Pacific Yacht Systems · video

What this video covers

Flooded lead-acid batteries require a liquid-tight battery box to contain electrolyte leaks caused by overcharging, aging, or casing cracks. Installers must secure these boxes from the outside to maintain the integrity of the container; drilling holes through the bottom or sides of the box to fasten it defeats its purpose by creating potential leak points. For sealed valve-regulated lead-acid (VRLA) batteries, such as AGM or gel types, a battery box is not required for leak containment because the electrolyte is immobilized. However, using a box with a lid remains recommended to protect battery terminals from accidental shorts caused by metallic objects like tools or gear. If space constraints prevent the use of a battery box for AGM or gel batteries, protective rubber boots must be installed over both positive and negative terminals to prevent short circuits.

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