Dual USB 3.7v to 5V 2A Mobile Power Bank Module

Overview:

The Dual Micro USB 3.7v to 5V 2A Mobile Power Bank Module can be used to build your own power bank.

Features:

• 4 states of LED lights to show electricity, non-working state smart automatic shutdown
• Built-in lithium battery protection IC, over-current, over-voltage, under-voltage protection
• Dual USB output
• Size: 69 x 32 x 8mm

DIY 3.7v to 5V 2A power bank parameters:

• Input port: Micro USB (Android port)
• Input requirements: 5V constant voltage power supply can be used for charging input power, a normal charger of 5V 1A or higher will work
• Output port: USB
• Output parameters: 5V 1A / 5V 2A

Requirements for rechargeable batteries:

• Battery - 3.7V-4.2V polymer lithium battery - 18650 battery, mobile phone battery, flat battery, can choose single cell power supply, or multiple cell parallel power supply(does not support the series).
• Can be connected in parallel with 2-6 pcs 18650 batteries.
• Suitable for Lithium-ion batteries only

Note for installation:

• The battery should be connected in parallel, only the voltage between 3.2-4.2V can work
• The battery must be connected to the board, B+ stands for the positive pole, B- stands for the negative pole, if it's connected in reverse, the board will burn
• Don't mix old batteries and new batteries and batteries with different models and brands

Package includes:

• 1 x Dual Micro USB 3.7v to 5V 2A Mobile Power Bank Module