FLEX 24V Lithium-Ion Starter Kit — 5.0Ah Battery & 160W Fast Charger, THERMA-TECH Cooling

The FLEX 24V Lithium-Ion Starter Kit (FX0411-1C) pairs a 5.0Ah high-output battery with a 160W fast charger to deliver noticeably more power and much quicker recharge times for FLEX 24V tools.

Built around FLEX’s 24V lithium platform, this starter kit combines a smart battery management system and THERMA-TECH™ cooling to increase usable power and sustain tool performance under heavy loads. The bundle includes one 5.0Ah lithium-ion battery and a 160W charger engineered to recharge in about half the time of standard 75W chargers, plus built-in protections and a drop-resistant housing for demanding jobsite conditions.

How much more power and runtime can I expect from the FLEX 24V battery?

The 24V platform is tuned for higher output: intelligent electronics optimize discharge for up to about 20% more usable power versus earlier FLEX batteries. THERMA-TECH cooling helps keep cells cooler under load, which preserves runtime and maintains consistent performance during extended use.

• Up to ~20% higher power delivery under heavy loads
• Cooling system reduces heat for approximately 25% longer runtime
• 5.0Ah capacity balances run time with manageable weight

How fast does the included 160W charger recharge the battery?

The 160W fast charger dramatically shortens downtime by cutting charge times to about half compared with typical 75W chargers. Faster charging gets you back to work sooner while the charger’s circuitry monitors cell temperature and charge rate for safer, more reliable recharges.

• 160W output for significantly faster charge cycles
• Intelligent charge control protects battery health
• Compatible with all FLEX 24V batteries and chargers for flexible charging options

What protections and durability features are built into the kit?

The battery uses an intelligent processor to guard against overload, over-temperature, and other stressors that shorten battery life. The pack also incorporates a shock-resistant, sealed design that helps the battery survive drops, dust, and typical jobsite abuse.

• Integrated overload and temperature protection circuitry
• DROP-RESISTANT housing with sealed electronics for durability
• Designed to maintain consistent power under demanding conditions

Is this battery compatible with my other FLEX tools and what warranty applies?

The 24V battery is cross-compatible with the entire FLEX 24V tool and charger family, so you can mix and match packs and chargers across devices. FLEX offers a generous warranty—register the product within 30 days to qualify for a 5-year limited warranty; otherwise a 3-year limited warranty applies.

• Works with all FLEX 24V chargers and tools for platform flexibility
• Register within 30 days for a 5-year limited warranty
• 3-year limited warranty available without registration

Who is this kit for? The FLEX 24V Starter Kit is aimed at DIYers and professionals who need a compact but powerful battery solution that cuts charging downtime and holds up to jobsite demands. It suits users upgrading from lower-capacity packs, contractors wanting a lighter 24V platform with strong output, and anyone who values faster recharge, intelligent safety features, and compatibility across the FLEX 24V lineup.