12V 100Ah Lithium LiFePO4 Deep Cycle Battery, 4000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar, RV, Marine, Home Energy Storage, Off-Grid Applications Built-in 100A BMS
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At a glance
- Condition
- New
- Style
- 12V 100Ah
- Dimensions
- 6.3"D x 12.79"W x 8.66"H
- Weight
- 24.1 lb
- Vehicle Service Type
- RV
- Voltage
- 12.8 Volts
- Terminal
- M8
Features 4
- Superior Performance: NERMAK 12.8V 100Ah Li-FePO4 battery consists of 4 cells, Built-in 100A BMS with overcharge, over-discharge, over-current and short circuit,Lithium iron phosphate battery has high energy density, Long cycle life, Good safety performance, No memory effect, etc.(Note: Our batteries cannot be used as car starting batteries!)
- Long life & light weight: 4000+ cycles of lithium-ion batteries are no problem, while traditional lead-acid batteries only have 500-800 cycles. The battery does not contain acid, which is safer and more environmentally friendly than lead-acid batteries. Our lithium iron phosphate battery weighs only 24.3 pounds, which is only 1/3 of the weight of a lead-acid battery.
- Widely Uses: Widely uses in most areas such as: Emergency Lighting, RV/outdoor camping, Marine, Home Energy Storage, Computer Power Backup, Off-Grid applications, Solar Panel Wind Energy Storage and more...
- Expansion and Recharge: NERMAK 12 V 100Ah LiFePO4 battery can be connected in series or parallel, in series, Up to 4 identical batteries can be connected,Quick charge by 50A , and heavy-duty output discharge up to 100A continuous and 3C Pulse(5 seconds).
Specs 12
| Brand | NERMAK |
|---|---|
| Vehicle Service Type | RV |
| Size | 12V 100Ah |
| Voltage | 12.8 Volts |
| Battery Cell Composition | Lithium Ion |
| Item Weight | 24.1 Pounds |
| Product Dimensions | 6.3"D x 12.79"W x 8.66"H |
| Terminal | M8 |
| Battery Capacity | 100 Amp Hours |
| Manufacturer | NERMAK |
| Item model number | 12100 |
| Batteries | 1 Lithium Ion batteries required. (included) |
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This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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Top Amazon Reviews
Update - failed within 1 day
Style: 12V 18Ah
Update 4 days later, 10/11/2024 Well...this did not work out. The battery arrived and was installed on Monday, just before Hurricane Milton struck Wednesday night. After a1/2 second test crank (which was fine), the battery was connected to a new LiFePo4 battery charger designed for this battery chemistry. The charger itself may be suspect, as the battery would not accept a charge. The charger displayed a fault mode after a few hours. I then connected it to a known good charger. After a charge of several hours at 2amps, the charger had to be disconnected as we prepped for the storm. A quick check on Tuesday (the next day) found that the generator would not start. Did not have time to do diagnostics with the storm coming. Had to pull-start the generator after we lost power Wednesday evening. Did diagnostics today, Friday 10/11. No problem with the starter motor, as it started immediately with my portable jumper pack. The Nermark battery showed less than 10V on my DVM. Both chargers displayed a battery fault, and were unable to charge the battery above 10.3V. It's possible there was an issue with the built-in BMS (Battery Management System), but I don't know. It's getting returned once Whole Foods is open again. Original Review 10/7/2024 Very simple installation to remove the old sealed lead acid 12-18 battery and replace it with this one. I have been using LiFePo4 batteries in my RC aircraft for over 20 years and I'm glad that this battery is available to replace the typical unreliable lead acid battery that is used as a starter in portable equipment. I took the opportunity to install the terminal rings and cable for the appropriate 3 amp charger and even without completing the charge, did a quick test start on my generator. I hope it will last several years, as this generator is only used for hurricane emergencies. However, I have batteries of this chemistry that are over 20 years old and still hold 80% or more of their charge. I will report back and update this review in the event that there are any failures, or possibly great news to continue to report years from now.
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Reviewed in the United States on October 7, 2024 by RCAddiction RCAddiction
Great cost for an effective replacement.
Style: 12V 10Ah-2PACK
Although slightly shorter in height than original batteries, work like a charm. I have replaced the batteries in a 90's fold n go power scooter with these amazing little gems. Can and does still use its original charger, battery pack is now half the weight of what it used to be, and packs quite the punch. Installed very easily by swapping everything over to the new batteries, fully charged in very little time and scooter that had been sitting for years was back on the road.
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Reviewed in the United States on August 14, 2025 by Devon Hills
Wonderful Upgrade Over Gelpack Power
Style: 12V 10Ah
Wow! After getting only a single season out of conventional gel pack 12v batteries I bought this one to use on my Vexilar FL-18. For only a few bucks more it works great. I fished three days straight in a wheelhouse without charging the Nermak battery. I can't recommend it highly enough. (Be sure you have a charger designed for lithium batteries)
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Reviewed in the United States on January 26, 2026 by Woodtick Rick
Not ideal for lead acid battery replacement for UPS
Style: 12V 10Ah-2PACK
I’d recommend against usage for “legacy” UPS lead acid battery replacement, specifically the common case of quantity 4 or 2 battery systems. These usually are setup with the batteries in series (4x12v = 48v, 2x12v=24v). You are likely better off throwing the legacy lead acid battery UPS away, and buying a lifepo4 based UPS. Even the Lifepo4 portable batteries like the power 1000 have UPS capability. The ups devices that start with a lifepo4 energy source usually have passive and active cooling for the battery array, in addition to the inverter components. There are a few problems with using these in a legacy lead acid battery UPS: 1. The continuous output current is far lower than lead acid batteries. The typical Lifepo4 compatible battery option is rated at 10amp continuous. So, in a 4 battery series system, you’ll get at most about 135w continuous output per battery - so about 500watt max. You won’t get anything near the potential needed in common 1000w, 1500w, and 2000w ups. 2. The BMS present in the lifepo4 batteries generally needs at least exposed passive cooling, or even active cooling. These are enclosed package batteries, so cooling is limited at best. 3. With 4 12v lifepo4 batteries in series, you’d basically need another BMS to manage the 4 batteries, or the discharge and charge levels between batteries becomes imbalanced. 4. The charging circuit will not fully charge lifepo4 batteries, in most cases. Lead acid vs. lifepo4 have different max voltage levels. 5. The legacy ups doesn’t know the proper estimated runtime or charge level of lifepo4 batteries. This is a relatively minor issue compared to above. Technically, a 48v lifepo4 pack that fits most UPS battery compartments could be built to handle several of the issues above. As an experiment, I fully charged up 4 of these individually outside a UPS, then installed them in the ups. Verified the output of the pack was approx 55.8v. The charge/discharge circuit ”popped” with the telltale electronics burning smell, with smoke, when a 200w load AC power fail test was triggered. These batteries may be ok for some cases, like the single battery backup common to home alarm system panels.
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Reviewed in the United States on March 10, 2025 by S
Will last and last
Style: 12V 20Ah
Today Feb. 2 2026. Ordered 3 battery's on March 2025. For 36 volt use. Use them in three wheel bicycle almost daily weather permitting. These guys have never died on me anytime. Look I ride over 2 hours when I go. Battery's are great plus cost. Won't go wrong but them.
Reviewed in the United States on March 2, 2026 by Boe