External smart battery Case For iPhone 13 mini Portable Battery Charger Cases For iPhone 11 12 14 13 Pro Max Power Bank charging Cover

How to use:
1.Turn on:Click the switch for 3 seconds to start charging.
2.Shut down:Click the switch for 3 seconds off charging

CHARACTERISTICS:
1. Attractive and exquisite, easy to carry.
2. This product is designed as protective backup battery case, which can protect your cell phone well.
3. It is suitable for stand by power supplies to travel, tourism, long distance car business and ships, field work or power outages environments.

NOTE:
1. Do not throw the product into the fire or placed in any overheating environment.
2. Do not disassemble the pruduct or any form of maintenance and modifications.
3. Please follow the instructions, in accordance with the normal method of operation to use this product. If you have any questions, please feel free to contact us.

Specification:

Product type: Class A lithium ion polymer battery
Input current: 5V 1500mA
Output current: 5V 1500mA
Working temperature: 0-45 temperature degree
Battery capacity: 6800mAh, the Rated capacity is 3900-4200mAh

 

Why exist this difference?

The most important reason is the conversion rate. Because most of power bank's battery voltage is 3.7V, and power bank needs to increase the voltage to 5V when charging the mobile phone, which making the power bank's conversion efficiency only 3.75/5=74%, Also include generated heat when battery voltage boosting, and various of wire consumption, Electricity and self-consumption. these points add up to account for 30%-40% of the power of the mobile power source.
So the 5,000mAh power bank can really be used by us only about 3000-4000mAh.

Also, The conversion rate of the entire mobile power industry is basically in the range of 60%-70%. Please kindly noted.

Please search on Google if want to know the details!