When cleaning the batteries, use soft cloth only. Use sodium bicarbonate to neutralise the surface. Do not clean the batteries using clothes that contain organic solvents or oil. Also, contact with soft polyvinyl chloride and the like must be avoided.
Do not short the battery.
Do not attempt to disassemble the batteries. Avoid contact with sulphuric acid leaked from the broken batteries. If eyes come in contact with sulphuric acid, wash it with plenty of clean water and consult a physician immediately.