Visual survey
Check for existence of obvious damages (for example, the broken or cracked case or a cover) which can cause electrolyte leak. If obvious damages are found, replace the battery. Establish the reason of damage and eliminate it if necessary.
QX4.ONLINE S40.ONLINE A-8.ONLINE W124.ONLINE RX300.ONLINE W140.ONLINE B3-B4.SPACE B3B4.SPACE A-8.SPACE