12V 100Ah LiFePO4 Lithium Battery (2 Pack) BCI Group 31 with Low-Temp Protection, A+ Grade Cell Built-in 100A BMS, 12 Volt Lithium Battery Perfect for RV, Solar System, Off-Grid, Home Energy
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This item is eligible for return within 30 days of receipt
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Availability:
In Stock.
Arrives
Apr 21 – Apr 22
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Style: 12V 100Ah Group 31(2 Pack)
Features
- Meet the Needs of Various ScenariosDyness 12V 100Ah LiFePO4 Battery measures 13.0*6.77*8.43 Inch and only 25.3 lbs. Significantly smaller and lighter than traditional batteries. Connect up to 4 in series and 4 in parallel to build a massive 20.48kWh energy bank. Ideal for: RVs & CampingSolar Systems & Off-Grid LivingHome Energy StorageBoating. Enjoy the same high performance while saving space (nearly 50% smaller) and weight (over 65% lighter) compared to equivalent lead-acid batteries.
- Premium A+ Grade Cells & 4000+ Deep CyclesDyness 12V LiFePO4 Battery engineered with top-tier A-Grade LiFePO4 cells, which delivers exceptional longevity, higher power density, and inherent safety. Enjoy peace of mind with: 110-Year Lifespan: Lasts up to 6X longer than standard lead-acid batteries.2Superior Energy Density: Packs 3-5X more power in the same space vs. traditional batteries.3Rigorous Safety Assurance: Independently tested and certified to global standards including FCC, CE, RoHS, and UN38.3 for reliable operation. Each A+ grade battery cell is tested by a professional engineering team, so you can trace the production parameters of each cell
- Low-Temp Charging ProtectionDon't let winter kill your battery! Dyness 12V lithium Battery with low temperature charging protection feature, automatically disconnects charging when the Dyness 12V 100Ah LiFePO4 Battery's temperature drops below 32F (0C), with charging resuming at 41F (5C). Additionally, it automatically cuts off power at -4F (-20C) to further safeguard the battery. This means: No more cold-weather damage during charging Extended battery lifespan season after season True peace of mind in RVs, cabins, or off-grid setups
- All-in-One Safety Shield-100A BMSDyness 100Ah LiFePO4 battery with smart 100A BMS provides comprehensive protection against overcharging, over-discharging, overcurrent, overheating, and short circuits, along with dust resistance, salt spray resistance and IP65 waterproofing. Engineered for relentless reliability in RVs, marine use, and off-grid living
- Fast & Safe Charging OptimizedMaximize the Dyness 12V LiFePO4 battery's performance, we recommend using a LiFePO4-Specific charger (B0FDKGTMJT) for fastest/safest fully chage. Recommend recharging at 0.2C for optimal battery health. If you have any questions during the charging process, please contact us.
- After-Sales ServiceDyness provide professional technical support and online customer service with fast response within 24 hours. If you have any product-related issues or questions, don't hesitate to contact us directly, the Dyness support team is always here for you
Number of Batteries: 1 12V batteries required.
Brand: Dyness
Battery Cell Composition: Lithium Ion
Battery Capacity: 100 Amp Hours
Recommended Uses For Product: RV
Number of Batteries: 1 12V batteries required.
Brand: Dyness
Model Number: AR1.2
Model Name: AR1.2
Manufacturer: Dyness
Built-In Media: AR1.2
Warranty Description: 5 Year Manufacturer
Voltage: 12.8 Volts
Battery Capacity: 100 Amp Hours
Unit Count: 2.0 Count
Battery Weight: 25.3 Pounds
Item Dimensions: 13 x 6.77 x 8.42 inches
Item Weight: 25.3 Pounds
Antenna Location: RV
Battery Cell Type: Lithium Ion
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Apr 21 – Apr 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Style: 12V 100Ah Group 31(2 Pack)
Only had them for a few days. I bought these two,100ah batteries, to set up a 200ah 12v system. I'm running a AC powered fridge off a 3000watt inverter. I gave them a full charge, 14.5v is where I think the charger charged them to. I left the charger go untill it showed a full charge. after hitting 14.5 the charger stayed around that voltage for a couple hours before it stopped charging. It was probably equalizing the cells. After unhooking the charger they settled to 13.8. I hooked them up and left them run my inverter with the fridge on all night. Also ran some lights before I went to bed. In the morning, the voltage was down to 13.3v. I have them hooked up to my solar power and they are charging back up. Only took a couple's of hours to reach 13.6v. I'd say these are good batteries. I only have 520watts of solar with a pwm controller. Waiting on an upgraded mppt controller to be delivered. With a mppt controller combined with these batteries, I should have power for days. Lol. Note, make sure you give them a full charge before using. I have the batteries wired in parallel to get maximum amp hours.
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Reviewed in the United States on February 2, 2026 by Rick
Style: 12V 100Ah Group 31(2 Pack)
I don’t think you can get a better battery for the price. Great customer service great design and function. Perfect for my solar set up. I bought two highly recommended.
Reviewed in the United States on November 6, 2025 by Kelly McGinnis
Style: 12V 100Ah Group 31(2 Pack)
Seems well. Only had them for about a month. So far they're doing great. Time will tell.
Reviewed in the United States on November 13, 2025 by Hndyman
Style: 12V 100Ah Group 31(2 Pack)
Have these batteries set up in parallel for my shop, using 3000 watt inverter and 4 100 watt solar panels, work my ham radio station and a 1300 watt heater for several hours a day with 3 batteries total
Reviewed in the United States on October 29, 2025 by Thomas C.
Style: 12V 100Ah Group 31(2 Pack)
After following the instructions on pre charging each battery before installing them. They are functioning very well on my small solar system. They replaced two AGM batteries that did ok. However these have more usable Wh. Dave
Reviewed in the United States on January 31, 2026 by David Moore
Style: 12V 100Ah Group 31(2 Pack)
These batteries were delivered on time and were already charged. I experienced some issues where I was not sure if it was the solar equipment (it was) or the batteries. Their support staff was extremely helpful and easy to work with. They provided solutions for the solar equipment and did not have to: I highly recommend Dyness. I will buy from them again.
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Reviewed in the United States on June 11, 2025 by ehansen
Style: 12V 100Ah Group 31(2 Pack)
They are not that heavy to carry and easy to use as the instructions explains. Look to buy two more in near future.
Reviewed in the United States on December 1, 2025 by Lorretta
Style: 12V 100Ah Group 31(2 Pack)
These batteries are Amazing!
Reviewed in the United States on September 13, 2025 by AmazonCustomer