---
product_id: 329093262
title: "ECI Power 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS | Perfect for RV, Solar, Marine, Overland, Off-Grid Applications"
brand: "eci power"
price: "VT47400"
currency: VUV
in_stock: true
reviews_count: 8
url: https://www.desertcart.vu/products/329093262-eci-power-12v-20ah-lithium-lifepo4-deep-cycle-rechargeable-battery
store_origin: VU
region: Vanuatu
---

# Up to 7000 deep cycles lifespan 20Ah high-capacity power Built-in advanced BMS protection ECI Power 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS | Perfect for RV, Solar, Marine, Overland, Off-Grid Applications

**Brand:** eci power
**Price:** VT47400
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your passion, not just your devices.

## Quick Answers

- **What is this?** ECI Power 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS | Perfect for RV, Solar, Marine, Overland, Off-Grid Applications by eci power
- **How much does it cost?** VT47400 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/329093262-eci-power-12v-20ah-lithium-lifepo4-deep-cycle-rechargeable-battery)

## Best For

- eci power enthusiasts

## Why This Product

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

## Key Features

- • **Cycle Like a Pro:** Up to 7000 life cycles at 50% depth of discharge means your battery outlasts the competition.
- • **Expandable Power Play:** Seamlessly connect up to 4 batteries in series or parallel for customized voltage and capacity.
- • **Maintenance-Free Freedom:** Low self-discharge and built-in low-temp cutoff ensure your battery is ready when you are, even after months.
- • **Smart Safety, Zero Worries:** Integrated Battery Management System shields against overcharge, overheating, and short circuits.
- • **Enduring Energy for Every Adventure:** 20Ah capacity fuels your RV, solar, marine, or off-grid lifestyle with reliable power.

## Overview

The ECI Power 12V 20Ah LiFePO4 deep cycle battery delivers robust, long-lasting energy with up to 7000 cycles and a 10-year lifespan. Featuring UL1642 Grade-A cells and a built-in Battery Management System, it offers superior safety and performance for RVs, solar setups, marine, and off-grid applications. Lightweight and expandable, it’s engineered for professionals who demand reliable, maintenance-free power solutions.

## Description

Full description not available

## Features

- ECI Power: A brand for everyone with the goal of providing an open avenue for all to know that safe lithium power should not be cost-prohibitive nor outside the scope of your project.
- Unmatched Technology: The ECI Power LiFePO4 battery is designed to meet the needs of modern energy applications while exceeding performance comparable to even the most expensive batteries on the market. Also supports expansion up to 4 batteries sequenced in either series at 48V 20Ah, or in parallel at 12V 80Ah.
- Proven Quality: The battery utilizes UL1642 listed LiFePO4 Grade-A cells and is backed by our industry-leading engineering and after-sale teams covering North America and beyond since 1987.
- Economical: At a phenomenal price point, the battery is rigorously lab-tested and guaranteed to meet a minimum 3500 cycles at 80% DOD, providing high-performance longevity with a maximum of 7000 cycles at 50% DOD.
- Complete Protection: The lithium battery’s unique built-in Battery Management System (BMS) protects it from overcharge, deep discharge, overloading, overheating and short circuit, and excessive low self-discharge rate ensuring up to 1 year maintenance-free storage. Built-in low-temp cut off prevents charging under 23 °F (-5 °C).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | ECI Power |
| Size | 20 AH |
| Battery Cell Composition | Lithium Ion |
| Number Of Cells | 4 |
| Terminal | Marine Terminal |
| Battery Capacity | 20 Amp Hours |
| Manufacturer | ExpertPower |
| UPC | 840140942965 |
| Model | lifepo4 |
| Item Weight | 5.04 pounds |
| Product Dimensions | 7.1 x 3 x 6.6 inches |
| Item model number | ECI1220 |
| Batteries | 1 12V batteries required. |
| Manufacturer Part Number | ECI1220 |
| Amperage | 20 Amps |

## Product Details

- **Brand:** ECI Power
- **Vehicle Service Type:** Trailer
- **Size:** 20 AH
- **Voltage:** 12 Volts
- **Battery Cell Composition:** Lithium Ion
- **Number Of Cells:** 4
- **Terminal:** Marine Terminal
- **Battery Capacity:** 20 Amp Hours
- **Manufacturer:** ExpertPower
- **UPC:** 840140942965

## Images

![ECI Power 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS | Perfect for RV, Solar, Marine, Overland, Off-Grid Applications - Image 1](https://m.media-amazon.com/images/I/61-38AmE+uL.jpg)

## Available Options

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

## Questions & Answers

**Q: Will the bms allow for 3 batteries connected in series to get 36v without cutting out?**
A: No, the battery is limited to 2 in series

562-630-3002
support@expertpower.us

**Q: What is the best way to cover and protect the terminals?**
A: There are no terminals in the traditional sense.  They are threaded inserts that are lower than the level of the battery top.  The only exposed part is the screw heads that fasten your cable connectors to the battery.  If you put the battery in some kind of battery box, there should be no issues.

**Q: Can this be used as a replacement for the 12 volt battery (for starting and accessories) on a first generation nissan leaf?**
A: Yes it can, it only takes 185 watts of power to switch on the main pack and it take over the 12v bus. There are decades of documentation of many people using LiFePO4 12v 20ah batteries to do this on many generations of Leaf. This battery is rated nominal for 256 watts, so it can handle it. The only issue is the wiring adaption, you'll need someone knowledgeable to do it correctly. If you live in an extreme cold area, you might not want to do this though, that's the caution.

**Q: How can i tell when my eci power 5ah is charged?  the charger i bought doesn't ever get to the fully charged status light. will batt voltage indicate?**
A: This is a common issue with a Lithium Foe charger unless it was specifically designed for that battery with an indicator. There it would be best to charge it only when supervised and take reading with a volt meter. Typically they read 14.7 fully charged otherwise one can purchased their designed charger at a much higher expense.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Lightweight and holds a full charge for quite a long time
*by I***N on July 23, 2022*

I was quite surprised at how light in weight these batteries are compared to the deep cycle batteries I was using in my boat. I'll be buying two more for my smaller 12' V-bottom boat. The smaller boat I have to really watch my weight as I load the boat and when I'm on lakes where I can only use an electric motor, I've had to lug a heavy deep cycle battery, These batteries were so light I carried 2 of them down at a time to my pontoon boat. I use one for the trolling motor and one for the anchor winch. I've been using them all summer so far and it's not died down as a regular deep cell battery would. I even had a problem one night with the gas engine not starting and I had to use the trolling motor to get the 24' pontoon boat back to dock. I would estimate that I've used the trolling battery for about 18 hours so far and it still powers my trolling motor as it did when I had it fully charged. I did read that I could hook the two together in either series or parallel, I suggest reading up online on the advantages and disadvantages of both hookups. Next summer I think I'll buy 2 more and hook 2 in parallel to each of my devices and see if I can make it through the summer. I also thought about getting a solar panel to charge the batteries, that way I wouldn't have to worry about taking them off the boat till it's time to store them for the winter. I'll update you on how they handle solar charging once I do that. The only drawback that I found was that you have to use electrical terminals to make the connection as the terminal posts are too small for conventional battery cables to hook to.

### ⭐⭐⭐⭐⭐ Good value.
*by S***K on July 15, 2025*

Works great. Used it to replace a lead acid version in my Chamberlain garage door opener. I did have to trim one edge of the negative terminal. The negative spade on the chamberlain is a smaller female spade terminal. I used a straight cut metal shear to do that. Easy peasey.

### ⭐⭐⭐⭐⭐ Works for Honeywell 6150 RF
*by J***. on April 24, 2023*

Have a builder installed alarm system Honeywell 6150 RF. After 5 years, the panel shows BAT and gave alarm almost every day. Finally found this replacement battery. The size and voltage match with original, but capacity is 5Ah which is bigger than original 4Ah. The metal connector is a bit wider. Cut to fit. After changing the battery, get into walk-test mode: Code + [5] + [0]. Wait for 5 minutes. Code + [1] OFF. The low battery message is cleared. No more alarm on in the days afterwards. Hope it can last longer than SLA (Sealed Lead Acid) version.

## Frequently Bought Together

- ECI Power 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS | Perfect for RV, Solar, Marine, Overland, Off-Grid Applications
- ExpertPower 12.8V 5A Smart Charger for Lithium LiFePO4 Deep Cycle Rechargeable Batteries

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.vu/products/329093262-eci-power-12v-20ah-lithium-lifepo4-deep-cycle-rechargeable-battery](https://www.desertcart.vu/products/329093262-eci-power-12v-20ah-lithium-lifepo4-deep-cycle-rechargeable-battery)

---

*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-26*