3 USB Power Bank Battery Charger Module Circuit Board Step Up Boost DIY 5V 2.1A

All 3.7V-4.2V rechargeable lithium batteries, such as cell phone batteries, flat batteries, 18650 batteries, and so on. It could be connected to a lithium battery can also be connected in multiple sections of lithium batteries Lithium positive pole connected B + Lithium negative then B- 3 USB output, according to the device automatically recognizes the output 5V1A or 2A current on the phone. Flat charge, you can also charge three mobile phones at the same time.

Features:

• A Software Version: only one circuit board
• 3 USB charging interface for charging up to three mobile phones simultaneously
• Dual IC control, synchronous rectification, high conversion rate of 90%
• Advanced mass inductance, double tube rectifier performance
• Over discharge, Over charge, overload protection circuit

Package Includes:

• 1 x 3 USB Power Bank Battery Charger Module Circuit Board Step Up Boost DIY 5V 2.1A