Choosing an Attwood battery box starts with the battery's actual case measurements. Four vented marine-style boxes cover different battery groups, while Attwood also makes an open Group 29/31 holding tray. This reference compares manufacturer inside clearances, outside footprints and restraint styles so you can choose the correct MPN.
Closed box or open battery tray?
A covered enclosure with cable openings and a hold-down strap. Select the particular Group U1, 24, 27 or 29/31 size.
Attwood 9094-5 uses retaining bolts and an adjustable upper crossbar instead of an enclosing lid.
Attwood 9069-1 has a non-vented Group 24 lid. The manufacturer explicitly excludes this model from marine use.
Attwood battery box and tray size comparison
All dimensions are in inches, length × width × height. Covered-box inside and outside measurements are published with the lid installed; the open tray instead lists the usable battery base.
| Part number | Battery group | Product | Inside dimensions (in) | Outside dimensions (in) | Restraint |
|---|---|---|---|---|---|
| 9082-1 | U1 / small | Vented box | 8¼ × 5½ × 7⅞ | 11 × 7½ × 8¾ | 40 in |
| 9065-1 | 24 / 24M / 24F | Vented box | 11⅛ × 7¾ × 10⅛ | 14 × 9⅝ × 10⅝ | 40 in |
| 9067-1 | 27 / 27F / 27M | Vented box | 13⅞ × 7¼ × 10½ | 16⅞ × 9⅝ × 10⅞ | 40 in |
| 9084-1 | 29 / 31 | Vented box | 15⁷⁄₁₆ × 7⅛ × 9¾ | 18¾ × 9¼ × 10¼ | 38 in |
| 9094-5 | 29 / 31 | Open hold-down tray | 13¹⁄₁₆ × 6⅞ (base) | Not listed here | Adjustable crossbar |
| 9069-1 | 24 / 24M / 24F | Non-vented box — not for boats | 11⅛ × 7¾ × 10⅛ | 14 × 9⅝ × 10⅝ | 40 in |
The 9094-5 tray interior measurement is a base length and width only; it must not be read as a three-dimensional battery enclosure.
Which box can be used in a marine installation?
Attwood specifically excludes its non-vented 9069 cover from boats. For a marine Group 24 installation, consider the manufacturer-designated vented 9065-1 only after confirming the battery dimensions and vessel-specific ventilation requirements.
Battery type, chemistry, compartment construction and ventilation arrangements can impose additional requirements. Follow the battery and vessel manufacturers' instructions; a vented box does not replace required compartment ventilation.
Measure before replacing a box
Use the inside dimensions to check the battery case and terminal clearance. Use the outside dimensions to confirm the box will fit the compartment and leave access for the strap, lid and cables. Group labels alone do not establish fit: Attwood's Group 29/31 box has a longer interior than the Group 27 model but less published internal height.
The vented boxes include hold-down straps and mounting hardware. Attwood lists the 9094-5 as a heavy-duty tray with an adjustable-height crossbar and stainless-steel retaining bolts. Use the correct mounting method for the chosen product.
Attwood battery boxes and heavy-duty tray
Select a matching product to review its specifications and current warehouse availability.
Attwood 9082-1
Compact vented case for supported small battery types. Check the lid clearance and terminals in the actual compartment.
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Attwood 9065-1
Vented standard-size Group 24 enclosure supplied with strap and mounting hardware.
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Attwood 9067-1
Power Guard 27 box with additional interior length for the listed Group 27 battery family.
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Attwood 9084-1
Larger vented enclosure for a suitably sized Group 29 or 31 battery. Check the lower 9¾-inch inner height.
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Attwood 9094-5
Open heavy-duty tray with adjustable retaining crossbar and stainless-steel retaining bolts rather than a lid.
View product details and availabilityOther battery storage and protection guides
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