Power Bank 10000mah PD 20W Charger Portable Power bank 10000 mah External Battery Fast Charge for iPhone Xiaomi Mi 9 Best Power Bank 10000mah.
For Netherlands customers,
If you need to buy a power bank, please buy from the Poland warehouse for faster shipping.
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Q: Power bank has two regular standards of capacity, one is the battery capacity, and one is the rated capacity. The 10000mah power bank, being labeled 10000mah/3.7v core capacity be converted to rated capacity 6500mah/5v.
Why exist this happening?
A: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 10,000mAh power bank can really be used by us only about 6500mAh.