Razer Basilisk V4 Pro Boosts Battery to 200 Hours and Adds AI Key

Razer updated its Basilisk gaming mouse line on October 23, 2026, releasing the Basilisk V4 Pro after a two-year gap since the previous model. The new device aims to balance functionality and portability for gamers who want more controls than a minimal shooter mouse provides without the bulk of a macro-heavy design.

The V4 Pro features the Focus Pro 50K optical sensor, which supports up to 50,000 DPI and 930 IPS. It includes fourth-generation optical switches rated for over 100 million clicks and offers polling rates up to 8,000 Hz. Connectivity is available via 2.4GHz wireless, Bluetooth, or USB-C. The mouse is priced at $169.99 in black and white variants.

Sarah Jacobsson Purewal, a senior editor at Tom's Hardware, reviewed the device and highlighted the battery life increase as a primary benefit. Battery duration extends from 150 hours on the previous V3 Pro 35K to 200 hours at a standard 1,000 Hz polling rate. At the maximum 8,000 Hz rate, the battery lasts 54 hours. The weight also drops to 100 grams, reducing the mass by 12 grams compared to the 112-gram predecessor.

The physical design introduces a total of 12 programmable buttons, up from the previous count. Two new buttons were added: one beside the left mouse button for profile switching and a third thumb button for Razer's AI prompt feature. The reviewer noted that the placement of the profile button at the front edge of the 5.02-inch device makes it difficult to reach for users with medium-sized hands.

The addition of the AI button caused the most ergonomic issues. Because it matches the size of the existing thumb buttons, it pushed the cluster backward. This left the primary thumb button, designated MB4, too far from the natural resting position of the thumb. Purewal stated that all three thumb buttons felt slightly off, despite the ability to remap their functions. The review questioned the necessity of a dedicated AI key on every peripheral.

The device includes a tilt wheel with two tactile modes and a free-spin option. The free-spin mode was found to be overly sensitive and prone to backscrolling, while the precision tactile mode received positive feedback. The mouse ships with a USB-A dongle, an adapter, and a 6-foot braided cable. It is sold alongside the Mouse Dock V2 Pro, a separate accessory priced at $69.99 that provides wireless charging and an integrated 8,000 Hz receiver.

Tom's Hardware positioned the Basilisk V4 Pro between the DeathAdder V4 Pro and the Naga V3 Pro in terms of button count and design philosophy. The final verdict praised the lower weight, improved battery life, and general feel, while citing the awkward thumb button layout and the $169.99 price point as main drawbacks.