A hand crank phone charge has its place for anyone travelling in the wilderness. While carrying a powerbank might be wise, what happens when it runs out? If you are heading out past the edge of civilisation, you might consider investing in a hand crank phone charger.
However, as you are literally trading your calories for electricity. they also require a bit of muscle power to get a decent charge, and so are not to be relied on for day-to-day charging, unless you live in a wilderness cabin.But when your phone dies, these can be give you just enough juice to make an important call.
This could be the difference between being able to make an emergency phone call, or not…. and is not reliant on the weather or time of day like solar chargers. This makes them useful for camping tips, hiking expeditions, and emergency situations like power outages.