FLEX 24V 5.0Ah Lithium-Ion Battery FX0121-1 | High-Performance Power

Elevate your FLEX 24V toolkit with the FX0121-1 battery

The FLEX 24V 5.0Ah Lithium-Ion Battery FX0121-1 is built to move with you through demanding tasks. It blends a robust 24V platform with intelligent battery management to deliver steady power when you need it most. From shop floors to job sites, this battery stays cool and reliable, helping you stay productive without slowing down.

Smart power for real-world use

Power IQ smart management continuously monitors the cells to optimize performance, offering overload protection and a steadier power profile. The result can feel like a more confident tool response, especially when you push a high-drain tool through long tasks.

• Intelligent monitoring keeps cells in balance for reliable operation
• Overload protection helps guard against unexpected drops in power
• Cross-compatibility with FLEX 24V batteries, chargers, and tools simplifies your kit

THERMA-TECH cooling for longer runtime

The built-in THERMA-TECH cooling system minimizes heat buildup during use, helping maintain performance as you work. In real terms, this can translate to more consistent run times and reduced heat-induced throttling on hot days.

• Innovative cooling reduces heat during demanding tasks
• Sealed electronics and a shock-resistant design for tougher environments

Rugged design with clear charge visibility

Engineered to withstand drops, dust, and wet conditions, the FX0121-1 is built for tough sites. The patented dual-sided fuel gauge lets you quickly view charge status from multiple angles, so you know when it’s time to top up.

• Drop, dust, and water resistant construction
• Dual-sided fuel gauge for fast charge awareness

Fast charging and reliable recharging

Flexibility matters on the clock. A 160W fast charger reaches a full top-up in about 60 minutes, while a 280W rapid charger can deliver a 30-minute charge. The battery lock system helps prevent accidental disconnections during recharging.

Warranty and ongoing protection

Register your FLEX tool, battery, or charger within 30 days to activate a 5-year limited warranty; without registration, a 3-year limited warranty applies. FLEX stands behind the quality of the 24V platform and its long-term durability.