Pros
Our editorial view of this model’s strengths and limitations.
OSCAL TANK 1 has a 20000 mAh battery. That capacity is handy for trips and long navigation sessions, giving you more flexibility between charges. Actual battery life still depends on screen brightness, signal strength and workload.
The secondary rear screen lets you check the time and basic information while the phone lies face down. It is a small but handy detail for a desk or workspace.
A separate infrared camera helps you see objects in the dark. It is handy for checking equipment or your surroundings, although its monochrome output is different from ordinary colour night photography.
The stated IP68/IP69K protection is useful around dust and rain when working outdoors. This makes the phone worth considering for travel and field work where a conventional slim phone would need extra protection. The rating does not make it immune to every drop.
Fast charging at up to 55 W makes it easier to top up the large battery during a stop or break. Reaching that power requires a compatible charger and cable. Charging slows as the battery approaches full.