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2PCS 24V 8.0Ah Battery for FLEX 24 Volt Replacement Lithium-Ion Battery 8000mAh US
2PCS 24V 8.0Ah Battery for FLEX 24 Volt Replacement Lithium-Ion Battery 8000mAh US
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2PCS 24V 8.0Ah Battery for FLEX — 8000mAh Lithium-Ion Replacement
Power every FLEX 24V tool with this 2-pack of high-capacity 8.0Ah (192Wh) replacement batteries. THERMA-TECH heat management, POWER IQ smart control, and professional-grade durability — always have a charged backup ready.
Product Overview
This 2-pack of 24V 8.0Ah batteries for FLEX keeps your cordless tools running through the longest job site days. Each battery delivers 24 volts of consistent output with 8.0 amp-hours (8000mAh) of capacity — totaling 192 watt-hours of energy per pack. That is over 3 times the runtime of the FLEX 2.5Ah battery and 60 percent more than the FLEX 5.0Ah.
Two advanced technologies power every cycle. THERMA-TECH Heat Management actively cools the cells during high-demand use, reducing heat-related efficiency loss and providing up to 25 percent longer runtime. POWER IQ Intelligent Management continuously monitors each cell, balancing discharge across the pack and protecting against overload, overheating, over-discharge, and short circuits.
The batteries are 100 percent cross-compatible with every FLEX 24V cordless tool and charger. They click directly into FLEX 24V drills, impact drivers, circular saws, reciprocating saws, angle grinders, blowers, string trimmers, work lights, and radios — no modification, no adapter. The professional-grade housing withstands impact, dust, and moisture, making these batteries dependable on any job site.
Technology & Compatibility Overview
This battery integrates two FLEX-platform technologies that work together to maximize runtime, protect cells, and extend overall battery life.
| Technology | What It Does |
|---|---|
| THERMA-TECH Heat Management | Actively dissipates heat during heavy use — delivers up to 25% longer runtime and prevents performance throttling from overheating |
| POWER IQ Smart Management | Monitors and balances each cell — provides overload protection, cell balancing, and intelligent charge/discharge control for extended cycle life |
| 24V Cross-Compatibility | 100% compatible with every FLEX 24V cordless tool and charger — clicks in with no adapter or modification |
Compatible FLEX 24V Tools
This battery works with every FLEX 24V cordless tool and charger. Below is a representative list of compatible tool categories and models.
Drilling & Fastening
- 1/2" Hammer Drill (FX1271T)
- 1/2" Drill Driver (FX1151)
- 1/4" Hex Impact Driver (FX1351, FX1371A)
- 1/2" High Torque Impact Wrench (FX1471)
Cutting & Grinding
- 7-1/4" Circular Saw (FX2141)
- Rear Handle Circular Saw (FX2141R)
- Reciprocating Saw (FX2271)
- Angle Grinder
Outdoor, Lighting & More
- Blower
- String Trimmer
- Work Light (FX5111)
- Job Site Radio
Key Features & Specifications
| Specification | Detail |
|---|---|
| Battery Type | Lithium-Ion (Li-ion) |
| Voltage | 24 Volts (V) |
| Capacity | 8.0Ah / 8000mAh — 192 Watt-hours (Wh) of total energy |
| Heat Management | THERMA-TECH active cooling — up to 25% longer runtime |
| Power Management | POWER IQ — per-cell monitoring, cell balancing, intelligent charge/discharge |
| Protections | Overload, overheat, over-discharge, short circuit |
| Condition | Brand New |
| Package Quantity | 2 Batteries (2-pack) |
| Compatibility | All FLEX 24V cordless tools and chargers — 100% cross-compatible |
| Construction | Impact-resistant housing with moisture protection — job site ready |
| Charge Time (160W Charger) | Approximately 90 minutes to full charge |
| Charge Time (280W Charger) | Approximately 50 minutes to full charge |
Why Choose This 2-Pack 8.0Ah FLEX Battery
Massive 8.0Ah Capacity (192Wh)
Over 3 times the runtime of a 2.5Ah pack and 60 percent more than a 5.0Ah. Power through high-demand tools like circular saws and rotary hammers without constant battery swaps.
THERMA-TECH Active Cooling
Heat is the enemy of lithium-ion performance. THERMA-TECH dissipates heat during heavy use, delivering up to 25 percent longer runtime and preventing the power fade that happens when standard batteries overheat.
POWER IQ Smart Management
Each cell is individually monitored and balanced. The system protects against overload during high-draw tasks, prevents deep discharge damage, and optimizes every charge cycle for maximum battery lifespan.
100% FLEX 24V Cross-Compatible
No adapters, no modifications. Clicks directly into every FLEX 24V tool — drills, saws, grinders, blowers, trimmers, lights, and radios. Works with all FLEX 24V chargers including rapid chargers.
2-Pack — Zero Downtime
Always have one battery in the tool and one on the charger. When the first runs out, swap and keep working. A single pack keeps up with light work; two 8.0Ah packs handle all-day job site demands.
Job Site Tough
Impact-resistant housing shrugs off drops. Moisture protection keeps the battery reliable in outdoor conditions. Built to survive the same job site abuse your FLEX tools handle every day.
Frequently Asked Questions
Q: How long does the 8.0Ah battery last on a single charge?
A: Runtime depends on the tool. Light-duty tools such as impact drivers and drills run for hours on a single charge. Mid-range tools such as circular saws and reciprocating saws get extended runtime with many cuts per charge. High-demand tools such as rotary hammers and miter saws draw the most current but still get meaningful runtime with the 8.0Ah pack. Compared to FLEX 2.5Ah and 5.0Ah batteries, the 8.0Ah provides over 3 times and 60 percent more runtime respectively. THERMA-TECH heat management adds up to 25 percent more runtime by reducing heat-related power loss.
Q: Which FLEX tools are compatible with this 24V 8.0Ah battery?
A: This battery is 100 percent cross-compatible with every FLEX 24V cordless tool and charger. It fits FLEX 24V hammer drills, drill drivers, impact drivers, impact wrenches, circular saws, reciprocating saws, angle grinders, blowers, string trimmers, work lights, job site radios, and all other FLEX 24V tools. There is no special adapter or modification needed — the battery clicks directly into any FLEX 24V tool just like the original.
Q: What is THERMA-TECH and how does it improve battery performance?
A: THERMA-TECH is an active cooling system built into the battery that minimizes heat buildup during high-demand use. Standard batteries lose efficiency as they heat up under heavy load, causing voltage drop and reduced runtime. THERMA-TECH dissipates heat more effectively, providing up to 25 percent longer runtime compared to batteries without active heat management. This means you can push your FLEX tools harder for longer without performance throttling. FLEX also offers THERMA-TECH Plus on their Stacked Lithium batteries (3.5Ah, 6.0Ah, 10.0Ah), which delivers up to 300 percent longer battery life and 100 percent faster charging.
Q: How long does it take to charge the 8.0Ah FLEX battery?
A: Charging time depends on the charger. With the FLEX 160W fast charger, a full charge takes approximately 90 minutes. Using the FLEX 280W rapid charger, the 8.0Ah battery charges in about 50 minutes. The battery includes POWER IQ management that communicates with the charger to optimize the charging rate and protect cell health. The LED indicator on the charger shows charging status: blinking green means charging, solid green means fully charged and ready.
Q: Which tools or chargers are NOT compatible with this FLEX 24V battery?
A: This 24V battery is designed exclusively for the FLEX 24V tool platform. It is NOT compatible with FLEX 12V tools, FLEX 20V tools, or any other brand's cordless tool system (such as DeWalt 20V, Milwaukee M18, Makita LXT, or Ryobi 18V). It does not fit FLEX corded tools or non-FLEX chargers. Always use this battery with a FLEX 24V charger for safe and efficient charging.
Q: What does the POWER IQ management system do?
A: POWER IQ is a smart battery management system that continuously monitors and optimizes each individual cell inside the battery. It provides overload protection that prevents damage during high-demand tasks by temporarily cutting power if the tool draws excessive current. It performs active cell balancing to ensure all cells discharge evenly, maintaining consistent voltage until the battery is depleted. It also manages the charge and discharge cycle intelligently to extend the overall lifespan of the battery, helping it reach 500 or more charge cycles before capacity degradation becomes noticeable.
Q: How does the 2-pack 8.0Ah compare to FLEX 5.0Ah and 2.5Ah batteries?
A: The 8.0Ah battery provides over 3 times the runtime of the FLEX 2.5Ah and 60 percent more runtime than the FLEX 5.0Ah. At 192 watt-hours of total energy, a single 8.0Ah pack powers demanding tools such as circular saws and rotary hammers for significantly longer. A 2-pack of 8.0Ah batteries means you have one in the tool and one on the charger, eliminating downtime on long job site days. The trade-off is weight — the 8.0Ah is heavier than the smaller packs, so for overhead or one-handed work, a lighter 2.5Ah or 5.0Ah may be more comfortable.
What's Included
- 2 x 24V 8.0Ah (8000mAh) Lithium-Ion Batteries for FLEX 24V Tools
- 1 x Installation / User Guide
Summary
| Battery Type | Lithium-Ion (Li-ion) |
| Voltage | 24V |
| Capacity | 8.0Ah (8000mAh) / 192Wh per battery |
| Technology | THERMA-TECH Heat Management + POWER IQ Smart Control |
| Package | 2-Pack (2 batteries) |
| Protections | Overload, overheat, over-discharge, short circuit |
| Compatibility | All FLEX 24V cordless tools and chargers — 100% cross-compatible |
| Runtime vs 2.5Ah | Over 3 times longer |
| Runtime vs 5.0Ah | 60 percent longer |
This is a third-party replacement product sold by ZhanPeng, operated by Changsha Liping Technology Co., Ltd. It is not manufactured by or affiliated with the original device manufacturer. All brand names, model numbers, and trademarks referenced are the property of their respective owners and are used solely to indicate product compatibility. ZhanPeng is an independent retailer and is not sponsored, authorized, or otherwise connected with the original equipment manufacturer.