Lithium battery 3V 3.7V liter 5V 1A boost board mobile power bank main board boost charger module

Product features:
1. Compact. Supports both charging and discharging at the same time
2. It has overcharge and discharge protection;
3. The board size is approximately: 1mm thick * 18mm wide * 20mm long.
Basic product parameters:
Input port: Micro USB (Android port)
Input requirement: 5V constant voltage power supply can be used as a charging input power supply
Output port: USB
Output parameters: 5V 1A
Available batteries: 3.1V-4.2V polymer lithium batteries such as 18650 batteries, mobile phone batteries, tablet batteries, MP3 batteries, etc,
(Note: Parallel connection increases capacity. Series connection increases voltage and can only be used in parallel!)
Unavailable batteries: dry battery, battery, 1.2V rechargeable battery, nickel battery, 3.2V iron lithium polymer lithium battery
Wait.
When installing the product, pay attention to the following points:
1. The battery needs to be connected in parallel, and the voltage needs to be between 3.2-4.2V to work. 18650 flat head and polymer batteries can work together;
2. The battery is positively connected to the motherboard B+negatively connected to B -, but installation will burn out the resistor;
3. It is not recommended to mix new and old batteries, high internal resistance batteries, and batteries with large capacity differences.