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NOCO Snap-Top HM318BKS Battery Box, Group 24-31 12V Outdoor Waterproof Battery Box for Marine, Automotive, RV, Boat, Camper and Travel Trailer Batteries

4.7 4.7 out of 5 stars 5,220 ratings

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Group 24-31
Brand NOCO
Unit Count 1.0 Count
Voltage 12 Volts
Model Name HM318BKS
Item dimensions L x W x H 14 x 7.1 x 9.6 inches

About this item

  • Fit Type: Universal Fit.Fit Type: Universal Fit

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NOCO Snap-Top HM318BKS Battery Box, Group 24-31 12V Outdoor Waterproof Battery Box for Marine, Automotive, RV, Boat, Camper and Travel Trailer Batteries
NOCO Snap-Top HM318BKS Battery Box, Group 24-31 12V Outdoor Waterproof Battery Box for Marine, Automotive, RV, Boat, Camper and Travel Trailer Batteries
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PriceCurrently unavailable.$89.99$89.99-6% $11.99
Typical:$12.80
-34% $189.99
List:$289.99
Delivery
Get it as soon as Sunday, May 19
Get it as soon as Sunday, May 19
Get it as soon as Monday, May 20
Customer Ratings
Value for money
4.7
4.2
3.4
4.5
3.5
Easy to install
4.8
4.8
4.6
4.2
Sturdiness
4.6
3.7
4.3
Light weight
4.5
4.5
4.7
Easy to use
4.5
4.6
4.8
Sold By
ALL-TOP
Li Time US
Amazon.com
Amazon.com
voltage
12 volts
12 volts
12 volts
12 volts
12 volts
reusability
Single Use
Rechargeable
Rechargeable

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What's in the box

  • Group 24-31 Snap-Top Battery Box
  • 42-Inch Battery Box Strap
  • Mounting Hardware
  • Product information

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    NOCO Snap-Top HM318BKS Battery Box, Group 24-31 12V Outdoor Waterproof Battery Box for Marine, Automotive, RV, Boat, Camper and Travel Trailer Batteries

    NOCO Snap-Top HM318BKS Battery Box, Group 24-31 12V Outdoor Waterproof Battery Box for Marine, Automotive, RV, Boat, Camper and Travel Trailer Batteries


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    Product Description

    The HM318BKS Group 24-31 Snap-Top Battery Box is a battery storage solution for Group 24-31 battery sizes, including 12V Marine, RV, Boat, and Trailer Batteries. It features locking tabs to fasten the cover securely to the battery case, reinforced plastic handles to prevent cracking during battery relocation, and allows adequate ventilation of battery acid vapors. This rugged battery box maintains its impact properties down to minus 20°F, as well as, resistant UV, oil, gas and other contaminants. Perfect installation in a car, boat, camper, motorhome, trailer, or caravan, as well as, generator equipment.

    Other commonly used search terms: battery box,marine battery box,battery boxes marine,rv battery box,boat battery box,waterproof battery box,trailer battery box,trolling motor battery box,battery box strap,12v battery box,battery boxes,battery storage box,small battery box,rv battery box strap,battery box marine,car battery box,smart battery box,noco battery box,12 volt battery box,camper battery box,battery box rv trailer,6 volt battery box,solar battery box,heavy duty battery box,battery box 12v,6v rv battery box,6 volt battery box for rv,box battery,6volt battery box,6v battery box,small battery box 12v,snap top battery box,big battery box,outdoor battery box,battery box trailer,battery box for rv,waterproof 12v battery box,trolling battery box,battery box vent,vented battery box,battery box for camper,rv battery box lock,battery box deep cycle,27 battery box,group 27 battery box,battery box 27,battery box group 27,24 battery box,group 24 battery box,battery box 24,battery box group 24,31 battery box,group 31 battery box,battery box 31,battery box group 31

    Customer reviews

    4.7 out of 5 stars
    4.7 out of 5
    5,220 global ratings

    Customers say

    Customers like the fit, ease of installation, performance, and value of the battery box. For example, they mention it fits group 49 perfectly, works well, and is good value for money. Some are satisfied with sunlight protection, and quality. That said, opinions are mixed on the strap and water resistance.

    AI-generated from the text of customer reviews

    255 customers mention223 positive32 negative

    Customers like the quality of the battery. They mention it's a nice sturdy box, with a hard plastic decorative design. The case is sturdy with ventilation, and is well made for a big battery. Some say that the strap degraded after 13 months.

    "nice and strong. big battery fits. great quality" Read more

    "...It's a nice sturdy box, but will need to be modified to make it weather proof for use outdoors." Read more

    "...Important to me is that this box has a moveable separator for multiple sized batteries...." Read more

    "...Been using for a couple years and still looks brand new. Great quality and value, durable and sturdy" Read more

    168 customers mention131 positive37 negative

    Customers like the fit of the battery. For example, they say it's sturdy and fits their big batteries well. Some mention that the box is large enough for 20ah batteries and probably bigger.

    "nice and strong. big battery fits. great quality" Read more

    "Battery fit perfect. Enough space on top to connect accessories on my battery. Customer service is fantastic...." Read more

    "Lite weight with adjustable width. I am pleased with looks. Not one for an abusive spot." Read more

    "...nice battery box for the price, I just couldn't use it as it wouldn't fit my battery...." Read more

    142 customers mention138 positive4 negative

    Customers are satisfied with the performance of the battery box. For example, they mention it works well, keeps the rain off of them, and is solidly constructed. Some appreciate the included battery strap and the side handles. Overall, most are happy with the product's performance and recommend it to others.

    "This was the least expensive battery box. Bigger than I needed, but it works well." Read more

    "...It's for use in an electric fence installation and works great keep all the devices together, however I found out the hard way that it is NOT..." Read more

    "...Works very well" Read more

    "Work out great for pontoon" Read more

    141 customers mention131 positive10 negative

    Customers appreciate the value of the battery. They say it's well made and worth the money.

    "Good low cost battery boxes. All came with straps and dividers. 2 came with both air vent covers but 1 box was missing 1 air vent cover...." Read more

    "This was the least expensive battery box. Bigger than I needed, but it works well." Read more

    "Its hard to beat the price point especially with the extras...." Read more

    "It was a very nice battery box for the price, I just couldn't use it as it wouldn't fit my battery...." Read more

    30 customers mention30 positive0 negative

    Customers are satisfied with the sunlight protection provided by the battery case. They mention that it protects their camper battery real well from moisture and rain, and is a great protector for batteries on the go. They also appreciate the weatherproof design and the ability to store the battery safely.

    "...Luckily the electronics weren't damaged. I have drilled drain holes in the bottom and sealed up the vent holes in the lid...." Read more

    "I used it anyway for two lawnmower size batteries. Work good. Keeps the rain off of them." Read more

    "Hard sturdy plastic decorative design, sturdy strong and weatherproof" Read more

    "It works. Can't be submerged, but keeps battery out of the elements." Read more

    24 customers mention21 positive3 negative

    Customers find the installation of the battery to be easy. They mention that the adjustable insert and the cover have vents making it easy to install wires from the battery tender. They also say the straps are easy to figure out and the lid clips on, making it convenient. Customers also say that the material is easy to work with and the battery is easy pick up with two hands and carry.

    "...This box smokes it. Way more manageable. The wires go in easier, the straps are simple and workable, and the case is study...." Read more

    "...The voltage meter was easy...1 1/8” hole saw. The switch required a rectangular cut out...which is when I learned how tough this material is...." Read more

    "This works great so far. Easy to install. Add 1 or 2 centimeter to the actual length of the battery when installing the divider...." Read more

    "...I decided to get a bigger box and it worked out great and easy to install." Read more

    65 customers mention44 positive21 negative

    Customers are mixed about the strap. Some mention that it comes with a hold-down strap that can be used to keep the box closed and secured. However, others say that the strap has a complex holding mechanism that is a pain to open.

    "Good low cost battery boxes. All came with straps and dividers. 2 came with both air vent covers but 1 box was missing 1 air vent cover...." Read more

    "...It also comes with two mounting clamps that you screw into the side of your boat/whatever that I'm assuming you pass the strap through to the the..." Read more

    "Case is fine but the strap degraded after 13 months and needs to be replaced." Read more

    "...It also comes with dividers for small batteries to lock it in tougher and not just "fit within a box"" Read more

    25 customers mention16 positive9 negative

    Customers are mixed about the water resistance of the battery. Some mention that it keeps the battery dry and safe, while others say that it can't keep any water out.

    "Used to store a deep cycle outside. Seals up well enough." Read more

    "...the devices together, however I found out the hard way that it is NOT waterproof...." Read more

    "...Lid can face either way for cable ports, keeps water out and the sun off your batteries." Read more

    "Fits my optima group 31 blue top perfect and keeps it dry. Your not going to find it cheaper elsewhere either...." Read more

    Good boxes
    5 Stars
    Good boxes
    Good low cost battery boxes. All came with straps and dividers. 2 came with both air vent covers but 1 box was missing 1 air vent cover. Not going to use the vent covers anyways. Noco is #1
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    Top reviews from the United States

    Reviewed in the United States on March 22, 2024
    Size: Group 24-31Verified Purchase
    Good low cost battery boxes. All came with straps and dividers. 2 came with both air vent covers but 1 box was missing 1 air vent cover. Not going to use the vent covers anyways. Noco is #1
    Customer image
    5.0 out of 5 stars Good boxes
    Reviewed in the United States on March 22, 2024
    Good low cost battery boxes. All came with straps and dividers. 2 came with both air vent covers but 1 box was missing 1 air vent cover. Not going to use the vent covers anyways. Noco is #1
    Images in this review
    Customer image Customer image
    Customer imageCustomer image
    Reviewed in the United States on March 18, 2024
    Size: Group 24-31Verified Purchase
    nice and strong. big battery fits. great quality
    Reviewed in the United States on April 10, 2024
    Size: Group 24-31Verified Purchase
    This was the least expensive battery box. Bigger than I needed, but it works well.
    Reviewed in the United States on March 31, 2024
    Size: Group 24-31Verified Purchase
    I used this box for a solar wiring cabinet and have a charge controller, temp controller and a med sized lithium battery inside. It's for use in an electric fence installation and works great keep all the devices together, however I found out the hard way that it is NOT waterproof. There are 2 open vent ports on the top of the lid which funnel the water from the top down into the box. I filled up about a half inch of water in the box the first time it rained. Luckily the electronics weren't damaged. I have drilled drain holes in the bottom and sealed up the vent holes in the lid. It's a nice sturdy box, but will need to be modified to make it weather proof for use outdoors.
    One person found this helpful
    Report
    Reviewed in the United States on January 18, 2024
    Size: Group 24-31Verified Purchase
    I use this to protect my expensive LiFePo4 (Lithium-Iron-Phosphate) battery that I move around a lot for my Amateur Radio operations.

    Important to me is that this box has a moveable separator for multiple sized batteries. Since my LiFePo4 battery is not a standard size as a traditional battery, it helps to keep the battery in place.

    With that said, it is also possible to install a second smaller battery on the other side of the battery (like a SLA or gel-cell [i.e. NOT a battery that can leak fluid/acid], that way you can use it for charging cell phones, accessories, etc. without taking power away from the main user like my radio!
    Reviewed in the United States on April 3, 2024
    Size: Group 24-31Verified Purchase
    Upgraded from a small lead acid to LiFePo and needed a larger box.
    Works very well
    Reviewed in the United States on March 9, 2024
    Size: Group 24-31Verified Purchase
    Looks good. Cant tell how durable it is, but hope it lasts anlong time
    One person found this helpful
    Report
    Reviewed in the United States on December 18, 2023
    Size: Group 24-31Verified Purchase
    Its hard to beat the price point especially with the extras. Things to know about the 24-31 size box in Dec 2023 that I had a hard time figuring out exactly in the description (look at my photos).

    1. It does have a divider and some grooved slats, but the divider is not solid. It should help keep a size 24 battery from sliding around. I might put a small battery maintainer in the empty space.

    2. It comes with a strap, but its not obvious not to tighten it down (my pictures might help). It also comes with two mounting clamps that you screw into the side of your boat/whatever that I'm assuming you pass the strap through to the the entire thing secure. This is still a nice bonus because the didn't have to include it.

    3. It has top vents. Probably because Hydrogen is light and will fill the top of any space so thats why almost all battery cases have top vents. It has small plastic vent covers with a spacer that will probably break off over time leave open vent slats. But still nice try to reduce water entering.

    Still a great deal for what you get.
    Customer image
    5.0 out of 5 stars 24-31 size has divider, top vents and a strap
    Reviewed in the United States on December 18, 2023
    Its hard to beat the price point especially with the extras. Things to know about the 24-31 size box in Dec 2023 that I had a hard time figuring out exactly in the description (look at my photos).

    1. It does have a divider and some grooved slats, but the divider is not solid. It should help keep a size 24 battery from sliding around. I might put a small battery maintainer in the empty space.

    2. It comes with a strap, but its not obvious not to tighten it down (my pictures might help). It also comes with two mounting clamps that you screw into the side of your boat/whatever that I'm assuming you pass the strap through to the the entire thing secure. This is still a nice bonus because the didn't have to include it.

    3. It has top vents. Probably because Hydrogen is light and will fill the top of any space so thats why almost all battery cases have top vents. It has small plastic vent covers with a spacer that will probably break off over time leave open vent slats. But still nice try to reduce water entering.

    Still a great deal for what you get.
    Images in this review
    Customer image Customer image Customer image Customer image Customer image Customer image Customer image Customer image
    Customer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer image
    8 people found this helpful
    Report

    Top reviews from other countries

    Translate all reviews to English
    Thomas Wolstenholme
    5.0 out of 5 stars Very Good Product
    Reviewed in Canada on July 2, 2021
    Size: Group 24-31Verified Purchase
    I bought this for our small aluminium boat to use with an electric trolling motor. The embossed lettering on the case stated that it could accommodate up to a size 30 battery; it's incorrect as it takes my size 31. The passage ports for the cables are amply sized and I've wired in a bilge pump as well. Everything fits as it should. The only downside is that one of the two top cap vent covers was missing from the box. To keep out the rain, I've sealed it with Gorilla tape, as I remove the battery for charging elsewhere, i.e., not in the case. It's a good product and made in the USA, not China.
    きっと自分は逸般人@北海道
    5.0 out of 5 stars 持ち運ぶってレベルじゃねーぞ(嬉)
    Reviewed in Japan on November 1, 2021
    Size: Group 24-31Verified Purchase
    DelcoのM31MF M31MF がドンピシャで入ります。
    ちなみにM31MFは12Vの115Ahが定格ですので、Whで言うなら1380Wh。
    ハヤりのポタ電(3.6V)風に表示するなら、約38万3千mAh。

    といううことはこのハコ(0.2万円)、M31MF(1.3万円)、2kWインバータ(1万弱)、充電器(0.2万円)、プラスアルファのお手持ちの配線資材やら、の計3万円弱で、15万円クラスのポタ電と同様のものが作れちゃいます。未来がこんなところに。
    (ちなみに当方北海道在住ですが、リチウムな市販ポタ電では冬場(低温時)まったくお話にならないところ、鉛電池であればかなりまともに使えます。)

    …が。重いんですよ。えーもう、死ぬほど重いです。
    多分2kg程度の周辺資材を除くとしても、M31MF単体でさえ公称25.5kg。
    さっすがアメリカ製の当ケース、アチラの人種なら歯ぁ光らせて「HAHAHA!」とか言いながらヒョイっとモテる、いや、持てるのかも知れませんが(偏見)、貧弱なアジア人にはちょいとキビしい質量でございます。
    しかもたいてい、この手のものって床(地面)の高さに置きますから、運ぶときはそれを腰の高さまで持ち上げて…。

    面白がって作るのは止めませんが、その前に、米3袋、または1.5Lペットボトル6本カートン3箱、あたりに相当する質量ののカタマリを、自分は容易に運べるのか?というのをよーく考えることをおすすめします…。
    (なお、死ぬ思いで持ち上げてみたところ、取っ手なども含めた意味でハコそのものの強度にはまったく不安がありません。さっすがアメリカ製。)
    22 people found this helpful
    Report
    Simon King
    5.0 out of 5 stars Arrived a day before delivery estimate. My marine leisure ...
    Reviewed in the United Kingdom on March 12, 2015
    Size: Group 24-31Verified Purchase
    Arrived a day before delivery estimate. My marine leisure battery fits in this perfectly, as if it was made for it.
    It has accommodating gaps in the lid to allow for the cables to come out.
    Mark Hurst
    5.0 out of 5 stars Solid box at a great price
    Reviewed in Canada on July 8, 2023
    Size: Group 24-31Verified Purchase
    A little more expensive than some others but definitely good quality and worth the money.
    One person found this helpful
    Report
    釣りパパ
    4.0 out of 5 stars 丈夫ですね。
    Reviewed in Japan on December 25, 2022
    Size: Group 24-31Verified Purchase
    車中泊でバッテリー入れて使用していますがかなりgoodです。ただ、安全性を考慮してなのか蓋が外しにくいのがマイナス1ですね。