18650 Dual Micro USB 3.7V to 5V 2A Boost Mobile Power Bank DIY 18650 Lithium Battery Charger PCB Board Step Up Module with Led

DIY power bank/charger circuit board product characteristics: level 1.4 LED lamp displays electric quantity, and intelligent automatic shutdown in non-working state; 2. Built-in lithium battery protection IC with over-current, over-voltage and under-voltage protection; 3. Dual USB output; 4. Board size: 8mm thick * 32mm wide * 69mm long. Basic parameters: input Port: MicroUSB (Android port) input requirements: 5V constant voltage power supply can be used as charging input power supply, and the most matching charger is above 5V1A the output port: USB output parameters: 5V1A/5V2A requirements for rechargeable batteries: available batteries: 18650 battery, mobile phone battery, tablet battery, MP3 battery, etc. 3.7V-4.2v lithium polymer battery can supply power in single section (sheet) or multiple sections (sheet) in parallel (series is not supported, and series is not allowed). (Notes: increase capacity in parallel, series is to increase voltage, can only be used in parallel!) it can be combined with 2-6 18650 batteries!!! Unavailable batteries: dry battery, storage battery, 1.2V rechargeable battery, Ni-MH battery, 3.2V lithium iron polymer lithium battery, etc. Pay attention to the following points when installing the product: 1. Batteries should be connected in parallel, and the voltage should be between 3.2-18650V to work. Flat head and polymer batteries can be used; 2. The battery is connected to the main board B + the negative connection B- , the main board must be burned when installed; 3. Batteries with different models and brands cannot be mixed.

• 18650 Dual Micro USB 3.7V To 5V 2A Boost Mobile Power Bank DIY 18650 Lithium Battery Charger PCB Board Step Up Module With Led