---
product_id: 739556998
title: "12V 8Ah Lithium Battery,4000+Cycles 12V LiFePO4 Battery Built-in BMS 5A,Deep Cycle Lithium Iron Phosphate Rechargeable Batteries for Small UPS,Power Wheels,Fish Finder,Ride-on Toy,Camping"
brand: "eiiev"
price: "$61.11"
currency: USD
in_stock: true
reviews_count: 8
category: "Eiiev"
url: https://www.desertcart.us/products/739556998-12v-8ah-lithium-battery-4000-cycles-12v-lifepo4-battery-built
store_origin: US
region: United States of America
---

# 100% depth of discharge 4000+ cycles lifespan Built-in 6-way BMS protection 12V 8Ah Lithium Battery,4000+Cycles 12V LiFePO4 Battery Built-in BMS 5A,Deep Cycle Lithium Iron Phosphate Rechargeable Batteries for Small UPS,Power Wheels,Fish Finder,Ride-on Toy,Camping

**Brand:** eiiev
**Price:** $61.11
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your hustle with endurance and safety—never settle for less!

## Quick Answers

- **What is this?** 12V 8Ah Lithium Battery,4000+Cycles 12V LiFePO4 Battery Built-in BMS 5A,Deep Cycle Lithium Iron Phosphate Rechargeable Batteries for Small UPS,Power Wheels,Fish Finder,Ride-on Toy,Camping by eiiev
- **How much does it cost?** $61.11 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/739556998-12v-8ah-lithium-battery-4000-cycles-12v-lifepo4-battery-built)

## Best For

- eiiev enthusiasts

## Why This Product

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

## Key Features

- • **Safety First, Always:** Integrated BMS shields against overcharge, overdischarge, short circuits, and more—peace of mind in every charge.
- • **Lightweight & Portable:** At just 2.2 lbs and compact size, it’s the perfect companion for on-the-go professionals and outdoor enthusiasts.
- • **Endurance That Outlasts:** Over 4,000 deep cycles means fewer replacements and more uptime—beat the lead-acid lag.
- • **Modular Power Expansion:** Wire up to 16 batteries in series or parallel for a custom 12V to 48V powerhouse—scale your energy on demand.
- • **Full Power, No Compromise:** 100% discharge capability unlocks maximum runtime—get every last drop of energy.

## Overview

The Eiiev 12V 8Ah LiFePO4 battery delivers industry-leading longevity with 4000+ charge cycles and 100% depth of discharge, supported by a robust built-in BMS for comprehensive safety. Lightweight and compact, it’s designed for versatile applications from UPS systems to outdoor gear, with flexible wiring options for scalable power solutions.

## Description

Buy Eiiev 12V 8Ah Lithium Battery,4000+Cycles 12V LiFePO4 Battery Built-in BMS 5A,Deep Cycle Lithium Iron Phosphate Rechargeable Batteries for Small UPS,Power Wheels,Fish Finder,Ride-on Toy,Camping: 12V - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Built to last an excellent upgrade that’s worth. - I’m extremely impressed with this 12V LiFePO4 battery. It’s lightweight, compact, and delivers reliable power far beyond what my old lead acid batteries could handle. The long cycle life and built in safety protections give real peace of mind, Easy to recharge and dependable.
Review: Battery voltage unstable, do not buy this brand. - This is NOT a good battery. I have used it 5 or 6 times now, and the voltage will drop unexpectedly at random times below 9 volts. I haven't put a meter on it when it drops, but my ham radio transceiver shows a low voltage, and a light comes on when voltage drops below 9 volts, and the signal sent from the transceiver is distorted. A minute or 2 later voltage is ok again, then it does the same thing again randomly. This is after having the battery fully charged and only using it under load for a short period of time. I have owned other brands of these type batteries that have lasted hundreds of charging cycles with no problems, but this one is not good at all. Don't waste your money on it!

## Features

- 【Longer Lifetime, Lower Costs】 Eiiev 12V 8Ah LiFePO4 batteries have a lifespan of over 4,000 cycles, which is much longer than the 300–500 cycles of lead-acid batteries. Unlike SLA batteries, which can only discharge by 40–60%, our lithium batteries can discharge by 100%, which extends the time between replacements. While LiFePO4 batteries may have a slightly higher initial cost than lead-acid alternatives, their extended lifespan and superior cycle performance lead to a lower cost of ownership.
- 【High Safety, Built-in BMS Protection】12 volt fish finder battery feature a built-in BMS with six safeguards: protection against high temperatures, overcharging, overdischarging, overcurrent, short circuits and automatic balancing. Coupled with salt fog and dust resistance capabilities, they are durable in various conditions. Furthermore, as they are free from heavy and rare metals, our LiFePO4 batteries are Earth-friendly.
- 【Flexible Expansion】Our lithium batteries support wiring in series to create a 24V/36V/48V 8Ah battery bank system. Additionally, they can be wired in parallel to build a 12V 16Ah/24Ah/32Ah system. Furthermore, you can connect up to 16 batteries in both series and parallel to construct a robust battery bank system with a total capacity of 1638Wh. Kindly note that ensure all batteries are fully charged individually before connecting in series.Battery BMS is 5A so single battery maximum withstandable power is 73w.
- 【Lightweigh,Compact & Portable】 This 12V 8Ah backup power source measures 5.9 x 2.6 x 3.7 inches and weighs only 2.2 pounds, making it much lighter and easier to carry and install than batteries of equal size and capacity.This makes it very popular in portable devices and outdoor power supply.
- 【Wide Applications】Small 12V lithium battery is the perfect replacement for your less durable Lead Acid batteries. It is suitable for a variety of applications, including fish finders, Kayak,power wheels,camping, backup power,UPS power systems, solar gate openers, emergency lighting (LED strip etc), home security systems, ride-on toys, and more (Not a starter battery).
- 【Easy to recharge and maintain】 The new 12v rechargeable battery adapt a 14.6V 4A or 6A charger with pulse function to charge the battery. (Auto charger,standard lead-acid chargers, non-pulse lithium chargers, or automotive chargers is not supported)
- 【After-Sales Service】Eiiev provide professional technical support and online customer service with fast response within 24 hours. Eiiev support team is always here for you.
- NOTE: DO NOT connect batteries of different brands or types in series or parallel. (Mixing batteries from different brands may cause fire.)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0F7X6WDYY |
| Automotive Fit Type | Universal Fit |
| Batteries | 1 12V batteries required. |
| Battery Capacity | 8 Amp Hours |
| Best Sellers Rank | #56,556 in Health & Household ( See Top 100 in Health & Household ) #96 in 12V Batteries |
| Brand | Eiiev |
| Customer Reviews | 3.4 3.4 out of 5 stars (102) |
| Date First Available | May 8, 2025 |
| Item Weight | 2.2 pounds |
| Item model number | 12V Battery |
| Manufacturer | Eiiev |
| Manufacturer Part Number | 12V Battery |
| Model | 12V Battery |
| Product Dimensions | 2.58"D x 5.96"W x 3.92"H |
| Terminal | F2 Terminal |
| UPC | 762849893402 |

## Product Details

- **Automotive Fit Type:** Universal Fit
- **Battery Capacity:** 8 Amp Hours
- **Battery Cell Composition:** Lithium Ion
- **Brand:** Eiiev
- **Item Weight:** 2.2 Pounds
- **Manufacturer:** Eiiev
- **Product Dimensions:** 2.58"D x 5.96"W x 3.92"H
- **Terminal:** F2 Terminal
- **Vehicle Service Type:** children's toy cars, fish detectors, alarm system, emergency response system, emergency lighting
- **Voltage:** 12.8 Volts

## Images

![12V 8Ah Lithium Battery,4000+Cycles 12V LiFePO4 Battery Built-in BMS 5A,Deep Cycle Lithium Iron Phosphate Rechargeable Batteries for Small UPS,Power Wheels,Fish Finder,Ride-on Toy,Camping - Image 1](https://m.media-amazon.com/images/I/71IfwLQPFNL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Built to last an excellent upgrade that’s worth.
*by J***O on February 6, 2026*

I’m extremely impressed with this 12V LiFePO4 battery. It’s lightweight, compact, and delivers reliable power far beyond what my old lead acid batteries could handle. The long cycle life and built in safety protections give real peace of mind, Easy to recharge and dependable.

### ⭐ Battery voltage unstable, do not buy this brand.
*by S***. on August 30, 2025*

This is NOT a good battery. I have used it 5 or 6 times now, and the voltage will drop unexpectedly at random times below 9 volts. I haven't put a meter on it when it drops, but my ham radio transceiver shows a low voltage, and a light comes on when voltage drops below 9 volts, and the signal sent from the transceiver is distorted. A minute or 2 later voltage is ok again, then it does the same thing again randomly. This is after having the battery fully charged and only using it under load for a short period of time. I have owned other brands of these type batteries that have lasted hundreds of charging cycles with no problems, but this one is not good at all. Don't waste your money on it!

### ⭐⭐⭐⭐⭐ Works Well For Small Underwater Fishing Camera!
*by M***Y on October 13, 2025*

Needed a battery to replace the old lead-acid battery for my underwater fishing camera system. This works awesome and is a lot more light weight and seems to have more capacity and battery life than the old lead acid battery.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-13*