Generic drivers drain your BeWell’s lithium battery by keeping the sensor active constantly. The exclusive driver implements Deep Sleep 2.0:

When you first plug a BeWell mouse into your PC, Windows or macOS will automatically assign a generic driver. This driver handles basic movements—left click, right click, scroll wheel, and cursor tracking. However, the generic driver cannot recognize proprietary chipsets used in BeWell's exclusive line.

For example, the BeWell Ergo 5000 features:

Without the BeWell Mouse Driver Exclusive, your $60 ergonomic mouse behaves like a $5 generic office mouse. You are essentially paying for hardware features that the OS cannot activate.

If you can provide any of the following, I can help you create a safe, accurate setup guide:

In the meantime, here is a generic safe driver installation guide for an unknown USB mouse: