What
you need to know about Power Banks
Safety
is the key to choosing the right Power Bank
The
main component of a power bank is a lithium ion / lithium polymer battery.
Although these types of batteries are commonly used, the safety of battery
product is always the utmost concern. Power Bank safety can be addressed on two
fronts:
1.
Battery Quality Grade A is a general concept used to denote a very good quality
battery. The real test is whether or not the battery has a UL
Certification. Though all our power banks have many certifications,
our most popular power bank batteries have passed the UL 1642 test which is a
set of rigorous Electrical, Mechanical, Environmental, and Fire Exposure Tests.
UL is the most widely accepted certification that denotes a battery’s
compliance with recognized safety requirements in North America.
2.
Protective Circuitry The Protective Circuitry or PTC is considered a “ Safety
Valve”. It protects the equipment, the charged device, and user. PTC prevents
Internal and External Short Circuit, Abnormal Charge/Over Charge, forced
Discharge, and more. It’s easy to reduce the costs of power banks
by cutting out the cost of battery certifications and protective circuitry. But
doing so creates a tangible risk to the safety of the power bank, the phone and
other charged devices, and even harms the user. Before you purchase a power
bank, talk to your seller about their product safety certifications.
What does Power
Bank Capacity mean?
Power
Bank capacity refers to how much charge is inside a power bank battery. It is
measured in mAh or milliamps per hour. When a power bank is charging a phone,
some of the charge is lost in the transfer of power. In simple terms, it takes
energy to transfer energy. So, the real capacity is about 62.9% of the battery
capacity listed on the outside of a Power Bank that has a high quality battery.
For example, a Power Bank with a quality battery at 2200mAh has a real capacity
of 1380mAh. 820mAh is lost in the transfer of energy. For Power Banks with downgraded
batteries, the real capacity is lower because the battery may not work as
efficiently. For example, a downgraded battery may show 2200 mAh on the case,
but the real capacity is actually much less than 1380 mAh.
Does a High
Capacity Power Bank charge a phone faster than a Low Capacity Power
Bank?
The
simple answer is No. The charge speed is determined by output current, not the
capacity. The output current ranges from 500mA, to more than 1000 mA
(1A). If the output current stays the same, High Capacity and Lower
Capacity Power Banks will charge a phone at the same rate. So theoretically, at
the end of an hour, a phone will have as much charge with a High Capacity power
bank as it will with a Lower Capacity Power Bank. A high capacity power bank will
be able to provide more charge than a low capacity power bank over time.
Business Class and Special Class Power Banks provide 1000 mA or larger output
(up to 2 amps) and Economy Class Power Banks provide between 500 mA to 800 mA
(up to 1amp). Most USB ports from your computer provide 500 mA (less than 1
amp).
How many times
can a power bank be cycled?
Depending
on the class / capacity, the power bank can be cycled between 300 to 500
timers. You may keep using the power bank but the capacity will be lower than
the initial size. Be aware that it’s important to store a power bank with at least
a 50% charge. Storing a power bank without any charge may reduce the life of
the battery.
One simple but
important reminder.
To
prolong the battery life, factories only charge battery at 30% to 40% of
capacity. Please remind to fully charge the power bank before usage or functions.
How do I prolong
the life of my power bank?
Avoid
storing power banks in extreme heat or cold environments. Always store your
power bank with at least a 50% charge to prolong the battery life. Storing
while completely drained will reduce the capacity of the battery. Keep power banks
out of reach from children. Do not drop, break, or attempt to disassemble a
power bank. Internal components can be harmful if exposed to skin.
Remember this
procedure when you charge Power Bank via Car Charger
Avoid
connecting a power bank to a car charger before starting the car. Many car chargers
on the market may not be able to handle the sudden peak of output voltage
during the vehicle ignition and it may damage the power bank.
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