VGS MARKETINGS XL4015 5A DC-DC Adjustable Step Down Board LED Voltmeter Power Supply Module 4.0-38V to 1.25V-36V DIY High Power 75W Power Supply Electronic Hobby Kit

Micro USB input: 5V 1A,,PLEASE INSERT CHARGER AFTER CONNECTING BATTERIES FOR FIRST TIME TO START THE MODULE USB Output: 5V 2.1A / 5V 1A(Dual USB interface) Charging display: intelligent digital display Batteries Type: liquid lithium-ion batteries (18650) Best for arduino,DIY Kits,Power bank , etc Note: Please allow at least 2 charge / discharge cycle to measure the correct capacity of battery by micro chip for accurate display This is the mobile power module Accessories, 18650 Circuit board shell. Meet the individual needs of your DIY, but you must understand basic electronic assembly. Features: Motherboard comes with protection function: Charging overcharge protection, over-discharge protection, overcurrent protection. Intelligent output device after charging full, automatically stop charging, to prevent mobile phones overcharge. Output voltage and current stable, will not harm user devices. Installation instructions: The circuit board is connected to the battery negative B-, B + is the positive, do not connecting reversed, connecting reversed will burn the board, the battery is connected in parallel welding, assembling battery. Note that the insulation between the battery and the circuit board, battery lead not to touch the circuit board, so as not to cause a short circuit. Specifications: Micro USB input: 5V 1A USB Output: 5V 2.1A / 5V 1A(Dual USB interface) Charging display: intelligent digital display Batteries Type: liquid lithium-ion batteries (18650) Product Size: 57mm x 28mm Screen size:27mm x 17mm Package included: 1x Mobile Power Bank 18650 Battery Charger PCB Dual USB 18650 Battery Charger PCB Power Module 5V 1A 2.1A Mobile Power Bank Accessories For Phone DIY LED LCD Module Board Product Description The circuit board is connected to the battery negative B-, B + is the positive, do not connect reversed, connecting reversed will burn the board, the battery is connected in parallel welding, assembling battery. Note that the insulation between the battery and the circuit board, battery lead not to touch the circuit board, so as not to cause a short circuit. Feature: Motherboard comes with protection function: Charging overcharge protection, over-discharge protection, overcurrent protection. Intelligent output device after charging full, automatically stop charging, to prevent mobile phones overcharge. Output voltage and current stable, will not harm user devices. Micro USB input: 5V 1A USB Output: 5V 2.1A / 5V 1A(Dual USB interface) Charging display: intelligent digital display Batteries Type: liquid lithium-ion batteries (18650) Product Size: 57mm x 28mm Screen size:27mm x 17mm Package Include: 1PCS Dual USB 5V 1A 2.1A Mobile Power Bank 18650 Battery Charger PCB Power Module