Garmin has announced a new version of its ultra-long stamina watch, the Garmin Enduro 4.

Already a Garmin Enduro 3 owner? The good news is you probably won’t feel compelled to upgrade instantly, although there are some significant changes with this generation.

Battery life remains the same, though. The Garmin Enduro 4 is rated for up to 90 days of use, and has the same two stamina-boosting key features that are hallmarks of the series: solar charging and a battery-saving MIP display.

One obvious spec change is a doubling of storage, from 32GB in the Enduro 3 from 2024 to 64GB in the Enduro 4. This will allow for more map data to be downloaded to the watch, or extra music and podcasts if you’re more concerned with entertainment.

Other changes also tie into the maps angle. The Garmin Enduro 4 has 50 per cent more RAM, which should help make scrolling across maps feel more fluid.

This series gains Garmin’s latest mapping back-end, as seen in the Garmin Fenix 9 Pro , despite having a MIP screen rather than the glossier OLED kind. Perspective Maps is one of the key elements in this next-generation maps presentation, designed to let you see what’s ahead more clearly.

Tracking of rowing and rucking sessions is improved too, which Garmin mentioned alongside the Fenix 9 Pro’s release.

The Enduro 4 effectively sees Garmin bring the Enduro series in-line with its latest releases here, without doing anything too dramatic to the wider feature set.

This does include netting a few software elements not currently found in the Enduro 3. For example, it has Epic, a way to group together activities into a share-able summary with photos. It’s ideal for those hiking weekends where you want to be able to package up your sessions into one neat format.

Other familiar hardware elements include 10ATM water resistance, integrated LED flashlight and Sapphire display protection for its 1.4-inch MIP display.

The Garmin Enduro 4 weighs 66g, which is a fair amount for a wearable but rather light for a 51mm diameter one. As in the last generation it has a mixed materials construction, combining a largely polycarbonate plastic casing with a titanium bezel.

Unlike other Garmin ranges the Garmin Enduro 4 comes in one key spec and size, which costs $899 and will be available to order from October 9. It matches the launch cost of the Enduro 3, which remains on sale for now at a reduced price of $799.