So, no wonder my phone bleeped wearily and went kaput just as I started my descent into the cave. I was utmostly cross, believe me. So, what could I do to ensure my phone stays alive and functioning? Sure, I could pack about five heavy duty powerbanks but I don’t want to carry them all. I like to travel light. Enter the OUTXE (Outdoor Extreme Energy) Power bank that will be utterly perfect for adventurers throughout the world.