The 11 Best 12 Volt Auxiliary Battery Boxes (2022 reviews)

Camco has been making great boxes for years, thanks to a combination of clever design and high-end materials. The Camco 12 Volt Auxiliary Battery Box is kind of weak, is extremely sturdy and it is inexpensive. Make sure this fits by entering your model number. Moreover, the box is compatible with manufacturer part number, is designed for excellent fit and it works great.

The box fits group size 24 batteries with inside dimensions of the lid 7-1/4 inches wide x 10-3/4 inches long x 8 inches tall with 2 inches of additonal headroom for battery terminals. Most importantly, the camco 12 volt auxiliary battery box price is good and it is very sturdy.

Most customers find that the box does not seal the way you want to use it. Also, they also found that the box fits in with a battery blanket installed with room for the side post connectors. Also, a few also found that the lid meets the box for wires there plenty big enough for ventilation. To sum up, many buyers have used the box for more than a few months without any complaints, and it shows no sign of giving up.

Customers also found that its wise to buy a 12 volt battery cutoff switch and battery ground connector, along with this box.

Top Customer Quotes:

Meets USCG cfr 183.420 and abyc e-010.7 specifications.
This fits perfectly in the trailer battery tray, and is priced right.
This fits standard configuration (standard length) 7ah-22ah sla batteries in the width of the box.
The only strap that comes with the box is to hold the top on.

RELATED: Best 12 Volt Battery Clips

Best For Direct Replacement: Seachoice 12 Volt Auxiliary Battery Box

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The Seachoice 12 Volt Auxiliary Battery Box's superior materials makes sure that it ages well with use. The seachoice 12 volt auxiliary battery box is perfect for high quality and it works as described. Secures a single group of 29 or 31 batteries. Also, it is very sturdy and it is stable.

The box holds the battery and it is good for direct replacement. Also, the box is great for a great price, works great and it is perfect for great quality. Above all, the seachoice 12 volt auxiliary battery box includes a quick-disconnect buckle and it is ideal for applications that do not require batteries to be completely encased.

Almost all buyers found that the box is great for #29 marine battery. Further, they also found that the box included any SS screws despite what the package says. Moreover, a few say that this sturdy plastic battery tray with strap ( for group 29, 31 ), will fit up to a 7 x 13 " battery. Overall, many customers have used the seachoice 12 volt auxiliary battery box for more than a few months without any complaints, and it shows no sign of giving up.

Top Customer Quotes:

The battery tray secures a single group of 29 or 31 batteries.
13-3/16 in. L x 7-5/8 in. W x 1-1/2 in. H.
Mounts with #10 pan head screws.
They fit perfectly and it works perfectly.

Best For Easy Install: Allstar 12 Volt Auxiliary Battery Box

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We would, of course, be remiss if we didn't mention the Allstar 12 volt auxiliary battery box for daily use. The Allstar 12 Volt Auxiliary Battery Box is very sturdy, it does the job and has an updated design. Make sure this fits by entering your model number. In addition, the box is very nice, It makes for a great buy and has a nice design.

The box is very happy, it is very secure and has a perfect design. Moreover, it is constructed from lightweight steel material. Above all, the allstar 12 volt auxiliary battery box makes for nice quality, It fits perfectly and has a new design.

Most buyers opine that the box fits size 27 group batteries. Moreover, they strongly agree that the box looks like it will hold most batteries. And, they strongly agree that the box has an oily protective coating. Obviously, this box passed the test and had very satisfied buyers eager to share their experience.

Top Customer Quotes:

This is great as a replacement battery box on a classic jeep.
This is built for good construction and it is crafted with great seller.
This is mountable anywhere you have a footprint available.
Package dimensions :21.59 cm l x25.4 cm w x33.02 cm h.

Best With Yellow Top: Gsi Machine Fabrication 12 Volt Auxiliary Battery Box

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Next on the list, we've got yet another box that manages to win our hearts. It's the Gsi Machine Fabrication 12 Volt Auxiliary Battery Box and it's widely considered as one of the most convenient boxes you can buy. The gsi machine fabrication 12 volt auxiliary battery box is yellow and it is designed for good fit. Make sure this fits by entering your model number. Further, this is fitment and it is made for excellent fit. Above all, the gsi machine fabrication 12 volt auxiliary battery box allows for a great fit and it is great with a yellow top.

Most customers quickly discovered that the box was perfect suitable for hot rod.s. Further, they also found that the box is made for an optima battery, but don’t believe a square one will fit unless it’s small. Moreover, a few say that this battery is a universal box that will be mounted anywhere there is space.

Few customers got optimum 25 redtop battery and battery connector bolt, along with the box.

Top Customer Quotes:

This is easy to work with and very well made.
Fits optima batteries: red 34/78, yellow 34/78, blue 34/78.
11 gauge a1008 mild steel, box cut & laser cut in-house.
This fits like a glove to add to that fits the battery perfectly.

Best For Travel Trailer: Powerhouse 12 Volt Auxiliary Battery Box

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Compared with other boxes in this category, the Powerhouse 12 Volt Auxiliary Battery Box has a convenient design. Also, the box includes box, lid, strap and mounting brackets with screws. Make sure this fits by entering your model number. Most importantly, the powerhouse 12 volt auxiliary battery box works great and it is best for high strength.

Most buyers agree that the box is easy to carry and secure for transport. In addition, they say that the box can slide around in the vehicle.

Customers say that buying a 12 volt battery cutoff switch, with this box made their life much easier.

Top Customer Quotes:

Group 24 high strength polypropylene battery box.
This comes with a strap to secure the box with a lid.
Delivers what they promise.

Best For Sturdy Metal: Speedway Motors 12 Volt Auxiliary Battery Box

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The speedway motor 12 voltauxiliary battery box's feels more premium than its price would suggest. The speedway motor 's 12 volt auxiliarybattery box is used for corrosion prevention, is good for sturdy metal and it is constructed with excellent quality. Speedway motors is comprised of people, just like you, who love cars. Further, it worked perfectly and it works perfectly.

Lastly, the speedway motor 12volt auxiliary battery box works great and it is perfect for great quality.

Almost all buyers opine that the box is designed for smaller batteries that fit into the plastic box. Further, they strongly agree that the included j hooks are not long enough to hold a group 24 marine deep cycle.

Why We Like This:

The Manufacturer says: With speedway motors, we know how fast you chase your dreams.
This will hold a battery up to 10-5/8" x 7-1/16" up to 7-1/2" high.
This is made with carriage bolts and it works like a champ.
Zinc-plated for rust and corrosion prevention.

Best With Strap: Attwood 12 Volt Auxiliary Battery Box

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The features department is where the Attwood 12 volt auxiliary batterybox truly manages to shine. The Attwood 12 Volt Auxiliary Battery Box includes 4 #8, 3/4-inch screws and 2 footman clamps. The Manufacturer says: We deliver safe and reliable lighting, fuel systems, water systems, seating & pedestals, swimming ladders, custom upholstery, and general marine accessories that are easy to install and meet regulatory compliance. Moreover, it is made of sturdy woven polypropylene and it has firm-grip buckles.

The box is completely resistant to battery acid, so it will deliver dependable long-term service. And, the box feels cheap, holds the battery and it is easy to use. Above all, the attwood 12 volt auxiliary battery box has been an award-winning leader in engineering, testing, and manufacturing the highest quality marine products for over 100 years.

One customer says - "Good addition kit to go with the battery box. ". Almost all customers opine that the box is great with an aftermarket mgb battery box.

Why We Like This:

This is great for a great price and it is constructed with a great appearance.
The long strap is 54 inches long and fits on battery box 9084.
It is made of sturdy woven polypropylene and has firm-grip buckles.

Best For Car: Blackhorseracing 12 Volt Auxiliary Battery Box

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Blackhorseracing offers a variety of boxes for personal choice and yet maintains quality in all the variants. The Blackhorseracing 12 Volt Auxiliary Battery Box is convenient to use, it comes with complete accessories and has a nice design. The breather fitting, breather tube, grommets and battery are held down with wing nuts for an easy install. This fully sealed box will handle every application from street to race vehicle and custom truck or suv applications.

Lastly, the blackhorseracing 12 volt auxiliary battery box is fitment and has a new design.

In addition, they say that the fasteners are countersunk 4 for the tray with nuts and washers and 6 for the hold downs with threads in the tray. Overall, for most customers, the box was most suitable.

Customers also discovered that its wise to buy a 12 volt battery isolation switch, along with this box.

Why We Like This:

▲ complete accessories complete with battery connections, performance wire positive and negative battery cable.
This is made with nice pieces and it is designed for easy installation.
One of the newcomers and featured product.

Best For Heavy Duty: Renogy 12 Volt Auxiliary Battery Box

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If you often find yourself scrambling for an appropriate and satisfactory box, Renogy 12 Volt Auxiliary Battery Box is your solution. The renogy 12 voltauxiliary battery box is made of high impact-resistant polypropylene to withstand harsh environments and mitigate potential damage. Make sure this fits by entering your model number. The battery box in a car, boat, camper, motorhome, trailer, or caravan with the included tie - down strap and mounting brackets.

Lastly, the renogy 12volt auxiliarybattery box is adjustable and it is perfect for any power source type.

Almost all customers quickly discovered that the box fits well with room to spare. Moreover, a few say that the box works well so far, because it fits inside perfectly. Also, they also found that the interior dimensions shown ( as a blue box ) are accurate.

Why We Like This:

Delivers what they promise.
Lot of satisfied buyers.

Best For Extra Power: Ruffstuff Specialties 12 Volt Auxiliary Battery Box

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The ruffstuff specialty 12 volt auxiliary batterybox has killer features for the price point. And, it fits the 34 or 78 series only. Make sure this fits by entering your model number. Most importantly, the ruffstuff specialty 12 volt auxiliary battery box is yellow, is highly recommended and it is perfect for great quality.

Most customers opine that the box will fit series 34/78 optima batteries. Further, a few strongly agree that the box can be mounted in any direction, although it may require support from the bottom for the weight of both batteries. And, a few also found that the box was good for extra power but the other end wasn’t. In conclusion, most customers found the box suited best, and no one questions it.

Top Customer Quotes:

This battery box is universal, with no specific application.
This fits the red tops to add to that will only fit 34/78 red tops.
Dimensions 15" long x 10 1/8" wide.

Best For Boat: Opl5 12 Volt Auxiliary Battery Box

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The Opl5 12 Volt Auxiliary Battery Box is capable of outshining several other boxes featured in this list in overall features in its price range. The opl5 12 volt auxiliary battery box is made of an impact-resistant abs housing, which enables this box to withstand shock, unaffected by acid, gas, oil, as well as UV impsct. The digital volmeter checks the status of your battery instantly with one click. Moreover, it comes with a battery quick connector and 30a fuse x 2, 12v power socket, digital volmeter display, dual usb socket, circuit breaker switch, multifunctional.

The box comes with a 10a circuit breaker to the battery ports without opening the box, widely used for rv suv atv camper truck motorcycle for convenient connection of various dc accessories. In addition, it comes with a strap (43inch)and safety buckle to hold the strap in place. Most importantly, the opl5 12 volt auxiliary battery box comes with product dimensions and it would be perfect with durable construction.

"For smart battery box, there are two 2.4a USB ports. " - says, one customer. In short, many customers have used the opl5 12 volt auxiliary battery box for more than a few months without any issues, and it shows no sign of giving up.

Customers say that getting a quick connect disconnect plug battery cable, along with box is useful.

Why We Like This:

Two usb ports are very convenient for charging your phone, tablet.
The Manufacturer says: please buy with confidence. We offer a two - year item warranty.
New and hot releases.