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Power bank is a portable, rechargeable battery that stores electrical energy to charge electronic devices like smartphones, tablets, and laptops when you are away from a wall outlet. [1, 2, 3, 4, 5, 6]
You charge the Power Bank beforehand by plugging it into a wall socket. It holds that electricity until you need it. When your phone or gadget runs low on battery, you connect it to the power bank using a USB cable or place it on a wireless charging surface. [1, 2, 3, 4, 5, 6]
How It Works
Internal Battery: Inside the device, lithium-ion or lithium-polymer cells store the electrical charge.
Control Circuitry: A small internal computer regulates voltage and current to keep your devices safe from overcharging.
Ports: Output ports (like USB-A or USB-C) transfer the stored power to your electronics. [1, 2, 3, 4,