The battery charging process generates highly explosive oxyhydrogen. In case of acing at corroded battery contacts, this may already be sufficient to cause an explosion. It is actually so easy to protect electric contacts against corrosion, though. Another issue regarding lack of industrial safety are electric shocks. Experienced technicians keep harming themselves due to touching live contacts during maintenance or installation work. Lugsulation does not only offer protection against corrosion, but also against accidental contact.