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USB 5V 2.1A Micro/Type-C USB Mobile Power Bank 18650 Charging Module Lithium Battery Charger Board Circuit Protection

USD 1.89USD 2.52

USB 5V 2.1A Micro/Type-C USB Mobile Power Bank 18650 Charging Module Lithium Battery Charger Board Circuit Protection

Description
Features:
1. Switch charging, internally set 2A charging current <charging efficiency up to 90%@2A
2. Charging switching frequency 1MHz
3. Trickle/constant current/constant voltage three-stage charging
4. With charging current adaptive adapter function, charging current temperature adjustment function, charging current automatically decreases with temperature rise <C/10 charge termination.
5. Integrated charging over-voltage protection and battery over-temperature protection
6. Synchronous boost output 5.1V
7. Discharge switching frequency 500KHZ
8. Discharge efficiency up to 94%
9. Automatically identify the load, and automatically shut down under light load
10. Original boost output thermal regulation function
11. Discharge module over current, short circuit, over voltage, over temperature protection
 
Precautions:
 
What kind of battery should I use for the battery?
The battery should be a flat-head 18650 battery, 65MM long, and a pointed battery cannot be used. If you use old batteries, different capacities, and different brands are not available, the disassembled batteries should ensure that each battery has a voltage of at least 3.5V. If the voltage is too low, put it in and not charge. (Note: You can also use lithium batteries, mobile phones and tablets. battery)
 
How to distinguish battery +- pole and power box +- pole?
Generally, the negative side of the plane of the 18650 battery is the negative electrode, and the positive electrode is the side with the hole. It must not be installed backwards, it will burn all at once, and it will be useless to install it right.
 
Why is there no power output after installing the battery?
After installing the battery, you must plug in the 5V charger to activate it before it can be used.
 
What is the actual conversion rate of this power box?
The new full-capacity real-standard battery, the conversion rate is about 80, because the added cable has line loss, the old battery or mixed virtual standard is not easy to say, so I can't give you an accurate answer to ask about the conversion rate. People will disassemble the battery and install them together. Can you tell the exact number? Maybe no one can tell. Even if it is said, it is deceiving. The old battery has been used for so long. I don’t know how much capacity has been lost. I don’t know if the life span is about to end. I don’t know the actual capacity and internal resistance at all. Power down is fast. What about the actual capacity?
 
Why does the charging power off or shut down automatically?
This is caused by the large internal resistance of the disassembled battery. Check the pairing (of course, no instrument can not detect) or replace with a new battery. In addition, try to use a better line. If the output current is too large, it will cause power failure protection. If the load current is greater than 1A, use 5V2.1A. Charging will not cut off the protection.
 
Why can't I charge it to 99%?
If it is a new battery, the first time the battery is installed, discharge it first (that is, charge the phone), turn off the power inside, and then charge it again to balance it to 100%. If it is an old battery, discharge it first and then charge it again. If it still does not work, it is caused by large internal resistance and inconsistent capacity.
 
Why is the display percentage inaccurate when the battery is just installed, and obviously only 50% of the battery is installed to display 80%?
When the battery is installed for the first time, discharge it (that is, charge the phone), turn off the power inside, and then charge the power supply once to balance it, and the percentage will be displayed. All digital display power supplies are like this.
 
Specification

Dissipation Power : -

Model Number : Power Bank

is_customized : Yes

Supply Voltage : DC 5V

Origin : Mainland China

Brand Name : EC Buying

Application : -

Operating Temperature : -

Type : Voltage Regulator

Package : TQFP

Condition : New

Other Type 2 : LED DIY Board

Other Type : Step Up Boost Module

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