Attwood PowerGuard U1 Battery Box - Series 16 Compatible

Black battery box with a yellow and black strap that secures the lid

Table comparing different battery box sizes and series

PowerGuard U1 Battery Box – Compact, Acid-Resistant Protection for Small Engines & Jet Skis

The PowerGuard U1 Battery Box is designed specifically for smaller batteries such as Series 16, jet ski batteries, and power lawn and garden equipment. Constructed from tough polypropylene, this vented black box provides complete acid resistance and long-lasting durability. It securely fits batteries with a maximum block height of 5-7/8 inches and a total height of 7-7/8 inches including terminals. With hold-down straps rated to 350 lbs—nearly four times the USCG requirement—this battery box exceeds safety standards and ensures stability under harsh conditions. Rigorously drop tested from -20°F to +120°F and equipped with mounting hardware, the PowerGuard U1 delivers reliable battery protection for recreational and utility applications.

Compact Design – Perfect fit for Series 16 batteries and smaller applications.
Versatile Use – Ideal for jet skis, lawn mowers, and garden equipment.
Polypropylene Construction – Provides complete acid resistance and durability.
Vented Housing – Allows safe gas release while protecting terminals.
USCG Certified Hold-Down Straps – Withstand 350 lbs. of force, nearly 4× the requirement.
Temperature Tested – Drop tested between -20°F and +120°F for extreme durability.
Secure Fit – Supports batteries up to 5-7/8" block height and 7-7/8" total height with terminals.
Mounting Hardware Included – Easy installation for stable, long-term battery protection.