---
product_id: 609538283
title: "FLEX 24V 5.0Ah Lithium-Ion Battery - FX0121-1"
brand: "flex"
price: "NT$11864"
currency: TWD
in_stock: true
reviews_count: 8
category: "Flex"
url: https://www.desertcart.tw/products/609538283-flex-24v-5-0ah-lithium-ion-battery-fx0121-1
store_origin: TW
region: Taiwan
---

# 24V Lithium Power Boost Fast Charge in 30-60 Minutes THERMA-TECH Cooling Extends Runtime FLEX 24V 5.0Ah Lithium-Ion Battery - FX0121-1

**Brand:** flex
**Price:** NT$11864
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your projects with FLEX’s smartest, coolest battery yet!

## Quick Answers

- **What is this?** FLEX 24V 5.0Ah Lithium-Ion Battery - FX0121-1 by flex
- **How much does it cost?** NT$11864 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/609538283-flex-24v-5-0ah-lithium-ion-battery-fx0121-1)

## Best For

- flex enthusiasts

## Why This Product

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

## Key Features

- • **Stay In The Know:** Patented dual-sided fuel gauge lets you check charge from multiple angles instantly.
- • **Built Tough for Any Job:** Shock-resistant, dust and water sealed design keeps you going in harsh conditions.
- • **Power That Lasts Longer:** THERMA-TECH cooling tech reduces heat for 25% more runtime—work uninterrupted.
- • **Smart Energy Management:** POWER IQ optimizes battery cells to prevent overload and maximize output.
- • **Rapid Recharge, Zero Downtime:** 160W charger powers up in 60 mins; 280W rapid charger cuts it to 30 mins.

## Overview

The FLEX 24V 5.0Ah Lithium-Ion Battery (FX0121-1) delivers industry-leading power with advanced THERMA-TECH cooling for 25% longer runtime, intelligent POWER IQ management for overload protection, and a rugged, water/dust-resistant design. Compatible across all FLEX 24V tools and chargers, it features a patented dual-sided fuel gauge and fast charging options (30-60 mins), backed by a 5-year limited warranty with registration.

## Description

The FLEX 24V Lithium battery platform brings power output to the next level. It combines intelligent battery management with THERMA-TECH™ cooling technology to deliver a driving force that's up to 20% higher than anything you've already seen out there.

Review: Great Brand! - Works great.
Review: Works great - Charges fast great OEM quality!

## Features

- THE FLEX ADVANTAGE - 24V Lithium Technology
- THERMA-TECH HEAT MANAGEMENT - Innovative cooling system minimizes heat for 25% longer runtime
- POWER IQ - Intelligent power management monitors and optimizes the cells for overload protection and higher power
- DROP, DUST, AND WATER RESISTANT - Engineered with a shock-resistant design and sealed electronics
- PATENTED DUAL-SIDED FUEL GAUGE - Quickly view battery charge from multiple angles
- FAST CHARGING - 160W Fast Charger Charge Time: 60 Mins, 280W Rapid Charger Charge Time: 30 Mins
- BATTERY LOCK SYSTEM - Durable design prevents accidental disconnection during recharging
- FLEX 24V CROSS-COMPATIBILITY - Compatible with all FLEX 24V batteries, chargers, and tools
- FLEX 5-YEAR LIMITED WARRANTY - Register your new FLEX tool, battery, or charger within 30 days of purchase to receive a 5-year limited warranty; 3-year limited warranty without registration

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CV7SVNZZ |
| Antenna Location | Flex 24V tools |
| Battery Capacity | 5 Amp Hours |
| Battery Cell Composition | Lithium Ion |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 2.1 Pounds |
| Best Sellers Rank | #81,667 in Automotive ( See Top 100 in Automotive ) #278 in Automotive Replacement Batteries |
| Brand | FLEX |
| Built-In Media | Battery Only |
| Customer Reviews | 4.5 out of 5 stars 86 Reviews |
| Global Trade Identification Number | 00840163200011, 20840163200015 |
| Item Dimensions | 5.2 x 3.5 x 2.1 inches |
| Item Height | 2.1 inches |
| Item Type Name | TOOLS |
| Manufacturer | FLEX |
| Model Name | 24V 5.0Ah Lithium Battery |
| Model Number | FX0121-1 |
| Number of Batteries | 1 Nonstandard Battery batteries required. (included) |
| Recommended Uses For Product | Flex 24V tools |
| Reusability | Rechargeable |
| UPC | 840163200011 |
| Unit Count | 1.0 Count |
| Voltage | 24 Volts |
| Warranty Description | Limited Lifetime Warranty with Registration |

## Product Details

- **Number of Batteries:** 1 Nonstandard Battery batteries required. (included)
- **Brand:** FLEX
- **Battery Cell Composition:** Lithium Ion
- **Battery Capacity:** 5 Amp Hours
- **Recommended Uses For Product:** Flex 24V tools

## Images

![FLEX 24V 5.0Ah Lithium-Ion Battery - FX0121-1 - Image 1](https://m.media-amazon.com/images/I/714bQxslyGL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Brand!
*by B***N on October 19, 2025*

Works great.

### ⭐⭐⭐⭐⭐ Works great
*by V***G on May 30, 2025*

Charges fast great OEM quality!

### ⭐⭐⭐⭐⭐ Exactly as advertise
*by K***D on June 15, 2025*

Flex is awesome this is exactly what's advertised will definitely be purchasing more in the future

## Frequently Bought Together

- FLEX 24V 5.0Ah Lithium-Ion Battery - FX0121-1
- FLEX 24V Brushless Cordless 5-Inch 10,000 RPM Variable Speed Paddle Switch Angle Grinder Tool Only, Battery and Charger Not Included - FX3171A-Z
- FLEX 24V Brushless 1.6 Gallon Wet/Dry Tool Only Vacuum Cleaner, Grey

---

## 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.tw/products/609538283-flex-24v-5-0ah-lithium-ion-battery-fx0121-1](https://www.desertcart.tw/products/609538283-flex-24v-5-0ah-lithium-ion-battery-fx0121-1)

---

*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-01-22*