Shimano GRX RX 815 Series Dealer's Manual page 79

INSTALLATION/REMOVAL
Installing the battery
4.
Secure the rear of the battery mount.
For the long type, secure the rear of the battery mount.
When using a zip tie
When there is a mounting boss on the frame
If there is a mounting boss on the frame, the rear of the battery mount can be secured to
the frame with a mounting bolt too.
NOTICE
• When installing parts on a carbon frame/handlebars, confirm the recommended
tightening torque with the carbon frame or part manufacturer in order to
prevent damage to the carbon material due to overtightening or inadequate
securing of the components due to insufficient tightening torque.
Zip tie
Mounting bolt
Mounting boss
79
1.2 - 1.5 N·m