FAQ About Basic Knowledge of Power Bank

What is power bank?

Power bank serve as an extra battery' or external charger for your phone or other electronic devices. It is a portable power source built of rechargeable battery, packed in a small case that can be carried in a handbag or purse. It has at least one input for charging and another recharging port that can be connected to a standard USB cable that can recharge portable electronic devices like smart-phones, media players and tablet PCs. Most of the newest power-bank models, arrive with built-in Lithium polymer battery, which known by high efficiency and long lifetime.

How do I know which power bank suits my device?

Depending on individual needs and requirements, there are several general criteria to consider when selecting a power bank:

a) Capacity

For example if your phone battery is 1500mAh and is 0% now, a power bank with 2200mAh can charge your phone 1 time. If your phone battery is 3000mAh and is 0% now, a power bank with 2200mAh will not be able to charge your phone to full because the phone battery capacity is higher than the power bank. If you require a power bank that is able to charge your phone several times, you need a power bank with higher capacity.

b) Number of output

1 output to charge 1 device, 2 outputs to charge 2 devices.

c) Output specification

1A-1.5A output is generally for smart-phones, 1.5A-2.0A output is generally for tablets.

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.

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.

What is the lifespan of the power bank?

Generally, a properly maintained power bank can retain up to 80-90% of its original capacity at 400-500 charge and discharge cycle (charge then discharge = 1 cycle, regardless of whether you charge/ discharge it partially or fully). Until your power bank no longer holds sufficient charge to meet your needs, you may choose to purchase a new one.

Where to buy power bank?

Buy power bank online you can choose Tattu 10400mah power bank, the capacity in fact is 10800mah, and use Lithium Polymer battery cell, high weight and high quality. It charges the iPhone 6S almost 5-6 times, iPad air2 almost 1-1.5times or iPad mini4 1.5-2 times, and also charge Android smart-phones and others.

General Information

– A = Ampere – mA = mili Ampere – mAh = mili Ampere hour – Output from computer’s USB port = about 500mA – Output from wall plug (3-pin plug) = varies (please refer to specific wall plug specification) – Output from power bank USB port = varies (please refer to specific power bank model)