Attwood 90671 Power Guard Vented Battery Box – Group 27M, Black
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Attwood 90671 Power Guard Vented Battery Box – Group 27M, Black
Secure your Group 27M marine battery with the Attwood 90671 Power Guard Battery Box. Built from acid-resistant polypropylene and compliant with ABYC standard E-10 and USCG Specification 183.420, this vented box is designed for flooded lead-acid batteries that require airflow to safely vent hydrogen gas during charging. Four enlarged cable openings (0.55" diameter) provide clean routing for battery cables without tight bends, and large handles with rolled edges make the box easy to carry and position during installation.
Key Features
- Fits Group 27M batteries
- Vented design — allows hydrogen gas to escape safely during charging of flooded lead-acid batteries
- Four enlarged cable openings — 0.55" diameter for clean, unrestricted cable routing
- Large handles with rolled edges — comfortable grip for carrying and positioning
- ABYC E-10 and USCG 183.420 compliant — meets OEM-installed battery hold-down standards
- Acid-resistant polypropylene construction — fully resistant to battery acid exposure
- Mounting hardware included
- Black finish
Parts Desk Insights
The 90671 vented box is the correct choice for flooded lead-acid (wet cell) batteries in Group 27M size — these batteries off-gas hydrogen during charging, and a vented enclosure is required for safe installation. The four enlarged cable openings are a practical feature that makes wiring cleaner and easier, particularly on boats where battery cables are thick or where the box is installed in a tight compartment. If you’re installing a sealed AGM or gel battery in Group 27M size, a non-vented box may be more appropriate — check the Attwood Power Guard Battery Box Group 27 for alternatives. For Group 24/24M batteries, see the Attwood 90651 Vented Battery Box for Group 24/24M or the Attwood 90691 Non-Vented Battery Box for Group 24/24M. For Group 29/31 batteries, see the Attwood 90841 Large Vented Battery Box for Group 29/31.
Specifications
- Model: 90671
- Battery Group: 27M
- Vented: Yes
- Cable Openings: 4 × 0.55" diameter
- Material: Acid-resistant polypropylene
- Standards: ABYC E-10, USCG 183.420
- Colour: Black
- Hardware: Mounting hardware included
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.