What is mAh? mAh means milli Ampere Hour, the capacity of the power bank is measure with mAh.
Where is power bank made from? Majority of the power banks in the market are actually made in China.
How do I charge the power bank? You can charge your power bank via the charger that came with your phone, computer USB port or using other power bank.
How long do I need to charge the power bank? It's depending on the REAL CAPACITY of the power bank. The larger REAL CAPACITY, the longer charging time may required. Different charging methods may result different charging time as well. Charging with the original charger will be faster than charging with computer USB port.
Why sometime I need longer time to charge the same power bank? Even though using the same charging method, the charging time may be differ due to environment,temperature, power flow and etc.
A 12000 mAh REAL CAPACITY power bank, able to charge a 1500mAh capacity phone for 8 times full? This is a common mistake make by most of the people. For rough calculation of the total charge time, kindly use this formula REAL CAPACITY * conversion rate * phone battery health / phone capacity = total charge times EXAMPLE: 12000 x 0.8 x 0.8 / 1500 = 5.12 charge times (0.5-1 times plus minus)
What's phone battery health? In simple, it's mean how a healthy' your phone battery is. Phone battery storage capacity will be lower and lower. That's also the reason why our phone can last longer when it's newly bought than after 3-6 months we used it. Different mobile phone models also will affect the calculation as some phone drain battery faster than the other.
What's the different between branded power bank and generic power bank? Branded power bank mostly sell in REAL CAPACITY. Generic power bank mostly sell in MARKING CAPACITY. That's the reason why you will never see any branded power bank (standard size) have anything as high as 30000mAh a 50000mAh. That's also the reason why a good 12000-13000mAh power bank are able to charge more or about the same like the market 30000-50000mAh power bank.