The Amazfit Active Max and the Garmin Forerunner 165 approach the affordable sports watch from opposite directions. One mounts a 1.5-inch AMOLED panel inside a 48mm case and promises up to 25 days between charges, while the other trims its chassis to roughly 43mm and channels two decades of the Garmin brand's running science into a lighter package. Choosing between them comes down to how you train, not which spec sheet looks longer.

The table exposes the central trade-off immediately. The Amazfit Active Max wins on raw endurance, screen real estate and offline navigation, while the Forerunner 165 counters with a lighter chassis and a training platform built specifically for runners. Neither watch is universally better; each is optimised for a different buyer.

Battery Endurance: Where the Amazfit Active Max Pulls Ahead

The headline figure is difficult to ignore. Amazfit rates the Active Max at up to 25 days in typical smartwatch use, a number that shifts the daily charging ritual into a fortnightly one. For anyone who has abandoned a fitness tracker because the charging cable became a nightly obligation, that single specification changes the ownership experience more than any sensor upgrade could.

That endurance comes from a combination of a large 48mm case, which accommodates a bigger cell, and power management tuned for the 1.5-inch AMOLED panel. The Amazfit Active Max Smart Watch 1.5" 48mm GPS also carries 4GB of onboard storage and support for offline maps, so navigation data lives on the wrist rather than depending on a tethered phone. In practice this suits hikers, travellers and multi-sport users who move between environments and cannot guarantee a charger at the end of each day.

Training Depth: The Garmin Forerunner 165's Real Advantage

Garmin approaches the same price territory with a narrower but deeper proposition. The Forerunner 165 is a running watch first, and its value sits in the metrics layer rather than the hardware count. VO2 max estimation, recovery insights and race prediction are the features that separate a Garmin from a generic fitness band, and they are exactly the tools that structure a training block.

The watch requires wrist-based heart rate or a compatible chest strap to display VO2 max, a detail documented in Garmin's official Forerunner 165 owner's manual. That dependency matters: serious runners who want accurate effort data during intervals typically pair the watch with an external strap, and the Forerunner ecosystem supports that workflow natively.

Physical dimensions reinforce the intent. Garmin lists the case at 43 x 43 x 11.6mm with a wrist circumference fit range starting at 126mm, making it one of the more compact options in the current lineup. A Garmin Forerunner 165 Running Colorful AMOLED Black therefore sits flatter against the wrist during long runs, and the lighter build reduces the arm-swing penalty that larger watches introduce over distance.

Display and Daily Wearability Compared

Both watches use AMOLED panels, so the difference is one of scale rather than technology. The Active Max devotes 1.5 inches of diagonal space to its screen, which benefits map reading, workout data fields and notification review. The Forerunner 165 keeps its display proportionate to a 43mm case, prioritising glanceability over immersion.

This is a genuine lifestyle split. A 48mm watch reads as a statement piece and works well over a jacket sleeve or with casual clothing, but it can crowd a dress shirt cuff and may feel intrusive during sleep tracking. The 43mm Garmin disappears under most sleeves and is easier to wear overnight, which matters because sleep and recovery data are only useful when the watch stays on the wrist through the night.

• Choose the larger screen if map navigation, data-rich workout screens and media storage are priorities.
• Choose the smaller case if continuous overnight wear, running comfort and a low-profile look matter more.
• Check wrist circumference before buying either model, since fit range determines comfort across a full training week.

Health Monitoring, Water Resistance and Everyday Use

Garmin bundles a broader health suite into the Forerunner 165, including Pulse Ox, Body Battery energy monitoring and stress tracking. These features are part of what Garmin describes as standard across its current watch range, and they give the device a second life as an everyday wellness tracker rather than a training-only tool.

The Forerunner 165 carries a 5 ATM water resistance rating, sufficient for swimming and showering. The Active Max is also built for water exposure and lists a water-resistant construction suited to pool sessions and wet-weather running. Swimmers who train in open water should verify depth ratings against their specific activity before committing, as resistance ratings describe pressure tolerance rather than diving capability.

The wider Amazfit lineup positions the Active Max as a lifestyle-forward option, with 170+ sport modes covering activities far beyond running. That breadth appeals to users who rotate between gym work, cycling, hiking and racket sports and want one device rather than a specialist tool.

Apps, Ecosystems and Long-Term Ownership

The companion app defines how a watch feels after the novelty fades. Amazfit pairs the Active Max with the Zepp app, which handles workout review, sleep analysis and watch face management in a clean, general-purpose interface. Garmin Connect is more granular, with deeper post-run analysis, training load history and structured workout building that runners tend to rely on across a full season.

Storage is another practical divider. The 4GB on the Active Max supports offline media and map data without a phone nearby, while the Forerunner 165 focuses its storage on music on selected variants rather than general file capacity. Athletes who train without a phone should decide early whether offline maps or offline music matters more.

Which Watch Should You Actually Buy

The decision rests on three questions. How often do you want to charge? How specific is your training? How large a watch will you tolerate on your wrist every day?

If the answers point toward infrequent charging, a big display and offline navigation across many sports, the Amazfit Active Max answers all three. It is the better companion for travel, hiking and anyone who has grown tired of a nightly charging routine.

If the answers point toward structured running, lightweight wear and data that guides a training plan, the Forerunner 165 is the stronger instrument. Its metrics, companion app and compact chassis were designed around a single purpose, and that focus is exactly why runners keep returning to the platform. Both watches serve their owners well; the correct choice is the one whose strengths match the week you actually live.