In the developing world, electricity cuts are sudden and frequent. Having a power bank to keep your electronics charged on the road is an integral tip for backpacking. I’ve done 30+ hour bus and train journeys… when you run out of power, it sucks. Some power banks can be bulky and heavy. Depending on what your electricity needs are, I recommend going with an external battery that has multiple USB ports so you can charge several devices at one time. For long bus/plane/train rides, power banks keep all of your devices charged and ready to go. If you’re on the trails, you can use your power bank for your camera. Don’t forget to charge your power bank before embarking on long journeys!