Day-11


 A power bank is a portable device that stores energy in rechargeable batteries, typically lithium-ion or lithium polymer. It is used to charge electronic devices like smartphones and tablets. Key components include:

  • Battery: Stores energy, with capacities ranging from 2,000mAh to over 30,000mAh.
  • Input/Output Ports: For charging the power bank and connected devices (USB-A, USB-C).
  • Control Circuit: Manages charging, discharging, and safety features like overcharge protection.
  • Types: Includes standard, solar-powered, and wireless models.

Power banks support fast charging technologies (Quick Charge, Power Delivery) and often include safety features like short-circuit protection and temperature control.

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