Attwood battery enclosures can look alike even when their inside dimensions differ. Check the moulded part number, battery group, lid ventilation and restraint hardware before selecting a replacement. The larger Group 29/31 box and the open 29/31 tray are also different products and should not be confused.
Recognize the enclosure and restraint
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.
Match the printed MPN and interior size
Dimensions are manufacturer-published inches, with the covered boxes measured with their lids fitted.
| 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.
Vented versus non-vented lid
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.
The listed vented boxes are not interchangeable merely because they have similar black moulded cases. Confirm the battery chemistry and approved enclosure design for the installation.
Check the battery, cover and hold-down
Measure the battery's length, width and total height, including terminal projections and any handles. Then inspect the original box lid and the space around it. A battery that fits the bottom tray may still contact the closed lid or leave no room for cables. Compare the strap and original fixing points before replacing them.
Attwood lists a 40-inch strap for the small, standard and Power Guard 27 cases, while the large 9084 uses a 38-inch strap in the published specification. The 9094-5 tray has a crossbar, not a webbing strap.
Match Attwood part numbers to current listings
Open each exact MPN to inspect its listed condition, images and availability.
Attwood 9082-1
Small black box; compare the moulded case and lid against the 8¼-inch internal length.
Check listed condition and availability
Attwood 9065-1
Group 24 vented box; original lid has four cable openings and a 40-inch restraint strap.
Check listed condition and availability
Attwood 9067-1
Identify the Power Guard 27 by the wider body and published 13⅞-inch inner length.
Check listed condition and availability
Attwood 9084-1
Large Group 29/31 case; although longer, the lid-height allowance is lower than the Group 27 box.
Check listed condition and availability
Attwood 9094-5
Open 29/31 tray; identify by the crossbar and retaining rods, not a vented box lid.
Check listed condition and availabilityRelated battery enclosure identification
Identify Moeller boxes, rod trays and strap trays · Identify battery switches and terminal boots
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