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Power Bank :

A power bank is a portable device used to store electrical energy and charge other electronic devices like smartphones, tablets, smartwatches, Bluetooth headphones, and more when a traditional power outlet is not available. It acts as a portable battery charger, making it an essential accessory for people on the go.


Key Features of Power Banks:

  1. Battery Capacity (mAh):

    • Measured in milliampere-hours (mAh), it determines how much charge the power bank can store.

    • Common capacities include 5,000 mAh, 10,000 mAh, 20,000 mAh, and 30,000 mAh or more.

    • Higher capacity = more charging cycles or ability to charge larger devices.

  2. Input & Output Ports:

    • Usually includes USB-A, USB-C, or Micro-USB ports.

    • Some advanced models support fast charging and dual/multi-port output.

  3. Charging Speed:

    • Some support Quick Charge (QC) or Power Delivery (PD) technology for faster charging.

    • Output is measured in volts (V) and amps (A), e.g., 5V/2.1A.

  4. Design & Portability:

    • Compact, lightweight, and easy to carry in a pocket or bag.

    • Some feature LED indicators, digital displays, or built-in cables.

  5. Safety Features:

    • Overcharge protection

    • Short circuit protection

    • Temperature control

    • Auto shut-off after full charge


Common Uses:

  • Charging phones while traveling, commuting, or during emergencies

  • Powering USB gadgets (e.g., fans, lights, speakers)

  • Essential during power outages

  • Useful for students, professionals, travelers, and outdoor enthusiasts


Popular Power Bank Brands:

Mi (Xiaomi), Realme, Samsung, Anker, Ambrane, boAt, OnePlus, and FINGERS.


Advantages:

  • Portable and reliable backup power source

  • Compatible with multiple devices

  • Helps stay connected anytime, anywhere

  • Available in various capacities and price ranges