Search  for anything...
FLEX

FLEX 24V 8.0Ah Lithium-Ion Battery - FX0221-1

  • Based on 80 reviews
Condition: New
Checking for the best price...
$189.00 Why this price?
Save $30.99 was $219.99

Buy Now, Pay Later

As low as $31.50 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Only 2 left in stock, order soon!
Fulfilled by Mel Sale
Arrives Aug 31 – Sep 5
Order within 23 hours and 51 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Size: 8.0Ah


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
  • FASTER CHARGING - Up to 50% faster charging - 160W Fast Charger Charge Time: 90 Mins, 280W Rapid Charger Charge Time: 50 Mins
  • BATTERY LOCK SYSTEM - Durable design prevents accidental disconnection during recharging

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.

Number of Batteries: 1 Lithium Ion batteries required. (included)


Brand: FLEX


Battery Cell Composition: Lithium Ion


Battery Capacity: 8 Amp Hours


Unit Count: 1.0 Count


Number of Batteries: 1 Lithium Ion batteries required. (included)


Brand: FLEX


Model Number: FX0221-1


Model Name: 24V 8.0Ah Lithium Battery


Global Trade Identification Number: 22


UPC: 840163200028


Manufacturer: Nanjing Chervon Industry Co., Ltd.


Built-In Media: 8.0Ah Lithium-Ion Battery


Warranty Description: Limited Lifetime Warranty with Registration


Item Type Name: 8.0Ah Lithium-Ion Battery


Battery Capacity: 8 Amp Hours


Voltage: 24 Volts


Amperage: 8 Amps


Unit Count: 1.0 Count


Battery Weight: 3 Pounds


Item Dimensions: 5.6 x 3.5 x 2.8 inches


Battery Cell Type: Lithium Ion


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 31 – Sep 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Perfect size
Size: 8.0Ah
Not too heavy, works like I expected and lasts a good long while
Reviewed in the United States on February 6, 2026 by Dan Tomlinson
    • Awesome battery
Size: 8.0Ah
Awesome battery, I want to purchase more!!! I am building my own home. Dang good batteries with a very long charge! They last all day long.
Reviewed in the United States on January 8, 2026 by Amazon Customer
    • Battery works great
Size: 8.0Ah
Good quality battery
Reviewed in the United States on January 4, 2026 by Tim
    • Batteries still leaking
Size: 8.0Ah
Just recently ordered a battery and it looks like a fresh item straight from Flex but it showed up leaking in the package - Will update review once I hear from Flex but this was supposedly fixed from their Gen1 series - not a good look when these batteries cost more than the competition **EDIT** - Flex fully took care of this and sent a replacement battery quite rapidly - no frustrations - just expect you might get old stock and have to do the same, as such I am changing this to a 4 out of 5 due to their fantastic customer service ... show more
Reviewed in the United States on January 11, 2026 by IT Equine
    • Good deal
Size: 8.0Ah
Very well priced, works great on my wet or dry vacuum. Lasts over an hour of continues. Good deal for me.
Reviewed in the United States on August 28, 2025 by MS
    • Battery leakage
Size: 8.0Ah
There was black gunk running out of the battery and was inside the package as well. The battery had the same issue the batteries that came with the Flex tools. I have flex tools and no battery that will function. I have since changed tool brands that seem to know how to make a battery. The tools were great, the battery had a lot to be desired. ... show more
Reviewed in the United States on October 21, 2025 by Charlie
    • its what i ordered
Size: 8.0Ah
have not used yet but seem good
Reviewed in the United States on February 10, 2026 by leland ormsby
    • good battery
Size: 8.0Ah
battery strong but little heavy, best used with hi power tools
Reviewed in the United States on November 6, 2025 by good quality part

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...