新聞稿 敬請發佈 99年1月5日

1.
What are the difference between the power bank’s actual and rated capacities?
A. Differences:
The actual capacity of the power bank is the same as its battery. However, there is a
difference between the power bank’s battery voltage (3.7V) and the operating voltage of
charged products (5V) (such as mobile phones). Energy will be lost in the transformation
between the two voltages. Therefore, the actual (rated) capacities for charging a smartphone,
tablet computer, or other electronic device are not that of the battery, but the capacities
calculated after the conversion and subsequent energy loss.
B.
Calculation formula:
Rated Capacity = Power Bank Battery Capacity x Battery Voltage 3.7V / voltage boost 5V x
Conversion Efficiency
Example: The actual capacity is 5000mAh, and conversion efficiency is 85%.
capacity = 5000 x 3.7 / 5 x 85% = 3145mAh
C.
Then the rated
How many times can the PC500 charge a device?
Rated capacity / capacity of the charged device’s battery = number of charges
Example: Battery capacity is 5000mAh, and rated capacity is 3145mAh, an iPhone4 (1420mAh) can
be charged approximately twice.
D.
The following table shows the number of charges for common devices from the ADATA PV100
& PC500.
Device
Smartphone
Tablet
Times for charging
Model
Battery
Capacity
PV100
PC500
iphone 5
1440 mAh
2.16
2.33
iPhone 4S
1420 mAh
2.17
2.34
Nokia Lumia 928
2000 mAh
1.56
1.68
HTC ONE
2300 mAh
1.35
1.46
HTC Butterfly
2020 mAh
1.54
1.66
HTC Butterfly S
3200 mAh
1.85
1.05
Samsung Galaxy Note2
3100 mAh
1.00
1.08
Samsung Galaxy S3
2100 mAh
1.48
1.60
Samsung Galaxy S4
2600 mAh
1.20
1.29
iPad mini
4400 mAh
0.71
0.76
2.
IPad 4
11560 mAh
0.27
0.29
IPad 3
11560 mAh
0.27
0.29
Samsung Galaxy Tab 3 10.1 P5220
6800 mAh
0.46
0.49
Samsung Galaxy Note 10.1 N8000
7000 mAh
0.44
0.48
What are the differences between lithium-ion (18650) and lithium-polymer batteries?
The difference is the different kind of internal electrolytes used internally. Lithium-ion batteries use
liquid electrolyte, and lithium polymer batteries use solid or gel polymers.
These two battery processes are mature and quite safe. However, lithium-ion batteries use liquid
electrolyte, which will have high pressure in an overcharge situation. This can cause rupture of the
sealed metal shell or outflow of liquid electrolyte.
Comparably, lithium-polymer batteries have a higher price but are more stable, with greatly reduced
risk of danger.
Additionally, there are many recycled batteries and so-called Japanese or Korean cells on the market,
but are not really used in the power banks so marked. Thus, selecting a brand with a good reputation is
important for consumer safety.
Lithium-Polymer
Around 25% higher than 18650
Aluminum composite film
Item
Lithium-ion (18650)
Cost
Around 25% cheaper than Li-Polymer
Battery Case
Stainless steel
Fixed size, cylindrical
Any size,
Shape & Dimensions
Depending on housing
(ø18mm / H:65 mm)
Lighter than 18650- 40%
More stability and safety
Cell will expand in abnormal
situation.
Less recycled cells
Weight
Heavier than Li-Polymer 40%
Safety
Explosion risk higher than Li-Polymer
if vendor's manufacturing procedure
is deficient
Recycle Risk
Recycled or reused cells very often
3.
How many times can the battery be charged and recharged?
Charging the battery to 100% and then discharging until it is at 0% power is one complete cycle.
After 500 cycles, the power bank retains 70 – 80% of its original power.
a. The below chart shows 10 complete charging cycles:
Capacity
Charging
Discharging
b. The chart below shows the results after 500 charging cycles:
4.
What are the benefits of the power bank’s “Six-way Smart Protection Mechanisms”?
A. Overcharge Protection: Detects when the battery is full, and automatically stops charging in
order to protect the battery.
B.
Over-Discharge Protection: When the battery is low, the device will automatically stop
charging the phone in order to protect the battery.
C.
Over Temperature Protection: Detects if the battery temperature exceeds 60 degrees, and
stops charging and discharging in the event of overheating.
D.
Short-Circuit Protection: Detection of abnormal current or voltage at any time stops the
power automatically .
E.
Overvoltage Protection: On the power input (Micro USB ) charging port, any situation with
aberrant voltage will result in power automatically turning off.
F.
Over Current Protection On the power output discharging (USB AF) port, if there is an
abnormal amount of output current, power will automatically stop in order to protect the
device being charged.
5.
How do I charge the power bank?
ADATA power banks can be charged by a standard USB connection, from a desktop or notebook
computer, or from a USB powered wall outlet.
6.
Should I wait until the power bank is fully discharged before recharging it?
Many power banks use an 18650 or Li-Polymer battery, and if they are completely discharged
before charging it can lead to a reduction in the battery lifespan. Since ADATA power banks have
over-discharge protection, there is no danger to the battery if the power bank is fully discharged.
However, it is recommended to charge the power bank soon after it has completely discharged, in
order to keep the power bank in an optimum condition.
7.
If the power bank is not used for a long time, how long will it need to recharge?
It is recommended to complete a full discharge and recharge cycle on the power bank every 3 – 6
months. Exceeding this time period may cause the battery capacity to be reduced or the life
expectancy shortened.
8.
Most power bank manufacturers are insured, does ADATA carry similar insurance?
ADATA places a strong emphasis on electrical safety. All the company’s power banks are covered by
product liability insurance in the amount of US$ 500 million. This applied to all purchasers of
ADATA products, providing customers with extra peace of mind.