Please Note :
Q: Power bank has two regular standard of capacity , one is the battery capacity, 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.
TOPK All-Metal Shell Power Bank With LED Power Display.
Clear Digital Display of Battery Level.You don't Need To Guess theCurrent Battery Level Any More.
Dual USB Ports Output and Three Types of Cable Input.
You Can Charge Two Phones At the Same Time
Chip Upgrade Brings You Superior Multi Protection.
Advanced Technology Makes Your Charging Experience Safer.
Metal Shell Showes The Sense of Light Luxury.
Compliance With Aviation Management Standards.