Honda GOLDWING GL1800/A 2015 Owner's Manual page 214

The battery is located in the battery box behind the left side cover.
After turning the ignition switch OFF, wait more than 10 seconds and then
remove the negative cable of the battery. The Navigation system may not
function correctly.
Removal
1. Make sure the ignition switch is OFF.
2. Remove the left side cover
3. Pull the clip and remove the battery plate.
4. Disconnect the negative (–) terminal lead from the battery first.
5. Remove the bolt and open the battery holder.
6. Disconnect the positive ( ) terminal lead.
7. Pull the battery out of the battery box.
Be careful to avoid damaging the cover under the battery box when you
remove the battery.
8. Charge the battery (see following section), unless you have been riding
regularly.
9. Store your battery in an easy-to-reach location off the floor, in an area
protected from freezing temperatures and direct sunlight.
10.Clean the battery box after removing the battery for storage. Dry the battery
box and, if paint is missing, re-paint the area.
11.Slow charge the battery (see following section) once every 30 days.
LEFT SIDE
negative (–) terminal lead
battery
battery box
Installation
1. Reinstall in the reverse order of removal. Be sure to connect the positive (+)
terminal first, then the negative (–) terminal.
2. Check all bolts and other fasteners are secure.
(page 167).
cover battery holder
Battery
positive (+) terminal lead
battery plate
bolt
Servicing Your Honda
clip
211