---
product_id: 342581950
title: "ECI Power 12V 5Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS"
brand: "eci power"
price: "€ 79.48"
currency: EUR
in_stock: true
reviews_count: 10
category: "Eci Power"
url: https://www.desertcart.hr/products/342581950-eci-power-12v-5ah-lithium-lifepo4-deep-cycle-rechargeable-battery
store_origin: HR
region: Croatia
---

# 5Ah high capacity 2000-5000 life cycles Built-in BMS protection ECI Power 12V 5Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS

**Brand:** eci power
**Price:** € 79.48
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** ECI Power 12V 5Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS by eci power
- **How much does it cost?** € 79.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/342581950-eci-power-12v-5ah-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

- • **Safe & Smart:** Integrated Battery Management System guards against overcharge, deep discharge, overheating, and short circuits for worry-free use.
- • **Enduring Powerhouse:** Up to 5000 cycles at 50% depth of discharge means your projects stay powered longer without costly replacements.
- • **Lightweight & Compact:** At just 1.5 lbs and sleek dimensions, it’s the perfect power solution that won’t weigh you down or clutter your workspace.
- • **Expandable Flexibility:** Supports up to 4 batteries in series or parallel for scalable 12V or 48V setups—customize your power like a pro.
- • **Cost-Effective Innovation:** Premium UL1642 Grade-A LiFePO4 cells deliver top-tier performance at a price that keeps your budget happy.

## Overview

The ECI Power 12V 5Ah LiFePO4 battery combines cutting-edge lithium technology with robust safety features and exceptional longevity, offering up to 5000 charge cycles and built-in smart protection. Lightweight and compact, it’s designed for versatile energy applications with scalable configurations, making premium, maintenance-free power accessible and affordable for modern professionals.

## Description

desertcart.com: ECI Power 12V 5Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS : Automotive

Review: Lightweight and holds a full charge for quite a long time - 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.
Review: Great replacement for older style batteries - Excellent direct fit replacement for the old NiCd battery in my elliptical and maintained full functionality. No issues recharging and gives at least the same capacity of the original at a fraction of the weight. Hard to beat for the cost and stability of charge over time.

## 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 5Ah, or in parallel at 12V 20Ah.
- 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 2000 cycles at 80% DOD, providing high-performance longevity with a maximum of 5000 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 |
|---------------|-------|
| ASIN | B0973L9XMY |
| Amperage | 5 Amps |
| Batteries | 1 Product Specific batteries required. |
| Best Sellers Rank | #190,883 in Health & Household ( See Top 100 in Health & Household ) #473 in 12V Batteries |
| Brand | ECI Power |
| Customer Reviews | 4.1 4.1 out of 5 stars (565) |
| Date First Available | June 11, 2021 |
| Item Weight | 1.5 pounds |
| Item model number | ECI125 |
| Manufacturer | ExpertPower |
| Manufacturer Part Number | ECI124 |
| Model | lifepo4 |
| Product Dimensions | 0.79 x 2.36 x 3.54 inches |

## Product Details

- **Battery Capacity:** 5 Milliamp Hours
- **Battery Cell Composition:** Lithium Ion
- **Brand:** ECI Power
- **Item Weight:** 1.5 Pounds
- **Manufacturer:** ExpertPower
- **Number Of Cells:** 4
- **Size:** 5 AH
- **UPC:** 840140942941
- **Vehicle Service Type:** Passenger Car
- **Voltage:** 12 Volts

## Images

![ECI Power 12V 5Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS - Image 1](https://m.media-amazon.com/images/I/61fEM5qFPQL.jpg)

## 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.

### ⭐⭐⭐⭐⭐ Great replacement for older style batteries
*by R***L on October 26, 2025*

Excellent direct fit replacement for the old NiCd battery in my elliptical and maintained full functionality. No issues recharging and gives at least the same capacity of the original at a fraction of the weight. Hard to beat for the cost and stability of charge over time.

### ⭐ Got the first battery , completely dead
*by J***Y on January 12, 2026*

Got the first battery , completely dead, even tried to charge with Lithum charger, still no good, requested a return and was sent one just like the first, back to requested a return and they gave me my money back.

## Frequently Bought Together

- ECI Power 12V 5Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2000-5000 Life Cycles & 10-Year Lifetime | Built-in BMS
- ExpertPower 12V 1A Smart Charger for Lithium LiFePO4 Deep Cycle Rechargeable Batteries | DC 5521 Male & Alligator Clips | Kids Ride on Toy Car | Best Choice, Wrangler SUV, Dynacraft

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-24*