DORHEA 5PCS 18650 Battery Charger Digital Protection Board Dual USB 5V 1A 2.1A Mobile Power Bank Battery Charging PCB Module Board with Digital LCD Charging Module for Phone DIY Mobile Power Bank

Features: Input Port:micro USB Input Power Supply: DC 5V Output Power Supply: DC 5V 1A 2.1A Batteries Type: liquid lithium-ion batteries (186 50) Protection: overcharge protection,overdischarge protection, short circuit protection,over current protection,over temperature protection. 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. Package included: 5 x Mobile power bank battery charger protection module Note: Long press the switch, the manboard will turn on the USB output,long press it again to turn off the USB output; Press the switch twice to turn on the lamp, and press twice again to turn off the lamp When use the board at first time, please connect 5V power adapter to the micro USB port to activate the board. It support multi battery in parallel connection. How to choose the right battery: The battery should be flat 18650-battery, 65mm long, pointed battery can not be used. If you use old batteries, different capacities, different brands are not available, disassemble the battery to ensure that each voltage is at least 3.5V or more. If the voltage is too low, then you can put it into the battery. (Note: You can also use lithium battery, mobile phone tablet battery)