Razer Deathadder V4 Pro tested: almost perfect gaming mouse
22.9.2025
Translation: machine translated
Pictures: Kevin Hofer
Razer is following up with the fourth version of the Deathadder: The wireless gaming mouse is even lighter and more precise than its predecessor and retains the same good features.
In my opinion, the Razer Deathadder V3 Pro is one of the best gaming mice on the market. With the Deathadder V4 Pro, Razer has raised the bar even higher. Hardly changed on the outside, the successor hides its strengths on the inside: It is lighter, offers improved battery life and delivers even more precision thanks to a new sensor.
Design and workmanship: proven features refined
The Deathadder V4 Pro retains the proven ergonomic shape for right-handers. I really enjoy gaming with the mouse because it fits comfortably in my hand. At just 56.1 grammes, the V4 Pro weighs even less than the already feather-light V3 Pro. The shape was specially designed for the palm grip and is best suited to larger hands, but also works well in the claw grip. Due to its size, it is less suitable for a pure fingertip grip.
The new mouse comes in black and white. Compared to its predecessor, the smoother, matt surface on which the engraved Razer logo is barely visible is striking. There is an RGB LED on the front that indicates the connection status.
The overall quality is excellent. All parts are cleanly finished, nothing rattles or wobbles. Particularly pleasing: With the V3 Pro, I could unintentionally press the side buttons by pressing the side panel - this problem has been fixed with the V4 Pro. Despite its low weight, the mouse seems more stable than its predecessor. The only small point of criticism: when you press very hard, you can hear quiet creaking noises, which shouldn't be the case with a premium mouse.
The matt plastic coating offers a good grip even with sweaty hands, but could be more susceptible to wear and tear due to the smoother texture.
Buttons, switches and scroll wheel: precise and comfortable
As with the V3 Pro, all buttons can be individually programmed, with the exception of the power/DPI switch on the underside. The software - more on this below - also allows you to set up a hypershift button for a second level of button assignments.
The click latency is low and consistent, which guarantees responsive gaming. The left and right mouse buttons produce a somewhat hollow, resonant sound that is significantly louder than the V3 Pro. However, the click on the optical switches feels good and provides pleasant feedback. The side buttons, scroll wheel and centre mouse button, on the other hand, work quietly.
The scroll wheel itself feels soft and has slightly defined steps - similar to its predecessor. The most important difference: Razer now uses an optical scroll wheel encoder instead of a mechanical one, which should improve longevity.
Compared to its predecessor, the distance between the side keys has increased. I like this because it makes them easier to distinguish.
Connection and battery life: more juice
The V4 Pro has a 306 mAh battery and impresses with runtimes of up to 150 hours at 1000 hertz or up to 22 hours at 8000 hertz. This is a significant increase over the V3 Pro, especially in 1000 Hertz mode. The mouse supports both wireless and wired connections.
The supplied cable is flexible and lightweight. However, Bluetooth is still missing, which limits productivity use when I want to switch between multiple devices.
Sliding feet: smooth on the move
The gliding feet of the Deathadder V4 Pro glide exceptionally smoothly over any surface. They have rounded edges to prevent snagging and offer a significantly larger surface area than the V3 Pro. This is particularly beneficial on softer fabric pads or when I press harder.
Sensor: as precise as its predecessor
The updated sensor of the Deathadder V4 Pro is impeccable. It offers 45,000 DPI, 900 IPS and 85 G. To explain: DPI stands for dots per inch. It indicates how many pixels the cursor jumps when the mouse is moved by one inch. As a rule, no one needs 45,000 DPI, but Razer offers it nicely. Razer is also up there with the competition when it comes to the other two values. IPS tells you how fast you can move the mouse so that the sensor still recognises the movements accurately. The acceleration in G, i.e. how quickly the sensor can detect start and stop movements, is in the same category.
In my tests with MouseTester v1.5, the sensor performs excellently. The sensor latency is exceptionally low. In terms of DPI precision - i.e. how much the set DPI deviates from the actual measured DPI - I measured an average deviation of around 0.5 per cent. I rate anything under five per cent as good.
The polling rate is extremely consistent and the sensor delivers great values for tracking speed and acceleration.
The available sampling rates range from 125 Hz to 8000 Hz, both wired and wireless. Particularly exciting are the new functions such as dynamic sensitivity and rotation tool, which offer additional customisation options.
Software: Offers everything you need, but is overloaded
In addition to the classic setting options for DPI levels, polling rate and button assignment, the software «Synapse» for the V4 Pro offers some exciting new functions.
The dynamic sensitivity is particularly interesting for competitive players: it dynamically adjusts the sensitivity of the mouse to the speed of movement. Slow, precise target movements are performed with a lower sensitivity, while fast swivelling is performed with a higher sensitivity. After a short familiarisation period, this function actually improved my aiming accuracy.
Another new feature is the rotation tool, which allows the orientation of the sensor to be adapted to personal grip styles. For those who hold their mouse at a slight angle, this function can ensure more precise movements by adjusting the X and Y axes accordingly.
Despite these great features, Synapse remains resource-hungry. The programme runs constantly in the background. Occasionally, the software reacts sluggishly or takes several seconds to load the settings. The user interface sometimes seems overloaded - simple changes sometimes require several clicks through various menus.
Particularly annoying: without the software, I lose access to advanced functions and saved profiles. Although the mouse saves basic settings in the internal memory, I am tied to Synapse for full functionality.
Compared to the V3 Pro: evolution instead of revolution
The Deathadder V4 Pro builds on the strengths of the V3 Pro and improves it in almost all areas. It is lighter, offers a longer battery life and an improved sensor. The included 8K-Hertz-capable dongle - which had to be purchased separately for the V3 Pro - and the greater distance between the side buttons are further welcome improvements.
The additional features such as the dynamic sensitivity and rotation tool round off the package and make the V4 Pro a further development of its predecessor.
In a nutshell
Ingenious gaming mouse further optimised
The Razer Deathadder V4 Pro is one of the best gaming mice currently on the market. It combines low weight, excellent ergonomics, first-class sensor performance and an impressive battery life in a well thought-out overall package.
For gamers, especially those with large hands who prefer the palm or claw grip, the Deathadder V4 Pro is the perfect choice. Its low latency and 8000 Hz sampling rate make it a reliable partner for competitive gaming in all genres.
If you already own a Deathadder V3 Pro, you don't necessarily need to upgrade - the improvements are evolutionary rather than revolutionary. The few weaknesses - the loud main buttons and the lack of Bluetooth - are hardly noticeable in view of the strengths.
Pro
- Excellent ergonomics
- First-class sensor performance
- weighs only 56.1 grammes
- Long battery life
Contra
- Loud main keys
- No Bluetooth
Kevin Hofer
Senior Editor
kevin.hofer@digitecgalaxus.chFrom big data to big brother, Cyborgs to Sci-Fi. All aspects of technology and society fascinate me.
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