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1. What is a power bank?
A power bank is a portable electronic device that is a combination of a power supply and a charger. It can charge or power your mobile phone or other digital device anytime, anywhere. The storage unit is a battery, also called an external battery or backup battery, different from the built-in battery of the product.


2. Can the power bank submerged in water?
No! The power bank cannot survive immersion in water.


3. Can the power bank placed in the sun?
It is not advised to expose the power bank to direct sunlight. Prolonged exposure to heat can reduce its performance.


4. How do I know whether the power bank is fully charged?
Most GCELL power banks use the built-in 4 indicator lights to indicate battery level, each representing 25% of the capacity. When the mobile power is being charged, the indicator lights will blink alternately, and then go to all solid ON when done, indicating that it is fully charged.

5. If the power bank has not been charged or discharged for a long time, will it suffer from memory effect?
No, most GCELL power banks adopt lithium battery, which has no memory effect.


6. What is the lifespan of my power bank?
It can take up to 500 deep charge/discharge cycles, after which its battery capacity will drop gradually.


7. Can I use my device when it is being charged by the power bank?
Yes, you can use your device while charging, but the run time of the power bank will be altered because you are consuming the battery power while using the device.


8. What does it mean by simultaneous charging and discharging?
Simultaneous charging and discharging means that while the mobile power is being charged via laptop USB or USB adapter, you use it to charge your digital device.


9. If my device is still charging after being fully charged by the power bank, will it have serious effects?
No, GCELL power packs have a built-in overcharge protection circuit and automatic cut-off feature. Once the device is fully charged, the mobile power will automatically cut off and activate the power saving mode.


10. Are lithium polymer batteries safe?
Yes, this is one of the safest and most efficient battery technology at present.


11. Why is the charging time of the power bank sometimes different from the actual one? What are the factors causing this?
The charging time was measured under the condition of non-stop charging during the process. When the screensaver comes on on a laptop, there is no power output from the USB, that is, all charging stops.


12. Do GCELL power packs have intelligent protection in the circuit design? What effects do overcharging and deep charging have on MiLi mobile power?
All GCELL  power packs have intelligent projection, so they have no overcharging or deep charging problems.


13. How can I give proper care and maintenance to the battery? Do I have to charge it for 12 hours for the first three times?
You don’t need to do so. The batteries are factory activated and have undergone aging treatment, so you can just use it as normal. The best maintenance is to charge and discharge the product fully to maximize battery cycle life.


14. Why do I get the message “iPhone does not support this accessory” when I connect it to the projector?
There are several major reasons: First, poor connection with the connector, or failure in coming into contact within a short time; second, abnormal connection detection signal; third, there are gaps or long-term short circuits between the pins of the connector; fourth, abnormal output parameters.