This lightweight, extremely portable power bank is designed to withstand the harsh temperatures of higher altitudes and resist thermal expansion and shrinkage. This not only protects the NC10000 but also your precious electronics from any devastating loss of power, short circuit, and overcharge, overheat etc. electrical problems. Additionally, the NC10000 is rated IPX5 water resistant so it can even perform in the rain! Whether it is a once in a lifetime trip, or the everyday grind, don´t leave home without the NC10000.