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  • 9 VIDEOS
  • 100Ah 12V Lithium-Ion (LiFePO4) RV, Marine, Solar, & Off Grid Battery - Internal BMS, High & Low Temperature Protection - Battle Born Batteries
  • Unboxing the Battle Born Batteries 100Ah 12V Lithium BatteryBattle Born Batteries

100Ah 12V Lithium-Ion (LiFePO4) RV, Marine, Solar, & Off Grid Battery - Internal BMS, High & Low Temperature Protection - Battle Born Batteries

4.5 out of 5 stars (809)

$799.22
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About this item

  • Drop-in replacement for Group 27 & 31 batteries.
  • Designed for versatility with the ability to be wired in series or parallel and mounted in any orientation.
  • Safe & reliable lithium iron phosphate (LiFePO4) chemistry.
  • Rugged battery design built for RV, camper van, boat, trolling motor, industrial, off-grid, and residential backup applications.
  • Lightweight at just 31 pounds for 100Ah of usable power.
  • Long-lasting with 3,000-5,000 deep discharge cycles providing up to 10-15 years of power.
  • Internal BMS featuring low temperature protection, high and low voltage, short circuits, and more.
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This item: 100Ah 12V Lithium-Ion (LiFePO4) RV, Marine, Solar, & Off Grid Battery - Internal BMS, High & Low Temperature Protection - Battle Born Batteries
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Product description

Battle Born 100 Amp Hour 12V lithium (LiFePO4) battery.
Battle Born Batteries offer maximum flexibility for any space.
Battle Born offers ultimate safety, backed by a proprietary Battery Management System.
Battle Born Batteries are built with cylindrical cells, ensuring increased safety & reliability.
Trusted by your favorite adventure enthusiasts from RVs, to marine vessels, to off grid systems.
If you are looking for unstoppable power solutions, shop Battle Born.
100Ah 12V LiFePO4 Deep Cycle Battery
100Ah 12V (GC2) LiFePO4 Deep Cycle Battery
270Ah 12V (GC3) LiFePO4 Deep Cycle Battery
50Ah 24V LiFePO4 Deep Cycle Battery
75Ah 12V Group 24 LiFePO4 Deep Cycle Battery
Customer Reviews
4.5 out of 5 stars 809
4.8 out of 5 stars 23
5.0 out of 5 stars 4
4.2 out of 5 stars 17
3.9 out of 5 stars 9
Price $799.22 $799.00 $2,299.00 $879.00 $699.00
Amp Hours 100Ah 100Ah 270Ah 50Ah 75Ah
Voltage 12V 12V 12V 24V 12V
Weight 31 lbs. 31 lbs. 81 lbs. 31 lbs. 27 lbs.
Battery Group Size Group 27 & 31 GC2 Proprietary Form Factor Group 27 & 31 Group 24
Charging Voltage 14.2 - 14.6V 14.2 - 14.6V 14.2 - 14.6V 28.4V - 29.2V 14.2 - 14.6V
Float Voltage 13.4 - 13.8V 13.4 - 13.8V 13.4 - 13.8V 26.8 - 27.6V 13.4 - 13.8V
Safe, Non-Toxic LiFePO4 Chemistry
Internal Battery Management System (BMS)

Product information

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100Ah 12V Lithium-Ion (LiFePO4) RV, Marine, Solar, & Off Grid Battery - Internal BMS, High & Low Temperature Protection - Battle Born Batteries


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What's in the box

  • 100Ah 12V LiFePO4 Battery and Installation Hardware
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    Customer reviews

    4.5 out of 5 stars
    809 global ratings
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    Customers say

    Customers find this lithium battery to be the best they can buy, praising its high capacity and ability to keep them 100% charged. They appreciate its reliability, with some reporting it performs well for years, though others experienced complete failure after three years. The battery receives positive feedback for its safety features, with one customer noting the internal BMS system prevents damage, and its lighter weight compared to alternatives. While some customers consider it well worth the money, others find it expensive.
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    70 customers mention battery quality, 64 positive, 6 negative
    Customers praise the battery's quality, describing it as the best lithium battery available, particularly suitable for solar systems.
    Great battery, good people to deal with ( Battleborn). Battery is much lighter, faster charging and dropped right in where the other battery was....Read more
    They are on the pricey side but great batteries if you can afford them. Customer service has been amazing (USA based).Read more
    Great Product...but FedEx dropped the ball.Read more
    Best batteries I've seen for solar energy system in an RV. These, combined with Victron Energy components, will allow me days or weeks off-grid.Read more
    54 customers mention charging capability, 38 positive, 16 negative
    Customers find the battery's charging capability positive, with several noting it keeps them fully charged. One customer mentions it provides power without noticeable loss, while another reports it maintains 80% of its reserve power.
    Maintaining voltage as promised. Lightweight and powerful.Read more
    ...It still had plenty of juice in it to power some devices after installing it, and it didn't die on me after a few days in storage with minimal load....Read more
    ...We set them too low and they would not recharge. Now we hae them on the high side, so we are losing some power....Read more
    holds the charge and can be discharged a 100%. no cons.Read more
    41 customers mention battery life, 29 positive, 12 negative
    Customers are satisfied with the battery's performance, noting it lasts a very long time, with one customer mentioning it can power a DC fridge for days.
    ...lithium battery from Battle Born provides me with a better, longer lasting, battery resource and, with very little effort, it integrated seamlessly...Read more
    ...The battery is light, reliable, durable, and high capacity. Love it so far!Read more
    ...usage and always placed on a Noco trickle charger after use, the battery is DEAD. I tried emailing and calling the company with no response!...Read more
    ...they recharge much faster and less expensive due to their long life expectancy. And no water needed!Read more
    30 customers mention weight, 28 positive, 2 negative
    Customers appreciate that the battery is lighter.
    These batteries are light weight compared to sla batteries. They charge fast and in the winter on solar that is a big plus....Read more
    ...I really like this battery, it's safe, it's reliable, it's lightweight, no maintenance required, it's bulletproof in the sense that you don't have...Read more
    ...They are way expensive but so much lighter, longer lasting and environmentally friendly compared to lead that I went ahead and took the plunge....Read more
    Light weight battery. Perfect for my conversion van. There's obviously a problem with one or both of them can't run a 700watt appliance....Read more
    9 customers mention battery protection, 8 positive, 1 negative
    Customers appreciate the battery's safety features, with one mentioning the internal battery management system that prevents damage.
    ...I really like this battery, it's safe, it's reliable, it's lightweight, no maintenance required, it's bulletproof in the sense that you don't have...Read more
    ...Service life, battery protection, and just the best BMS! Will save you money in the long run!Read more
    ...Also the built in management system means they’ll protect themselves from things that could harm them wether it’s a deep discharge or weather or...Read more
    ...The warrantee is much better now and the Battery management System keeps you from damaging your battery....Read more
    8 customers mention battery capacity, 8 positive, 0 negative
    Customers appreciate the battery's capacity, with one mentioning it can power up to 6 LED ceiling lights.
    ...The battery is light, reliable, durable, and high capacity. Love it so far!Read more
    ...Second, their batteries are designed with many cells, 120 I think, whereas others are usually only 3 cells — if there is a problem with a cell in...Read more
    ...It powered the inverter, which fed to 6 LED ceiling lights, a water pump, USB outlets keeping two cell phones, two laptops, one SLR camera, one...Read more
    ...With the longest warranty of 10 years and the ability to use all the batteries power, it makes it perfect for camping in places without power...Read more
    65 customers mention value for money, 31 positive, 34 negative
    Customers have mixed opinions about the battery's value for money, with some finding it well worth the cost and noting it's cheaper than lead acid alternatives, while others consider it expensive.
    ...They charge fast and in the winter on solar that is a big plus. Expensive maybe, not in the long run. No maintenance, and no fumes....Read more
    Worth the money! Such a massive improvement in capacity and charging speed over the marine batteries they replaced.Read more
    ...They are expensive but will probably last for our remaining boondocking lifestyle.Read more
    These batteries are very high quality - great value and light weight....Read more
    60 customers mention reliability, 41 positive, 19 negative
    Customers have mixed experiences with the battery's reliability, with some reporting it performed well for years and worked effectively with their setups, while others experienced failures during critical times and issues with intermittent operation.
    We are using the batteries in our camp. They work great and supply enough power to run our tv, internet, phone and lights for several hours without...Read more
    Worked great! Definitely worth the money. 12v 100Ah Lithium Battery for under $1000 shipped is cheap.Read more
    ...But the two batteries started to fail and when I contacted battleborn I was told I would have to do all sorts of testing and also be subject to all...Read more
    ...I really like this battery, it's safe, it's reliable, it's lightweight, no maintenance required, it's bulletproof in the sense that you don't have...Read more
    Small off grid situation
    5 out of 5 stars
    Small off grid situation
    EDIT: Just received my 3rd battery, plan on using that one on its own on a separate solar setup, replacing some CG2 golf cart batteries that are at the end of their lives. As of today, I now own 2 of these batteries, they work great for me. I purchased the first one last summer, I'm using it on a small off grid solar system, not grid tied. I added the second one just today, hooked up in parallel to keep it at 12 volts but now with 200 amp hours. Since these are LiFePO4 batteries, it's OK to add a new battery to one that is nearly a year old. I contacted the good folk at BattleBorn and confirmed it was fine to do and to confirm the best method of tying them together, which is making sure both are charged fully then to make a parallel connection, connect both negatives together, then connect both positives together. These types of batteries are expensive, but if you take into consideration the lifespan of the batteries and the fact that you can use up to 100% of the battery capacity, (though it's still best to not use 100%) these are ultimately a bargain in the long run. One bit of advice, assuming you are using a MPPT charge controller, if you do run the battery down where the internal BMS cuts it off, the MPPT charge controller will not begin to charge the battery if it can't detect the battery, you will need to "jump start" the battery using another power source, we use a portable 12 volt battery jumper, the kind you use to jump start a car battery, once the MPPT charge controller sees some voltage on the battery, it will then allow the battery to be charged. I really like this battery, it's safe, it's reliable, it's lightweight, no maintenance required, it's bulletproof in the sense that you don't have to baby it (don't really shoot it 🤣).
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    Top reviews from the United States

    • 5 out of 5 stars
      Performance, reliability, convenience. Excellent product!
      Reviewed in the United States on January 15, 2018
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      I am very pleased with this battery. I have had it for 6 months and it is great. Very reliable, zero maintenance. I have it hooked up to a 300w solar system on my camper van/RV and it charges very fast. I even hooked it up to a 450/900 watt space heater and ran it for 1.5hr on the lower 450 watt setting via a 600w (1200w surge) inverter. It raised the temperate of the RV interior from 55F to 67F in 1 hour (outside temp was 52F with @ 50% humidity in the evening). This was just a test I ran to see what it was capable of. While it did discharge the battery, it performed flawlessly during that time and helped me to learn about how the battery reacts to large loads. The next day I checked on the battery @ noon and it was at full charge from the morning sun. The battery also performed perfectly on a 3k mile, 1 week road trip. It powered the inverter, which fed to 6 LED ceiling lights, a water pump, USB outlets keeping two cell phones, two laptops, one SLR camera, one Dometic fridge running 24/7 without any drop in temperature. Food was always cold. Cold beer in the middle of the desert anytime you wanted. I plan on adding to my solar bank soon with another Battle Born battery and a more powerful inverter so I can run a 1200w water heater and improve the space heater's performance (only as backup in case of extreme cold). I have not contacted customer support yet for any reason but based on other reviews I am confident that area is just as good as the battery itself. I highly recommend this product.

      Update (2020): My Battle Born battery was experiencing some minor issue one year in. I would lose power for 2-3 seconds once a day or every couple days. The power would turn off and come right back on again. I contacted Battle Born and they said it was caused by the BMS (battery management system) in batches produced around the time I purchased my battery. I shipped the battery back to them (they paid for shipping) and they sent me a new replacement battery which has been working perfectly for 2 years now. Their customer support is top notch as is their warranty. I will not be buying any other battery except Battle Born as my experience with this battery and the company has been excellent.

      186 people found this helpful
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    • 5 out of 5 stars
      Great Drop-In Replacement for RV House Batteries
      Reviewed in the United States on July 18, 2018
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      Purchased one of these to "dip my toe in the water" into lithium for my RV. So far I am very impressed! I will be looking to add at least one more in parallel soon to increase my capacity.

      First the shipping. It was shipped in an oversized box with plenty of molded-foam packing around it, so it arrived in perfect condition. I would not worry at all about damage from shipping with how well they have packaged it. The battery is then wrapped in plastic to (I assume) prevent accidental shorting of the terminals.

      What's in the box? Of course the battery, but also 5/16" bolts and nuts. I had overlooked in the description on their site that the bolt set was included, so I was concerned that I would have to figure out how to connect to the terminals myself. But no, the bolt set is included, you're good to go. I'd recommend using cables with 5/16" lugs rather than 3/8" to prevent it from wiggling. I also was able to relatively easily add a terminal-mount catastrophic fuse, although the terminal is a little close to the plastic so I wasn't able to orient the fuse holder the way I wanted it to. Not a big deal though.

      I am not sure of the state of charge when I received it, but if I had to guess it was around 50-80%. It still had plenty of juice in it to power some devices after installing it, and it didn't die on me after a few days in storage with minimal load. A few days later I hooked it up to solar and it's been running great ever since.

      The battery is nice and light. If you're concerned about weight in your RV, this is a great way to go. In order to get the same amount of usable capacity in lead-acid batteries, it would have added about 100 lbs. I'm happy that I can now double this capacity for just 30 lbs more weight. I'll update the review if I have any problems, but initial results are positive. While you might get more bang for your buck with a custom LiFePO4 setup complete with external BMS, this is so much simpler as a drop-in replacement for a deep cycle battery. The built-in BMS safety measures (under-voltage, over-voltage, short-circuit, low temperature, etc protection) put my mind at ease too.

      86 people found this helpful
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    • 5 out of 5 stars
      Great Quality
      Reviewed in the United States on June 18, 2021
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      Put these in the RV. They have worked very well and we are happy to move away from our wet / lead acid batteries. Really liked the sturdy side post connectors for the wires hooking up to the batteries. Very sturdy. I returned another leading brand because the top posts were so small and flimsy I was having a hard time making all of my connections. Be aware that, for an RV application, you may need to upgrade your controller if you current controller does not have a option to support lithium batteries. My neighbors controller had a switch he could flip for going to lithium. My RV did not. I spent about 250 on my replacement controller and self installed it which was relatively easy in a WFCO power center. Just follow standard safety protocol working with electricity. Some RV owners also need to address an upgrade to their alternator set up if it charges the house batteries and is not set up for the higher voltage of lithium batterie(s). I did not have that issue so I have no insights into that. Lastly if you have solar panels make sure your solar control panel supports lithium. Mine did but sone do not. You can most likely upgrade that too for a couple of hundred bucks if needed. You may also need a lithium charger! They do not come fully charged and there is a requirement to fully charge them before installing to insure proper discharge going forward. The conversion could be a bit pricey, but for me not worrying my batteries making it through the day / night was well worth it. I have had zero battery angst since this upgrade.

      30 people found this helpful
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    • 5 out of 5 stars
      Buy it with confidence
      Reviewed in the United States on September 1, 2021
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      I purchased two of these to replace the lead acid coach batteries in a Coachman CrossFit 22D RV. I put them in as direct replacements with no other modifications to the RV. I then reset the solar charger to Lithium. After 6 months I relocated the batteries form outside the coach to inside under the passenger side sofa. they fit perfectly just in front of the water tank and pump. It has been working flawlessly for over a year. My two lead acid batteries, even though brand new, would run the fridge (yes, it’s a DC electric fridge) and a few lights for about 8 hours before being discharged and disconnecting. These batteries last 28 hours and had an unexpected benefit of making the RV ride a little better as they weigh significantly less than the ones they replaced. They are expensive. But, search for the teardown video on YouTube and you will quickly see what you are paying for. These batteries are worth the cost. Battle Born is a US company in Nevada, and I called them. The tech spent quite while on the phone explaining the built in battery monitor. Yes, the individual cells are Chinese made. But they are very high quality Chinses made, and that does make a difference. I am going to buy two more and double my off the grid battery life. Buy this battery with confidence for your solar applications, for you RV, etc. Do not buy it as a starting battery as it is not well suited for that.

      18 people found this helpful
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    • 5 out of 5 stars
      Small off grid situation
      Reviewed in the United States on April 30, 2020
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      Full content visible, double tap to read brief content.

      EDIT: Just received my 3rd battery, plan on using that one on its own on a separate solar setup, replacing some CG2 golf cart batteries that are at the end of their lives.

      As of today, I now own 2 of these batteries, they work great for me. I purchased the first one last summer, I'm using it on a small off grid solar system, not grid tied. I added the second one just today, hooked up in parallel to keep it at 12 volts but now with 200 amp hours. Since these are LiFePO4 batteries, it's OK to add a new battery to one that is nearly a year old. I contacted the good folk at BattleBorn and confirmed it was fine to do and to confirm the best method of tying them together, which is making sure both are charged fully then to make a parallel connection, connect both negatives together, then connect both positives together.

      These types of batteries are expensive, but if you take into consideration the lifespan of the batteries and the fact that you can use up to 100% of the battery capacity, (though it's still best to not use 100%) these are ultimately a bargain in the long run.

      One bit of advice, assuming you are using a MPPT charge controller, if you do run the battery down where the internal BMS cuts it off, the MPPT charge controller will not begin to charge the battery if it can't detect the battery, you will need to "jump start" the battery using another power source, we use a portable 12 volt battery jumper, the kind you use to jump start a car battery, once the MPPT charge controller sees some voltage on the battery, it will then allow the battery to be charged.

      I really like this battery, it's safe, it's reliable, it's lightweight, no maintenance required, it's bulletproof in the sense that you don't have to baby it (don't really shoot it 🤣).

      Small off grid situation
      5 out of 5 stars
      Small off grid situation
      Reviewed in the United States on April 30, 2020

      EDIT: Just received my 3rd battery, plan on using that one on its own on a separate solar setup, replacing some CG2 golf cart batteries that are at the end of their lives.

      As of today, I now own 2 of these batteries, they work great for me. I purchased the first one last summer, I'm using it on a small off grid solar system, not grid tied. I added the second one just today, hooked up in parallel to keep it at 12 volts but now with 200 amp hours. Since these are LiFePO4 batteries, it's OK to add a new battery to one that is nearly a year old. I contacted the good folk at BattleBorn and confirmed it was fine to do and to confirm the best method of tying them together, which is making sure both are charged fully then to make a parallel connection, connect both negatives together, then connect both positives together.

      These types of batteries are expensive, but if you take into consideration the lifespan of the batteries and the fact that you can use up to 100% of the battery capacity, (though it's still best to not use 100%) these are ultimately a bargain in the long run.

      One bit of advice, assuming you are using a MPPT charge controller, if you do run the battery down where the internal BMS cuts it off, the MPPT charge controller will not begin to charge the battery if it can't detect the battery, you will need to "jump start" the battery using another power source, we use a portable 12 volt battery jumper, the kind you use to jump start a car battery, once the MPPT charge controller sees some voltage on the battery, it will then allow the battery to be charged.

      I really like this battery, it's safe, it's reliable, it's lightweight, no maintenance required, it's bulletproof in the sense that you don't have to baby it (don't really shoot it 🤣).

      48 people found this helpful
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    • 1 out of 5 stars
      Poor value for money. The warranty process is slow and expensive, and they arbitrarily deny claims.
      Reviewed in the United States on November 13, 2025
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      Way overpriced in 2025. 10 year warranty is a pain. I bought 14 of these batteries in 2020, using them in a 7P2S (24V) configuration. One of the batteries recently died. They first advised me how to "wake up" the battery - a perfectly reasonable thing to do. The battery remained dead. Getting a warranty RMA going is OK, but their slow response to emails (two weeks after the RMA I finally got a response with detailed instructions to start the process. These instructions sound imperious and insulting (terms like "not negotiable"). Then, if you don't have the original packaging (I bought these 5 years ago, so I don't have it), their "process" requires 1) sending me an "approved" set of packaging (1 week gone), then I return the battery to them (another week), then 3) allow up to 2-3 weeks for evaluation/repair/replacement, and maybe another week for shipping. Possibly up to 8 weeks to get a replacement, and they charge $349 for postage, which may be eventually reimbursed. If they don't approve the warranty repair, they charge $150/hr for repairs, and you don't get reimbursed for postage. It would be a lot faster and possibly cheaper just to buy another brand at $300 a pop (I bought two and got them installed in three days when I saw how slow things were moving), considering most users actually need their batteries!

      At this price, I would just expect them to send me a replacement, and I would be willing to send the broken battery back to them. For the expense, you don't get kid-glove treatment, that's for sure.

      Update: they claim the battery failure was due to "misuse" - wrong cables (4 gauge can carry 70 Amps - much more than the 30 Amps actually needed), unmatched cable lengths (mine are matched within an inch - what do they want - a millimeter? They now want me to pay for the repair too - another $150 - so that would be $545 in all for a repair on a 5 year old battery. I am not happy.

      84 people found this helpful
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    • 5 out of 5 stars
      PERFECTION MADE IN USA, SUPPORT BATTLEBORN!!!
      Reviewed in the United States on December 11, 2020
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      Awesome batteries that are made in the USA?!

      I have 3 mounted in a bus conversion so weight is kinda important in moving vehicles and thought the batteries were empty inside? 75lbs for 300 amp hours is incredible!

      Also, being able to deplete these way more and frequent compared to the others like lead and gel is a huge win!

      I had gel before these 400amp hours 300lbs? Really heavy and ALWAYS ran out of juice with those because you can’t go this low with them only lithium ion. I have 300 amp hours of battleborn and no issues at all. No more generator!!

      Support this company trust me! Buy once cry once you’ll never regret this! Sell stuff if you have to :)

      10 year warranty? Can withstand cold? Internal BCM computer for safety? Made in USA? 25lbs? YES! I’ll be buying more as my solar array grows.

      Thanks battleborn for making in America but also making a quality product! We also liked how you shipped them very professional packaging and came in perfect condition! A++

      8 people found this helpful
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    • 5 out of 5 stars
      The only LiFePO4 batteries I'll spend my money on
      Reviewed in the United States on February 6, 2026
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      I've had two of these 100Ah Battleborn batteries for 3 years. I've used and abused them from camping in the summer to ice fishing in the winter and they haven't skipped a beat. I've become very cynical about the quality of products these days due to all the junk out there, this isn't the case with Battleborn, they are top notch!

      One person found this helpful
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    Sponsored

    Product Summary: 100Ah 12V Lithium-Ion (LiFePO4) RV, Marine, Solar, & Off Grid Battery - Internal BMS, High & Low Temperature Protection - Battle Born Batteries

    From Battle Born Batteries

    4.5 out of 5 stars, 809 ratings

    Customer reviews

    1K+ viewed in past month

    About this Item

    • Drop-in replacement for Group 27 & 31 batteries.
    • Designed for versatility with the ability to be wired in series or parallel and mounted in any orientation.
    • Safe & reliable lithium iron phosphate (LiFePO4) chemistry.
    • Rugged battery design built for RV, camper van, boat, trolling motor, industrial, off-grid, and residential backup applications.
    • Lightweight at just 31 pounds for 100Ah of usable power.
    • Long-lasting with 3,000-5,000 deep discharge cycles providing up to 10-15 years of power.
    • Internal BMS featuring low temperature protection, high and low voltage, short circuits, and more.

    Product Description

    The powerful battery solution to elevate any outdoor adventure. It’s time to upgrade from your traditional lead acid battery! What you need is a new battery that's lighter, safer, and works with various systems. More importantly, it should be able to keep you company for many of your outdoor adventures! This 100Ah 12V LiFePO4 Deep Cycle Battery by Battle Born Batteries delivers superior and long-lasting performance! Our lithium-ion batteries are designed for long-term use and can last up to 10 times longer than lead-acid batteries, with 3,000-5,000 deep discharge cycles. These LiFePO4 batteries also have an internal Battery Management System (BMS), which protects them from common battery failures like high and low voltage, short circuits, and hot and cold temperatures. Compared to a conventional lead acid battery, our rechargeable Battle born Batteries are 1/5th the weight for the same amount of usable power, weighing in at just 31 lbs. They, too, provide up to 3x more power in the same physical space, and charge 5x faster. With maximum safety, flexibility, and versatility, these LiFePO4 batteries can be wired in series or parallel and installed in any position, orientation, or space. Battle Born Batteries are made with quality in mind. We source our raw materials from reputable suppliers and assemble lithium batteries using cylindrical cells in our 99,000-square-foot facility in Reno, Nevada. More details about our LiFePO4 deep cycle batteries: - Dimensions:12.76 × 6.86 × 8.95 in - Certified for UL-2054, UL-62133, and UN38.8 compliant. - Ships with 18-8 stainless steel 5/16 – 18 1” and 1-1/4” bolts, brass washers, and 18-8 stainless steel nuts with nylon inserts. Invest in a battery and power you can count on.

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