---
product_id: 393550739
title: "12V 18Ah"
brand: "nermak"
price: "R$1035"
currency: BRL
in_stock: true
reviews_count: 5
category: "Nermak"
url: https://www.desertcart.com.br/products/393550739-12v-18ah
store_origin: BR
region: Brazil
---

# 20A continuous heavy-duty output Built-in BMS for solar & UPS safety 2000+ cycles lifespan 12V 18Ah

**Brand:** nermak
**Price:** R$1035
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up smarter, last longer, and stay ahead of the pack!

## Quick Answers

- **What is this?** 12V 18Ah by nermak
- **How much does it cost?** R$1035 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/393550739-12v-18ah)

## Best For

- nermak enthusiasts

## Why This Product

- Trusted nermak brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Safety Inside:** Integrated 20A Battery Management System guards against overcharge, over-discharge, and short circuits for worry-free use.
- • **Versatile Energy Hub:** Perfect for solar setups, marine adventures, scooters, UPS backup, and more—expandable in series or parallel for scalable power.
- • **Power Without the Bulk:** Lightweight at just 5.1 lbs—only a third the weight of traditional lead-acid batteries, making portability effortless.
- • **Endurance That Outlasts:** 2000+ deep cycles—triple the life of lead-acid batteries, powering your projects longer without replacement.
- • **Fast Recharge, Ready When You Are:** Quick 12A charge capability means less downtime and more action, keeping your devices powered and productive.

## Overview

The NERMAK 12V 18Ah LiFePO4 deep cycle battery delivers superior energy density and an impressive 2000+ cycle lifespan, making it a lightweight, eco-friendly alternative to traditional lead-acid batteries. Featuring a built-in 20A Battery Management System, it ensures optimal safety and performance across diverse applications including solar power, marine, UPS, and portable devices. Its fast recharge and expandable design make it the go-to power solution for professionals demanding reliability and efficiency.

## Description

desertcart.com: NERMAK 12V 18Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power, UPS, Lighting, Marine, Scooters, Fish Finder and More, Built-in 20A BMS : Automotive

Review: Great cost for an effective replacement. - 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.
Review: Update - failed within 1 day - 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.

## Features

- 【Superior Performance】: Lithium iron phosphate battery has high energy density, Long cycle life, Good safety performance, No memory effect, etc. NERMAK LiFePO4 battery has built-in BMS protection to prevent overcharge, Over-discharge, Over-current and short circuit, and excessive low self-discharge rate ensuring up to 1-year maintenance-free storage.
- 【Long life & light weight】: 2000+ cycles of lithium-ion batteries are no problem, while traditional lead-acid batteries only have 200-500 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 5.1 pounds, which is only 1/3 of the weight of a lead-acid battery.
- 【Widely Uses】: Widely uses in most areas such as: UPS backup, Lighting (LED strip etc), Ham Radio portable, RV/outdoor camping, Marine, Fish finder, Backup power, Tool trailer, Backup power supply, Off-Grid applications, Solar/Wind power and more...
- 【Expansion and Recharge】Can be connected in series or parallel, in series, Up to 4 identical batteries can be connected，Quick charge by 12A , and heavy-duty output discharge up to 20A continuous and 3C Pulse.
- 【Warm Note】: 1* Replacement lithium ion battery，12 months warranty, If you have any question for our product, Contact us: click the "Ask a question" on our storefront or in "YOUR ORDER" options click the "contact seller" (please use LiFePo4 special charger, with fully automatic SLA charger may not be fully charged)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09H353H6M |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Best Sellers Rank | #10,057 in Health & Household ( See Top 100 in Health & Household ) #7 in 12V Batteries |
| Customer Reviews | 4.3 4.3 out of 5 stars (2,981) |
| Date First Available | November 13, 2021 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.97 pounds |
| Item model number | 12V18A |
| Manufacturer | NERMAK |
| Product Dimensions | 7.16 x 3.03 x 6.69 inches |

## Product Details

- **Battery Capacity:** 18 Amp Hours
- **Battery Cell Composition:** Lithium-Phosphate
- **Brand:** NERMAK
- **Item Weight:** 2.97 Pounds
- **Manufacturer:** NERMAK
- **Size:** 12V 18Ah
- **Voltage:** 12.8 Volts

## Images

![12V 18Ah - Image 1](https://m.media-amazon.com/images/I/612CxDI2Z+L.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great cost for an effective replacement.
*by D***S on August 14, 2025*

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.

### ⭐⭐⭐⭐⭐ Update - failed within 1 day
*by R***N on October 7, 2024*

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.

### ⭐⭐⭐⭐⭐ Wonderful Upgrade Over Gelpack Power
*by W***K on January 26, 2026*

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)

## Frequently Bought Together

- NERMAK 12V 18Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power, UPS, Lighting, Marine, Scooters, Fish Finder and More, Built-in 20A BMS
- ULTRAPOWER 4-Amp 14.6 Volt LiFePO4 Battery Charger,12.8 Volt LiPO Lithium Battery Charger,Smart Charger Maintainer for Cars,Motocycles,Golf Carts,UAV,Fishing Boat and Deep Cycle Batteries.

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-03-01*