Mindray Resona R9 Exp - Page 216

9-54 Structure and Assembly/Disassembly
3. Unscrew 5 M3 X 8 cross panhead screws from PC box assembly with the screwdriver (M3, M4)
to remove PC main board assembly.
9.3.25.1 Button Battery
1. See Chapter 9.3.24.6 and 9.3.25 for details.
2. Take the button battery out (Lithium 3V 620mAh CR2450).
Button battery Lithium 3V 620mAh CR2450