Silm Power Case For iPhone 14 Pro Max External battery charger case For iPhone 14 Plus charging Back Cover Portable Power Bank
-Item Type: battery charger case
Material: High Quality Silicone+Plastic
How to use:
1.Start charging: click the switch for 3 seconds
2.Stop charging: click the switch for 3 seconds
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.
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.
Portable Battery charger case has two regular standard of capacity , one is the battery capacity, one is the rated capacity.
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!