Rollme PowerMax: durable outdoor smartwatch with 35-day battery

Rollme has unveiled the PowerMax, a smart watch aimed at outdoor enthusiasts. Its headline feature is a 1,100 mAh battery that delivers up to 35 days on a single charge and more than 100 days in standby. Priced at just $29.99, PowerMax lands among the most affordable long-lasting wearables, and the value proposition is hard to miss.

The watch uses a 1.7-inch IPS display with 360×360 resolution and hardened, scratch-resistant glass. The screen stays legible even in bright sunlight, which makes it practical beyond the spec sheet. The zinc-alloy case meets the MIL-STD durability standard and carries 5ATM protection, so swimming or training in the rain is on the table. A built-in LED flashlight comes in handy for night rides or hikes when every bit of light helps.

For connectivity, PowerMax supports Bluetooth 5.2, includes a speaker and microphone, and lets you take calls right from your wrist. There’s also a built-in compass with dual calibration. On the health side, the watch offers real-time heart-rate monitoring, blood oxygen tracking, blood pressure readings, and sleep quality insights—covering the essentials most people look for first.

The model supports a range of sports modes, including strength training, mountaineering, surfing, and game-based sports. It can generate muscle-load heat maps and suggest optimal exercises to keep sessions focused. Extras include music controls, weather forecasts, alarms, and guided breathing exercises. Charging is handled via a magnetic connector, keeping the daily routine simple.