Proper covering and insulation of the battery terminals prevents sparks or short circuits, even under the harshest conditions. Mastervolt insulation caps fully protect the battery terminals, ensuring your convenience and safety. Battery terminals are a problem in many applications because dangerous fumes from battery acid cause corrosion on the lead surface and copper wiring leading to the battery terminals. The same occurs under natural influences, such as rain. This acid corrosion must be removed regularly. However, prevention is better than cure. For this reason, Mastervolt recommends the use of insulation caps.