Razer cuts Basilisk mouse weight to 100 grams and boosts battery to 200 hours

Razer released the Basilisk V4 Pro today, reducing the device weight to 3.53 ounces and extending wireless battery life to 200 hours. The mouse is priced at $169.99 in black and white. It launched with a separate Mouse Dock V2 Pro charging station that costs $69.99.

The company added two programmable buttons to the design, bringing the total count to 12. A new key sits beside the left mouse button to switch profiles. A third thumb button was placed in front of the existing pair. This button opens Razer's AI prompt by default. Senior editor Sarah Jacobsson Purewal of Tom's Hardware found these additions awkward for users with medium-sized hands and long fingers. The profile button is located on the front edge of the 5.02-inch device. The AI button pushes the other thumb controls backward, making the primary thumb button difficult to reach.

The V4 Pro uses a Focus Pro 50K optical sensor that reaches 50,000 DPI and 930 IPS. It connects via 2.4GHz wireless, Bluetooth, or USB-C. Polling rates reach 8,000 Hz. The device weighs 1.42 ounces less than the Basilisk V3 Pro 35K, which shipped in October 2024. The reviewer noted the mouse is easier to pick up but still not ultralight. The tilt wheel includes two tactile modes and a free-spin option. The free-spin mode proved too sensitive during testing.

Battery performance improved from 150 hours on the previous model to 200 hours at a 1,000 Hz polling rate over 2.4GHz. At the maximum 8,000 Hz polling rate, the battery lasts 54 hours. The fourth-generation optical switches are rated for more than 100 million clicks. The reviewer reported no misclicks or double-clicks during testing. The mouse tracks on most surfaces, including glass at least 4mm thick. The shape suits MMOs and competitive shooters, though the reviewer suggested it may not fit top-level competition.

The package includes a USB-A dongle, an adapter, and a 6-foot braided cable. It does not include Razer's HyperFlex cable or grip tape. The Mouse Dock V2 Pro features an integrated 8,000 Hz receiver and eight RGB zones. It also works with several older Razer models. Razer positions the new mouse between the DeathAdder V4 Pro and the Naga V3 Pro. The review cites the feel, lower weight, and battery life as strengths. It lists the AI button layout, price, and large size as drawbacks.