A portable power bank has a special battery in a special case with a special circuit to control the flow of power. It allows one to store energy and use it later to charge various devices. Power bank plays very crucial role in the modern scientifically developed world because it helps to keep the battery life of our beloved phones, tablets and portable media players are outstripped by the time one use them in usual life. By keeping a battery backup close by, one can top up one’s devices while far from a wall outlet.
They are well for mostly USB-chargeable device(s) such as Camera, Gopros , and Gsp system, Mp3 media players, smart phones, and some tablets can be charged from a power bank etc. means anything that charges from USB at home can be charged from a power bank.
VARIOUS TYPES OF POWER BANKS
1; UNIVERSAL POWER BANK: This type of power bank comes in many sizes and configurations which can be constructed according to one’s requirement and budget.
2: SOLAR POWER BANK: This type of power bank has a Photovoltaic Panels which can trickle-charge the internal battery while placing in the Sunlight and the charging does not work rapidly.
3: OLDER STYLE BATTERY PHONE CASE : This type of battery may be a handy type and has very narrow device compatibility. That is why,cable check does not stock them.
HOW POWER BANK SHOULD BE CHARGED?
Actually, a power bank has an input socket for power gaining, which comes from USB socket on one’s computer but a wall socket adapter provides faster charging. Mostly power bank use micro USB socket for charging and full-sized for discharging .power bank very rarely uses the same socket for input and output. One should always check the manual for specific instructions to deal properly with the power bank and use it up to the maximum extent.
Power bank takes quite a while to fill up such as a 1500 mAh rated power bank should take the time equal to one’s smart phone to charge and for large banks the time may be manifold. Mostly, power banks have an LED indicator to show the capacity of charging and prevent from overcharging or overheating. So it should be used properly to save power bank from any type of damage.
HOW LONG DOES A POWER BANK LAST?
There are two important aspects of this question.
1: How many number of charge/discharge cycles in a life of power bank takes place.
2: How long a power bank can retain it charge in the case of not in used.
The answer of the first question is that it depends on the quality of internal components and their manufacturing. One should not stock those power banks which have the capacity of charging of less than 18 months. This would allow one to charge a device from the power bank every day for a 1.5 years. Actually it is a fact that the expensive one has a larger capacity of charging and vice-versa. The power bank is normally not used every day. Therefore, it lasts longer than its reserved or expected capacity.
The answer of the second question is that the charge capacity depends on the quality of the controller circuitry and battery Cells. A high quality power bank may hold charge from 3 to 6 months, while, the lower quality one may retain a charge for round about 6 weeks.
HOW MANY TIMES A POWER BANK CAN CHARGE A DEVICE??
Most of the time people judge the capacity of a power bank on the basis of an average formula which assumes an average capacity of 1500 mAh, a device which has a power of not less than 20% and 80% efficiency rate .Many power banks boast efficiency rating up to 90% but the reality is bitter to swallow.
FORMULA
Power bank rating (mAh).(efficiency) .(device depletion) divide by (device capacity (mAh)
EXAMPLE
(6000)(.8)(.8)/1500=2.5 Charges (approximately).
