80000mah Portable Solar Power Bank Charging Powerbank Three defenses External Battery Charger Strong LED Light Double USB
usage method: Stand alone switch, start charging
How to use LED mobile phone:
1. Double click the switch quickly to turn on the LED light
2. Click Fast Close again to change the brightness frequency
3. Double click the switch quickly to turn off the LED light
Product name: Power Bank
battery capacity: 80000mah
Usable capacity: 8000-10000mah
Material: plastic ABS + TPU
NOTE: Portable Battery charger case has two regular standard of capacity, one is the battery capacity, one is the rated capacity.
Why does this difference exist?
The most important reason is the conversion rate. Because most of the power bank’s battery voltage is 3.7V, and the 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 note.