Tag Heuer Connected Calibre E5: Everything We Know So Far

Tag Heuer is preparing to launch the Connected Calibre E5, the next iteration of its luxury sport smartwatch line. The Calibre E4 already positioned itself as a premium Wear OS option for athletes willing to pay north of $2,000, and the E5 is expected to push further into serious training territory.

The big question for endurance athletes is battery life. The E4 struggled to crack 24 hours with GPS active, which is simply not competitive against a Garmin Fenix 7 (up to 57 hours GPS) or even a Coros Pace 3 (38 hours). If Tag can close that gap meaningfully with the E5, it changes the conversation for triathletes and long-course runners who actually want to race in it.

On the sensor side, expect an upgraded optical heart rate module and likely improved GPS chip performance. The E4 used Wear OS 3 with a Snapdragon W5+ Gen 1, which gave smooth UI performance but drained the 440mAh battery fast. The E5 will need either a significantly larger cell or smarter power management software to compete on a training-watch level.

Tag has never fully cracked low-battery GPS accuracy degradation, a problem Garmin has also quietly struggled with on certain Fenix and Epix models. Whether the E5 addresses that with smarter duty-cycling or a new chipset is still unknown. Polar and Coros have handled this better on far cheaper hardware.

Verdict: The Calibre E5 looks promising on paper, but Tag needs real battery gains to justify the price tag for athletes. Style is not enough.