If you use your smartphone a lot when you're on tour, it's hard to avoid topping up the battery. A power bank with 5000 mAh is sufficient in almost all cases. The NB Air from Nitecore, which has an impact-resistant carbon fibre chassis, delivers this much. Although it costs 45 euros, it is not only rainproof, but also so small and light that it is not a burden even when climbing multi-pitch routes...

If you use your smartphone a lot on tour, it's hard to avoid topping up the battery. In almost all cases, a power bank with 5000 mAh is sufficient, which is how much the NB Air from Nitecore, which has an impact-resistant carbon fibre chassis, delivers. Although it costs 45 euros, it is not only rainproof, but also so small and light that it is not a burden even when climbing multi-pitch routes or...