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  • Designed for 18650 battery DIY power bank: The battery of the 18650 battery must be flat, and the length is 65MM. The pointed battery cannot be used. If you are using old batteries, different capacities, different brands are not available, the assembled battery is guaranteed to be at least 3.5V per voltage. If the voltage is too low, it will not be charged. (It also support lithium battery, mobile phone battery and battery)..
  • Supported connection methods: It is possible to connect only one lithium battery or multiple lithium batteries in parallel. The capacity of connected battery is no more than 200,000 mAh, As long as the battery with a voltage of 3.0-4.2V can be used..
  • Charge indication of this power bank pcb board: The word "IN" will be shown in the display; Output indication: Long press the LED button after turning on the load, Start output, The word "OUT" and the current and voltage of 5V 1.0A or 5V 2.1A will be displayed in the display..
  • This is a mobile powerbank module with Protection Function: The protection circuit of the boosted lithium battery has been integrated, prevent over-discharge, over-charge, overload short circuit protection, over current protection, and over temperature protection. Note: The positive pole of the battery is connected to B+ and the negative pole is connected to B-, do not reverse it. If it is reversed, it will burn out!!!!.
  • Why can't continue charging when charging capacity is 99%? You just assembled the battery, why the display percentage is not accurate, the battery power is only 50%, but it shows 80% after assembly?--Whether you are using a new battery or an old one all need to be discharged before use(charge your mobile phone), then turn it off charge it once gain. If it still cannot be solved, it is caused by large internal resistance and inconsistent capacity..
Note: 1. The B+ and B- connected to the boosted battery must not be reversed. Normally the flat surface of 18650 battery is negative pole while the other one is positive pole. 2. 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. 3. 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 battery) How to distinguish between battery + - pole and power box + - pole: Normally the flat surface of 18650 battery is negative pole while the other one is positive pole. Please install it correctly, or it may destory the battery. Why is there no power output after the battery is installed: After install the battery, you must plug in the 5V charger to activate it. Package Including 2 * Dual USB Charging Module

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2 Pack 18650 Battery Charger Protection Module, MELIFE Power Bank PCB Module Board, Dual USB 5V 1A 2.1A with BMS Protection DIY Mobile Charging Accessories Digital LCD Display Indicator

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