it is inserted "flush" into the bottom, no hidden cavities need to be opened (or the battery compartment) picking up with a fingernail) by the way, model (wife) and 4000 (mine) is certainly more grippy and the click is quieter, model, I ordered this one for myself and never regretted it.
Wireless compact mouse Xiaomi Mi Dual Mode Wireless Mouse Silent Edition, white
174 Review
π±οΈ Logitech MX Master Wireless Mouse: High-Precision Sensor, Easy-Switch up to 3 devices, Meteorite Black
322 Review
A4Tech XL-747H Gaming Mouse, Blue Spider
190 Review
Renewed Logitech K800 Wireless π‘ Illuminated Keyboard: Brighter, Better, and More Convenient
204 Review