This two-in-one product is both a hand warmer and a power supply. When connected to a mobile end device, the appliance provides constant warmth. An integrated temperature sensor switches it off automatically when a temperature of 60 degrees centigrade is reached. When required, the device functions also as a portable battery and reliable charger, for example, for a mobile phone. The exterior is of anodised aluminium, has a pleasant feel and is crafted with laser engraving.