17. BATTERY/CHARGING SYSTEM DOWNTOWN 125i BATTERY REMOVAL/INSTALLATION The battery is in the battery box behind seat. 1. Remove the seat. 2. Remove the met-in box 3. Remove four screws and then remove the battery retainer (4) (3) 4. Pull battery out to expose the terminal leads 5. Disconnect the negative (-) terminal lead (3) from the battery first, then disconnect the positive (+) terminal lead (4). 6. Remove the battery from the battery box. Battery installation: Install in the reverse order of the removal. When install the battery, first connect the positive (+) cable and then negative (-) cable to avoid short circuit. 17-4