Will the Descent Mk2S Scuba Diving Computer battery last for a long-distance multi-sport triathlon?

You must ensure your event duration stays under 6 hours or plan for a mid-race recharge. We selected the Descent Mk2S for our full review because it ranks as a versatile watch-style dive computer that supports multiple sports apps.

You can find the technical hardware details in our full Descent Mk2S spec breakdown.

Descent Mk2S battery life limitations during GPS and music tracking

The device supports a 30-hour battery life in dive mode, but the GPS mode with music—which is the most demanding power state for a triathlon—limits the runtime significantly. This distinction matters for scuba diving computer buyers because these devices often prioritize deep-water power over the high-frequency GPS polling needed for land-based endurance sports. While the watch includes heart rate monitoring, pulse ox sensing for blood oxygen saturation, and altitude acclimation, these features share the same power pool as the GPS tracking.

To see how it stacks up against rivals, view the Descent Mk2S comparison analysis.

What to Check Before Buying the Descent Mk2S

• Verify if your specific triathlon requires a continuous GPS track longer than 6 hours.
• Check if your training plan requires a manual restart between swimming, cycling, and running legs, as the data log might reset.
• Confirm your charging setup supports the required power output for quick top-ups between sessions.
• Ensure the 1.2 inch color display is large enough for your specific data fields during high-intensity movement.

Comparing the Descent Mk2S to Other Options

The Descent Mk2S functions as a wrist-mounted computer that tracks underwater depth and heart rate. Buyers who prioritize extreme endurance for land-based ultra-marathons should look at alternatives with dedicated multi-sport battery life exceeding 30 hours. Those who need a primary dive tool that can also handle a standard workout will find this model suitable for shorter distances.

If you are planning a long excursion, learn if the Descent Mk2S lasts a full day of snorkeling.

If you need a device to survive a 20-hour multi-sport triathlon on one charge, you should look at other options. For those who prioritize a dive-ready computer that handles shorter fitness goals, the Descent Mk2S is a strong choice.

Connectivity is essential for some, so see which models let me see my dive data on my phone.

Reviewed by the Scuba Forge editorial team. Scuba Forge writes these guides from the 200 most-reviewed scuba diving computer listings in our retail dataset, not from manufacturer copy.