GARMIN ENDURO

In the running watch arms race, battery life is a fierce battleground. Even budget trackers now last weeks between charges. However, with an 80-hour GPS battery life, extendable up to 300 hours in endurance mode – all boosted by juice-saving solar charging – the Garmin Enduro has just blown away all of its rivals.

The Enduro is basically a Fenix 6 that won’t die. It’ll survive even the most extreme multi-day ultra running adventures, while hour-a-day run streakers can expect at least a month from a single charge.

This run buddy also comes loaded with Garmin’s best adventure-tracking smarts, including new trail-adjusted VO2 fitness estimates and an ultra running mode that clocks how long you dawdle at aid-station buffets. Plus you get adaptive workout suggestions, remote live tracking and all the usual heart/blood stats.

The only things missing are maps and offline music. But with automatic Wi-fi syncing, a crisp screen and 100m waterproofing, the Enduro is the closest you’ll get right now to the ultimate running watch… if you can afford it and you’ve got big enough wrists. from £700 / garmin.com