A power bank is a portable battery that allows you to charge your electronic devices, such as smartphones, tablets, or laptops, while on the go. It works by storing energy that you can use to recharge your devices via a USB cable.

The number of charges depends on the power bank's capacity (measured in milliampere-hours or mAh) and your smartphone's battery capacity. For example, a 10,000 mAh power bank can charge a 2,500 mAh smartphone about four times.

The recharge time for a power bank depends on its capacity and the type of charger used. Generally, a 10,000 mAh power bank takes between 4 to 6 hours to fully recharge with a standard charger.

Yes, you can use your device while it’s charging with a power bank. However, this may extend the time needed to fully charge your device.

To choose the right power bank, consider the capacity you need, the number of charging ports, the size, weight, and additional features like fast charging or overcharge protection. If you have multiple devices to charge, opt for a power bank with a higher capacity.

Most power banks are compatible with all devices that charge via a USB port. However, some newer devices may require specific technologies, like fast charging, which may not be supported by all power banks. Always check the specifications of your device and the power bank before purchasing.