Honda CRF125F 2023 Owner's Manual page 121

Battery
The battery is located in the battery
compartment under the seat.
Removal
1. Make sure the ignition switch is OFF.
2. Remove the seat (pages 56).
3. Disconnect the negative (−) terminal (1)
from the battery.
4. Disconnect the positive (+) terminal (2)
from the battery.
5. Release the battery holder band (3) from
the hook, then remove the battery (4)
taking care not to drop the terminal nuts.
112
Servicing Your Honda
UNDER SEAT
(1)
(3)
(1) negative (–) terminal lead
(2) positive (+) terminal lead
(3) battery holder band
(4) battery
(2)
(4)