The short battery life of our smartphones has always been a serious concern in our daily lives as we are very dependent on our mobile devices. From receiving calls to sending important emails to digging deep into Amazon Kindle to read our favorite book, everything squeezes every last drop out of your smartphone’s battery. And we lay our hands on a Power Bank – a breakthrough portable battery technology that keeps our gadgets alive and makes the batteries last a week while we’re away from a power outlet.
Power banks are the fast-charging portable batteries that use a dedicated Mini or Micro-USB input socket to receive power from a wall socket adapter and a full-sized USB socket for discharging the power to our devices when we”re on the move. A single unit of power bank has an input port, charging circuit, battery, discharging circuit, output port and indicators.
The input port serves as a connecting point which charges the power bank for energy storage using its charging circuit. Also, it regulates the voltage and current supplied to the battery, which is the primary energy storage element and required to charge up our mobile phone. The discharging circuit functions very similar to the charging circuit and safety cut-off the power flow to prevent overcharging and overheating. Output port connects power bank with smartphones and indicators help in visual monitoring.
Available in various sizes and shapes, these devices work on rechargeable lithium battery fitted inside them in a protective casing, which is guided by a printed circuit board (PCB) to control power flow and allow our device to access stored electrical energy using built-in batteries through a USB port. Technically, the rechargeable battery is based on lithium technology which is further categorized as:-
- Lithium-ion: Lithium-Ion batteries are popular for their higher energy density as they are designed to store more electrical charge in a given size or volume. These power bank batteries are quite cheaper to manufacture and often, they’re prone to ageing issues.
- Lithium-polymer: In Lithium-polymer power banks, you are safe from ageing to the same extent, but they’re comparatively expensive and may not suit all budgets.
Our pick for best Power Banks to buy in India