Power banks are the easiest gadget to neglect. You charge them, stick them in a drawer and then only pull them out when you need to travel or when the power's out. Which is why it's easy to miss when your power banks are outdated or no longer suitable to have your back when you need them most.

For the longest time, smartphone battery life was a real issue. I remember my first few smartphones basically traveling with me from charger to charger. They would charge at my desk, charge in my car, and charge next to my couch. While phone battery life is now much better, the real revolution has come from fast-charging.