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Battery arithmetic for a day in the saddle

Navigation, a route file and a camera use more power than a pocket-sized phone expects. Estimating hours rather than kilometres is the more honest calculation.

When the route file and the street disagree

Roadworks, one-way systems and a bridge closed for repairs are the ordinary reality of city riding. Two offline maps and a willingness to look up are worth more than a perfect plan.

Mount, case, cable: the small hardware that decides the day

A phone that overheats in the sun or rattles loose on cobbles ends the navigation. Inexpensive fittings solve most of it, provided they are fitted before departure.

Short breaks measured in rides, not sights

A city seen from a bicycle is a different city: shorter distances, more districts, and data used in bursts at junctions rather than in a hotel room.

Data for a riding holiday, sized honestly

Navigation is light, photographs are not. A modest allowance covers a week of riding if uploads wait for wifi, and disappears quickly if they do not.