FLEX 24V 2.5Ah Lithium-Ion Battery FX0111-1 — Fast-Charge with POWER IQ & THERMA-TECH Cooling

The FLEX 24V 2.5Ah Lithium-Ion Battery (FX0111-1) is a compact, fast-charging power cell that delivers up to 20% more usable output thanks to integrated POWER IQ management and THERMA-TECH cooling.

This battery pairs high discharge capability with intelligent thermal control to keep tools running longer and safer. Built for professional and serious DIY use, the FX0111-1 balances runtime, recharge speed, and durability in a 24V platform that works across FLEX 24V tools and chargers. Engineered seals, an impact-resistant housing, and a dual-sided fuel gauge make it easy to check charge and keep working in demanding environments.

How much runtime and power can I expect from this 2.5Ah battery?

The 2.5Ah capacity gives a compact footprint while delivering boosted output when tools demand it, up to 20% more effective drive compared with baseline cells on the same platform. POWER IQ optimizes cell performance under load so you get higher peak power and stable delivery through heavy cuts or fast driving tasks.

• 2.5Ah capacity for a balance of weight and runtime
• POWER IQ for intelligent load management and overload protection
• Up to 20% higher usable output versus earlier 24V cells
• Best for intermittent high-draw tasks and general jobsite use

How does THERMA-TECH cooling change real-world performance?

THERMA-TECH actively reduces heat buildup inside the battery pack so internal resistance stays lower during extended use. The result is longer runtime per charge and more consistent power delivery rather than tapering when the battery heats up.

• Cooling system lowers cell temperature under load
• Reduced thermal degradation extends effective runtime
• Helps maintain steady power for repetitive or demanding tasks
• Designed to work with fast charging without excess heat stress

Is it durable enough for jobsite conditions?

Yes—this pack is built with shock-resistant construction and sealed electronics to resist dust, water, and drops. FLEX also added a battery lock system to prevent accidental disengagement while tools are in use or during charging.

• Drop-, dust-, and water-resistant housing for jobsite ruggedness
• Shock-absorbing design protects cells from impacts
• Sealed electronics minimize contamination-related failures
• Battery lock system prevents unexpected disconnection

How fast does it charge and how will I know the remaining battery?

The FX0111-1 supports fast charging, reaching a full charge in approximately 30 minutes with compatible FLEX chargers. The patented dual-sided fuel gauge displays charge level from multiple angles so you can quickly assess remaining runtime without removing the pack.

• Fast-charging capable: ~30 minutes to full with supported chargers
• Dual-sided fuel gauge for easy, visible charge checks
• Designed to support repeated rapid charge cycles safely
• Compatible with all FLEX 24V chargers and tools for convenient swapping

Who is this for? The FLEX 24V 2.5Ah (FX0111-1) suits professionals and committed DIYers who need a lightweight, quick-charging battery that still delivers high peak power. It’s ideal for users who value cross-compatibility across a 24V tool lineup, require reliable thermal management during heavy use, and want the durability to withstand jobsite conditions. If your work includes repetitive high-draw tasks or you prefer a compact pack that won’t slow down your workflow during long days, this battery is a practical choice. Remember to register within 30 days to access the FLEX 5-year limited warranty; otherwise a 3-year limited warranty applies.