... phone to avoid out of power when we’re going2) Heater heating process is very fast, from the start to 40 ... 1 minute 3) Prolate oval shape, feel good.4) The heater body is built-in 2pcs iPhone original batteries and repeat ... times. It also support battery replacement. The top of the heater is a data interface, which can connect with different line ... , iPod and so on. It is enough to carry egg heater.