UniHertz Tank 3 Pro Review: A Rugged Phone With a Built-In Projector

Introduction

The UniHertz Tank 3 Pro is a smartphone built for scenarios where most phones would fail. At roughly the size of a brick and weighing significantly more than a standard flagship, it packs a 23,000 mAh battery, a built-in DLP projector capable of displaying a 40-inch image, a 1200 lumen LED flashlight, night vision capabilities, an IR blaster, and a full suite of rugged construction features. Priced at $700, it represents a deliberate departure from the minimalist design philosophy that dominates the smartphone market. This is a phone designed for off-grid nomads, outdoor enthusiasts, and anyone who values function over form.

Design and Build Quality

The Tank 3 Pro’s physical presence is immediately striking. Holding it feels like gripping a brick or three standard smartphones stacked together. The device measures 6.88 inches diagonally with an LCD display running at 120 Hz, surrounded by thick rubber bumpers at each corner and metal side rails that are individually replaceable. The back panel is brushed aluminum, and the overall construction uses metal and durable rubber throughout.

The phone features a temporary screen protector over its glass surface, which scratches at level six on the hardness scale with deeper grooves appearing at level seven. This is standard for smartphone glass. The fingerprint-scanning power button is located on the side and shows scratches from regular use, which is expected for a device designed to be used in harsh conditions. Above the hole-punch camera sits a metal earpiece speaker grill that appears secure and well-integrated into the frame.

One notable design choice is the inclusion of a 3.5mm headphone jack at the bottom, alongside a 120W USB-C port and a watertight flap. The left side houses the projector focusing dial, volume buttons, and two custom buttons, one of which activates the camping light. The SIM card tray is notably long, accommodating two SIM cards and a microSD card slot, a feature that contrasts sharply with the trend of removing expandable storage from flagship devices.

The Projector Experience

The built-in DLP projector is the Tank 3 Pro’s most distinctive feature. When activated in a bright environment, the projected image appears somewhat washed out, but in a dark room, the image quality becomes surprisingly good. UniHertz does not publicly specify the projector’s resolution, so the exact output remains unclear. The projector uses a rotatable focusing knob on the side to adjust image clarity, and the lens is protected by glass.

The projector is powered by ultra-bright LEDs that shine through a series of prisms and mirrors before reaching a DLP chip that generates the image. The entire projector module is smaller than the active cooling system that keeps it from overheating. In practical terms, being able to project a 40-inch display from a pocket-sized device is a genuinely novel capability, particularly useful for travelers or anyone working in remote locations where a portable screen would otherwise be impractical.

Camera System and Night Vision

The Tank 3 Pro features four rear cameras: a 200-megapixel main sensor, a 50-megapixel wide-angle lens, an 8-megapixel telephoto, and a 64-megapixel night vision camera. None of the cameras include optical image stabilization, which is a notable omission for a device at this price point and intended use case.

The night vision system uses four infrared diodes positioned next to the night vision camera. These infrared lights are invisible to the human eye but visible to the camera sensor, allowing the phone to capture black-and-white images in complete darkness. This capability mirrors technology found in space telescopes and specialized imaging equipment, making it genuinely useful for low-light scenarios.

The front-facing camera is a 50-megapixel sensor protected by glass, positioned in a hole-punch cutout at the top of the display.

Internal Engineering and Cooling

The Tank 3 Pro’s internal design reveals significant engineering effort, particularly around thermal management and waterproofing. The device uses dual copper vapor chambers that snake underneath the battery to passively dissipate heat. More notably, it includes an active cooling system with a turbo-style fan that rivals gaming phones in complexity.

The active cooling system is larger than the projector module itself and contains approximately 30 cents’ worth of copper, along with cooling fins designed to allow screwdrivers to pass through to reach internal screws. The entire fan enclosure is sealed with a red rubber gasket, allowing the fan to operate while maintaining the IP68 water resistance rating. This is an unusual engineering solution that suggests the Tank 3 Pro can likely survive submersion deeper than its IP68 rating indicates.

The battery configuration consists of two cells totaling approximately 23,000 mAh. One cell measured 11,377 mAh, leaving roughly 1,000 mAh unaccounted for in the advertised capacity, suggesting the second cell is slightly larger. The battery connects to the motherboard through multiple ribbon connectors, and the entire assembly sits within a large metal mid-frame.

The waterproofing approach uses a substantial red rubber gasket surrounding the back panel, similar in intensity to waterproofing found in underwater diving drones rated for 30-meter submersion. This suggests the Tank 3 Pro’s actual water resistance may exceed its IP68 specification.

Battery and Power Features

The 23,000 mAh battery is approximately six times larger than a typical iPhone battery, providing extended runtime for extended off-grid use. The device supports 120W fast charging via USB-C. Additionally, the Tank 3 Pro includes a 1200 lumen LED flashlight with a dedicated side button and strobe mode, separate from the camera flash. A camping light mode is accessible via one of the custom buttons on the side.

Things to Consider Before Buying

The Tank 3 Pro’s size and weight make it impractical for everyday carry in standard pockets. The lack of optical image stabilization across all four cameras is a significant limitation for a device at this price point. The projector’s resolution is not officially specified, leaving some uncertainty about its actual output quality. The LCD display, while functional, is not OLED, which some users may find disappointing given the overall price and feature set.

The device’s extreme durability and feature density come at the cost of everyday usability. This is not a phone designed to replace a standard flagship; it is a specialized tool for specific use cases.

Who This Phone Is For

The Tank 3 Pro is designed for digital nomads, outdoor enthusiasts, travelers working in remote locations, and anyone who prioritizes durability and self-sufficiency over portability. The built-in projector makes it particularly valuable for professionals who need to present information in off-grid environments. The night vision capability and extreme battery capacity appeal to outdoor adventurers and survival-focused users. The IR blaster and headphone jack add utility for controlling legacy devices and connecting wired audio equipment.

Buying Advice

At $700, the Tank 3 Pro occupies a unique market position. It is not a mainstream flagship replacement but rather a specialized device for users with specific needs. The projector alone justifies consideration for travelers and remote workers. The 23,000 mAh battery and rugged construction appeal to outdoor users. The night vision system and IR blaster add practical utility beyond what standard phones offer.

The decision to purchase should hinge on whether the specific features address real needs in your workflow or lifestyle. If you spend time off-grid, travel frequently to remote locations, or need a genuinely durable device that can function as a portable projector, the Tank 3 Pro delivers genuine value. If you prioritize everyday portability, camera quality with stabilization, or a sleek design, this device is not the right choice.

Conclusion

The UniHertz Tank 3 Pro is a phone that embraces a fundamentally different philosophy than mainstream flagships. It prioritizes function, durability, and self-sufficiency over thinness, lightness, and aesthetic minimalism. The built-in projector is a genuinely novel feature that no major manufacturer currently offers. The engineering inside, particularly the waterproofed active cooling system and dual vapor chambers, demonstrates thoughtful design for a device intended to survive harsh conditions.

This is a phone for users who have specific needs that standard devices do not address. For those users, the Tank 3 Pro delivers capabilities that justify its $700 price and considerable bulk.