Diesel On Full Guard 2.5 Review


Diesel On Full Guard 2.5 is an option usable by users loyal to the brand. For all others, it’s worth looking for alternatives.


  • Colorful and clear display
  • Rich functionality set
  • Bold design

The inconvenients

  • Disappointing battery life
  • Poor activity tracking
  • Dull performance

Key specifications

  • Price of examination: $356.64
  • 1.4 inch circular OLED screen
  • 24mm quick-release webbing
  • Optical heart rate sensor
  • Swimming event at 5ATM
  • Snapdragon Wear 2100
  • Magnetic charger
  • 300mAh battery
  • Built-in GPS
  • Wear OS

If you love your big, raucous and brutal smartwatches, then this Fossil Group Diesel brand plug should be for you. This portable designer makes the Apple Watch 4 and Fitbit Versa look positively tiny in comparison.

The Diesel On Full Guard 2.5 (try to pronounce that name five times faster) is part of Fossil’s fourth-generation line of clothing and is the second watch released under the Diesel brand.

It shares many of the same technologies as other fourth-generation Fossil watches, like last year. Emporio Armani Connected and the Skagen Falster 2 although with distinct styles on both hardware and software.

Design – Diesel On Full Guard 2.5 embodies the bold image of the brand

What really sets this watch apart from the crowd is its design. While some smart watches look like minicomputers on the wrist, the On Full Guard 2.5 looks a lot like a traditional watch.

The metal body is incredibly chunky, with three buttons (one of which is a rotating crown) located on the side of the sharp 1.4-inch OLED display.

Diesel On Full Guard, Close-Up Knurling 2.5

I’m not the type to make big watches and, as soon as I put it on my watch, it seemed to me inappropriate on my wrists relatively delicate. However, if you have the habit of wearing large watches, such as Diesel’s vast portfolio of non-smart watches (and the Diesel look), you will definitely feel at home.

The watch I studied had the black silicone finish, embellished with knurled metal on the rim of the body and around the buttons of an anodized red treatment – but the On Full Guard 2.5 is available in four distinct finishes that are collectively a mixture of black and silver metal, brushed and polished metal, brown leather and blue accent.

Diesel On Full Guard 2.5 Quick Release Straps

All finishes make the same bold statement, but according to your tastes, you have the option of choosing a more conservative style if you prefer it. Plus, their design allows you to swap the included straps for all equivalent 24mm strips, which is much easier thanks to the inclusion of quick release pins.

Screen – A big screen for a big watch

Depending on how you plan to use your smartwatch, you may spend considerable time looking at this circular screen. At 1.39 inches, it’s one of the largest screens available on a Wear OS laptop (its predecessor had a 1.4-inch display), which means text and iconography are easily readable. The resolution of 400 x 400 does not hurt either.

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Diesel on Full Guard 2.5 weather

The use of AMOLED technology means that it is pleasant and dynamic and that the contrast is correct. I would say that the maximum brightness could be improved so that viewing the watch in full sun was a little easier, but it is still possible to see the screen in most scenarios.

OLED technology also supports the Watch’s Always On feature, which I prefer because it allows you to control the time even more instantly, compared to waiting for On Full Guard to detect that you’ve lifted the watch. wrist to turn on the screen.

Software – Wear the operating system with a real character

As a product of the Fossil Group, this smart watch sports software and internal software virtually identical to those of alternatives such as the Skagen Falster 2 and from last year Emporio Armani Connected. Most brands differentiate their experiences with unique dials or dial customization options, but Diesel has moved things forward.

Diesel On Full Guard 2.5 TONI

The T-ON-I wizard was presented with the original On Full Guard smart watch and returns for the second release of Diesel in Wear OS. It retrieves the data you probably want to keep an eye on, such as the current weather or your footsteps, but presents them with a ‘voice’ personified at once indifferent and impertinent.

It’s Diesel’s attempt to put more character into a first functional experience, and I think the team behind T-ON-I did that. On more than one occasion, I snorted at the news of the imminent rain and the suggestion of the watch that there was nothing worth going outside. I also mocked his derision on my footsteps, even though we were not even halfway through the day.

Diesel On Full Guard 2.5 quick settings

Beyond the style of Diesel, the On Full Guard uses the Google usage system of Wear. We’ve seen a lot of updates recently, with an easier-to-navigate user interface and improved features from Google Fit, both of which were absolutely necessary, but there is still work to be done to provide a smoother user experience. consistent.

Quality and optimal features – Always unsatisfactory familiar material

Like other recent editions of Fossil Group, the On Full Guard 2.5 features adequate water resistance (with swim tracking), an integrated GPS for track more accurately your runs, an optical heart rate monitor and a support for Google Pay via NFC.

Being able to quickly scan your wrist on contactless terminals to pay for your purchases is one of the coolest features of the smartwatch and one of my favorite use cases for apparel in general. Like many of its siblings, On Full Guard’s NFC reliability is not as robust as that of Apple Pay on Apple Watch, making it a tougher recommendation for everyday use.

Diesel On Full Guard 2.5 Heart Rate Sensor

With respect to fitness monitoring, even though the traceable activities listed in Google Fit continue to grow, people looking for reliable metrics should not rely on the proposed hardware. It’s good for tracking and the heart rate sensor is not so far away from other optical wrist trackers, but for those who are serious about fitness, opt for clothing devices from devices have a pedigree, like Garmin and Fitbit.

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The Snapdragon Wear 2100 is the portable processor of choice for virtually every Wear OS smartwatch. The problem is that it is an aging chip (released in early 2016) and other modern smartwatches, like the Diesel On Full Guard 2.5, which is starting to appear. As such, the software is slow and sometimes the diesel engine crashes, requiring several restarts or, at the very least, the desire to remain alone for several minutes while trying to unravel any confused treatment.

Since then, Qualcomm has launched the Snapdragon Wear 3100, but with improvements focused entirely on energy efficiency, the question of whether the choice of a newer chip would improve One Full Guard’s bugger performance remained unresolved.

Battery – The Smallest Diesel On Full Guard 2.5 Cell Is Not Auspicious

Perhaps more with smartwatches than on phones, the mileage will vary depending on your usage patterns. The capacity of 300mAh of On Full Guard 2.5 is a significant downgrade compared to the cell size of 370mAh of its predecessor, which has not already achieved such an impressive battery life.

Using the ready-to-use settings, with items such as touch screen and touch activation, I ended each day at around 55%, provided I switched to battery saving mode the evening. . If you add the use of NFC technology to the mix, you will see a noticeable drop, with On Full Guard ending each day at 35%.

Diesel On Full Guard 2.5 on the wrist pocket

The commercial use of NFC for constant monitoring from the optical heart rate sensor will leave you around 45% by the end of the day, and as always, the biggest killer of portable battery life is the use of integrated GPS which, although practical, has a heavy 6% after just 15 minutes of following a race.

As mentioned earlier, I like to tune my smartwatch screen anytime, if at all, which goes with my lightweight NFC on the London transport network and a touch of GPS tracking for about ten minutes to log my walk home, which represents a low 23% left in the tank at the end of the day.

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It’s unclear why Fossil dropped the battery capacity between the 1 and 2 generations of the Diesel On Full Guard, but in the real world it does not benefit the user in any way and effectively stifles the capacity of the battery. use of the features of the watch. assuming you want to go to the other end of the day with the thing that is still turning (metaphorically).

The improved design of the Fossil charger relies on magnets to attach the charger to the back of the watch body, but now uses a direct connection between two points of contact on the charging base and two concentric charging rings. on the underside. full custody.

This means that you can still charge the watch in any orientation, but it is much less likely to misalign or accidentally detach, making recharging more reliable.

In 30 minutes, the On Full Guard 2.5 fills its load to 47%, in one hour it reaches 85% and the watch fills up after a full hour and a half – very slow for a device as small, but at Speed ​​emphasizes the value of the fast charging technology offered by most modern smartphones.

Should I buy the Diesel On Full Guard 2.5?

As with the rest of the latest generation of Fossil Group watches, the Diesel On Full Guard 2.5 is well supplied with features, fulfilling all the important criteria you expect from a smartwatch of the current generation. But if the image presented is a daring image of confidence, with its distinctive style and character wizard, T-ON-I, there are runtime issues.

Diesel on Full Guard 2.5 on rail

Scratch the surface of the Diesel brand and the underlying material just is not good enough, especially for the asking price of £ 300. The chipset is too old and too slow, the tracking of the physical condition is imprecise and the life of the battery is average.


For those who are committed to the name Diesel looking for a smart watch that is not an Apple Watch, you will find something to satisfy your desires without feeling completely defrauded. For those who do not respect this fidelity, the Diesel On Full Guard 2.5 is a usable option, but not a choice of choice.

Diesel On Full Guard 2.5 Review
Diesel On Full Guard 2.5 Review 1

For those who are committed to the name Diesel looking for a smart watch that is not an Apple Watch, you will find something to satisfy your desires without feeling completely defrauded. For those who do not respect this fidelity, the Diesel On Full Guard 2.5 is a usable option, but not a choice of choice.

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