn pages with one key.color:As shownMaterial:Plastic + MetalPackage Contents:1 x XY-UMPD USB Color screen charging tester1 x CableOnly 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.