What is Power Bank?
is a special external battery which works as a charger. That can be used for almost any USB-charged devices like smartphones,tablets,cameras, GoPros, portable speakers and many more. This is increasingly popular device. Power Banks allow us to store electrical energy and later use it to charge mobile and tablet. The best Power Bank are from brands:Dell,Asus,ConnectIT,Lenovo,Kingston,Samsung and HP.
It will lose charge if it is stored in a chilly place or under the scorching sun. Extreme heat or cold may even cause permanent damage to its battery. Power Bank needs to boost the voltage of its internal battery to 5 volts, and a special voltage boosting circuit is used for the purpose. Power Bank´s circuit is where some of the energy is lost, and the losses may exceed 10%, depending on the circuit’s efficiency.Most of that are designed to provide 2 amps of output current.Sometimes is good to discharge and recharge a power bank on a monthly basis.
How it works?
They work the way you would charge and use like a normal cell phone battery. Power banks capacities are quoted in milliamp-hours (Mah), If you will have higher Mah it will be better
How do I charge a Power Bank?
Power Banks must be charged to. Power Bank has a dedicated input socket for receiving power. This power can come from a USB socket on computer. Power Banks use a Mini or Micro-USB socket for charging, and full-sized USB sockets for discharging. it can use the same socket for input and output. This is rare and shouldn´t be assumed of any Power Bank. It can take a quite a while to fill up the Power bank. Some Power Banks don’t work with high-capacity chargers (example is ipad). Most power banks are designed to provide 2 amps of output current
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Types of Power Banks
There are 3 types of Power Banks:
- Universal Power Bank -it comes in many configurations and sizes. It can be tailored to your device requirements and to your budget.
2. Solar-Charged Power Bank – it has photovoltaic panals which . It´s not very fast,but you can use via cable.
3. battery case – this type of Power Banks are handy and they can be narrow compability,but cable chick can´t stock.
How many times can I charge my mobile and tablet?
mobile has approximetly 1300 mah and tablet approximatel 3000 mah. There are 6 Power Banks capacity options
- to 2999 ( you can charge your mobile 2 times to max battery and tablet 0 time to max battery)
- from 3000 Mah to 4999 Mah (you can charge your mobile 3 times to max battery and tablet 1 time to max battery)
- from 5000 Mah to 6999 Mah (you can charge your mobile 5 times to max battery and tablet 2 times to max battery)
- from 7000 Mah to 8999 Mah (you can charge your mobile 6 times and tablet 2 times to max battery)
- from 9000 Mah to 14999 Mah (you can charge your mobile 11 times and tablet 4 times to max battery)
- from 15000 Mah and more 2,1 Mah (you can charge your mobile 16 times and tablet 7 times to max battery)
Sources:
http://www.instructables.com/id/PowerBanks-How-It-Works/
http://www.cablechick.com.au/blog/what-are-power-banks-and-how-do-they-work/
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http://www.phonearena.com/news/Heres-why-power-banks-arent-as-big-as-they-seem-to-be_id67153#1jpCX13vROPM1aBA.99