NERMAK 12V 10Ah Lithium LiFePO4 Deep Cycle Battery

Curated from 58 real Reddit conversations

Refreshed on: January 13, 2025

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NERMAK 12V 10Ah Lithium LiFePO4 Deep Cycle Battery

Brand: NERMAK
Price: $39
Snoop Score:
3.7
Sentiment
2.0
Popularity
2.0
Technical
4.7
Buy on Amazon for $39See All 12V Reviews
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Snoop's Take

NERMAK’s 12V 10Ah Lithium LiFePO4 Deep Cycle Battery is engineered for a range of power applications, from solar and wind energy setups to backup systems and specialty devices. Designed to deliver long cycle life and built-in safety through its 10A BMS, it aims to offer a dependable power source for lightweight yet diverse needs. Consumer sentiment has been a mixed bag with one user noting, “They're so light, they almost feel fake,” praising its portability, while others raise red flags about charging inconsistencies and current output limitations. Comments such as "the batteries won’t fully charge as 28.5V vs 29.2V charging voltage" and concerns over the 10A limit highlight performance shortcomings under load, and even the dual-BMS design in the two-pack variant has been critiqued. Overall, the debate tempers enthusiasm with realistic concerns, reflecting a product that may excel in niche settings but falters under high-demand scenarios. In summary, while the battery’s lightweight build and extensive cycle life are attractive, the recurring issues related to voltage and output make it a product recommended only for users with modest power demands and a readiness to monitor performance closely.

Not for you? Check out our other rated 12V

They're so light, they almost feel fake.

Positive Feedback

the batteries won’t fully charge as 28.5V vs 29.2V charging voltage and maximum current production.

Negative Feedback
Product
3.7
NERMAK 12V 10Ah Lithium LiFePO4 Deep Cycle Battery
Buy on Amazon for $39
Home Security Devices
5 / 10
LED Lighting Systems
2 / 10
Automotive Accessories
5 / 10
Emergency Backup
9 / 10
See how this compares to all 12V

What it does well!

Key strengths users can’t stop talking about.
Lightweight and reliable performance
“They're so light, they almost feel fake.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Incomplete charging voltage
“the batteries won’t fully charge as 28.5V vs 29.2V charging voltage and maximum current production.”➕
Limited 10A current output
“Are you using it with a small enough load that the 10A rating is acceptable?”➕
Under load performance concerns
“It's now connected and under load. The answer may be that I bought an economy battery on Amazon.”➕
Two-pack design less optimal due to dual BMS
“A single battery is better because of the single BMS.”➕

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Core Power Plays

The specs and strengths that make it shine.
Terminal connection design clarification
“The terminals are m8. Get you some bolts to thread onto it.”➕
“It looks like he could just screw down properly rated O rings (crimped to proper awg of wires) with those plastic capped studs.”➕
“You can probably pop the orange plastic bits off the bolts and use the alligator clips onto the bolt head.”➕
“The battery has bolts because you don’t want to pull heavy sustained currents through alligator clips.”➕
UPS LiFePO4 compatibility and performance details
“Lifepo4 has a damn near identical charge curve as lead acid and lead acid technologies like AGM.”➕
“Just know that even if everything checks out, it will likely not end up charging the lithium battery to 100% capacity.”➕
“I did, and it works fine.”➕
“i've swapped w Lifepo4s in to UPS quite numerously now.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Alternative use as automotive jumper box power
“The other day I was using NERMAK 2 Pack 12V 10Ah Lithium Ion LiFePO4.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Vehicle battery substitution trade-offs
“You will probably gain performance using these batteries, but lose runtime.”➕
“They charge so much faster than the lead acid batteries.”➕
UPS runtime improvements with LiFePO4 upgrades
“Run time went from 10min to 50min.”➕
“As an employee for APC, this scares the f*** out of me.”➕
“Now system runs for about 50min at 600w load.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
Alternative lithium battery brand experiences
“Norsk have been pretty good for me”➕
“Amped is good.”➕
“I’ve been happy with my amped outdoors batteries I have 3 different sizes”➕
Mixed reliability experiences with cheap lithium batteries
“Personally I’ll stick to LiTime. No problems in 4 years now.”➕
“You’re just paying for extra marketing with the Dakota batteries. They’re not worth paying 2-3x the cost, in my opinion.”➕
“Not sure if they will end up honoring the warranty or not, but for now they are just asking a ton of questions.”➕
“I hope I don't have any bad experiences with it.”➕

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