---
product_id: 144386614
title: "LiFePO4 12V 40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid Applications"
brand: "ruixu"
price: "$261.90"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/144386614-lifepo4-12v-40ah-lithium-iron-phosphate-battery-pack-light-weight
store_origin: US
region: United States of America
---

# 40Ah high capacity 2000+ charge cycles lifespan 70-80% lighter weight LiFePO4 12V 40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid Applications

**Brand:** ruixu
**Price:** $261.90
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up smarter, lighter, and longer — don’t get left in the dark!

## Quick Answers

- **What is this?** LiFePO4 12V 40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid Applications by ruixu
- **How much does it cost?** $261.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/144386614-lifepo4-12v-40ah-lithium-iron-phosphate-battery-pack-light-weight)

## Best For

- ruixu enthusiasts

## Why This Product

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

## Key Features

- • **Smart & Safe:** Integrated Battery Management System (BMS) ensures optimal protection and longevity.
- • **Power That Lasts:** Up to 5x longer life than traditional lead acid batteries with 2000+ charge cycles for relentless performance.
- • **Featherlight Energy:** 70-80% lighter than sealed lead acid batteries, making installation and transport effortless.
- • **Plug & Play Upgrade:** Direct 12V lead acid replacement compatible with RVs, solar setups, marine, and off-grid systems.
- • **Consistent High Output:** Delivers a steady 40A continuous current with 75% higher effective capacity for demanding applications.

## Overview

The RUIXU LiFePO4 12V 40Ah battery is a cutting-edge lithium iron phosphate pack designed as a direct, lightweight replacement for lead acid batteries. Featuring a robust 40Ah capacity, integrated BMS protection, and a lifespan of up to 2000 charge cycles, it offers 75% more effective capacity and weighs 70-80% less than traditional sealed lead acid batteries. Ideal for RVs, solar, marine, and off-grid applications, this battery delivers reliable, continuous 40A output with a 3-year warranty, ensuring long-term, hassle-free power.

## Description

RUIXU LiFePO4 12V40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid

## Features

- 12 volt Drop in Lead Acid Replacement | 40AH | Size:7.8¡å*6.5¡å*6.7¡å | 23lbs
- 40 amp continuous output | 3 years warranty | Only can do in parallel to 12V80Ah,12V120Ah, 12V120Ah¡­.
- 70-80% lighter than equivalent Sealed Lead Acid (SLA) batteries;5 times longer life (2000 charge cycles vs. 400 on SLA) | 75% higher effective capacity than SLA batteries| Includes Battery Management System (BMS) protection circuit.
- 3000-5000 cycles - Acceptable Charging voltages 14.4 to 14.6 volts
- WIDE RANGE OF APPLICATIONS- RUIXU Lithium Iron Phosphate Battery is perfect for deep-cycle applications including electric vehicles, solar/wind energy system, UPS battery backup, telecommunication systems, medical equipment, and more.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07VBVX6NK |
| Battery Type | Lead Acid |
| Battery cell composition | Lead Acid |
| Brand | RUIXU |
| Brand Name | RUIXU |
| Compatible with Vehicle Type | RV |
| Manufacturer | RUIXU |
| Manufacturer Part Number | RX-LFP-12-40 |
| Size | 12V 40AH |
| Terminal | Marine Terminal |
| UPC | 778862695183 |
| Vehicle service type | RV |
| Voltage | 12 Volts |

## Product Details

- **Brand:** RUIXU
- **Size:** 12V 40AH
- **Battery cell composition:** Lead Acid
- **Terminal:** Marine Terminal
- **Manufacturer:** RUIXU
- **UPC:** 778862695183

## Images

![LiFePO4 12V 40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid Applications - Image 1](https://m.media-amazon.com/images/I/615yIJES06L.jpg)
![LiFePO4 12V 40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid Applications - Image 2](https://m.media-amazon.com/images/I/61TUbkxy5+L.jpg)
![LiFePO4 12V 40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid Applications - Image 3](https://m.media-amazon.com/images/I/71U0S3KzIhL.jpg)
![LiFePO4 12V 40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid Applications - Image 4](https://m.media-amazon.com/images/I/71UHVp3yhzL.jpg)
![LiFePO4 12V 40Ah Lithium Iron Phosphate Battery Pack Light Weight LiFePO4 Complete Battery (BMS Included),Lead Acid Battery Replacement RV, Solar, Marine, and Off-Grid Applications - Image 5](https://m.media-amazon.com/images/I/71hwO2wTRpL.jpg)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-04-26*