Taking your phone on the climb is a good idea to use it as a clock, alarm clock or a camera. However, there are no power outlets to charge your device if the battery dies out. You will need to invest in a powerful power bank or a solar charger to keep your phone active at all times. Batteries drain more quickly at low temperatures, so putting your phone on airplane mode until needed will help to conserve phone battery life. It you own a solar charger, you can tie it somewhere outside your daypack while you walk and the device keeps conserving power. If you’re planning to take a lot of pictures on your phone and listen to music while you walk, then we definitely recommend you to bring a strong power bank or a solar charger for your climb.