Xtorm is a Dutch company that focuses on all kinds of chargers. For example, they have different types of power banks, from small models to large devices to also charge your laptop. How often you charge your device with a power bank depends on the battery capacity. For example, a 10,000mAh power bank provides your smartphone with 2 to 3 times power. In addition to power banks, Xtorm also has a number of chargers and charging cables. You can also buy car chargers or a phone holder for your car.