TenHutt 24V Replacement Battery FX0331-1 — 6.0Ah for Flex Tools & Chargers

Premium 24V replacement battery for Flex tools

Meet a high-capacity solution crafted for Flex 24V systems, designed to replace the FX0331-1 family with a reliable, detachable energy source. This 6.0Ah (144Wh) unit provides steady power while keeping weight manageable at roughly 790 g, making it suitable for extended projects, on-site tasks, and routine maintenance. The built-in LED indicator gives you a quick read on remaining charge, helping you plan downtime or tool changes without guessing.

Note: this battery is not compatible with the FX0421-Z charger model, so please verify your charger and tool compatibility before purchase.

Key benefits at a glance

• Wide compatibility: designed to replace FX0331-1, FX0221-1, FX0311-1, FX0321-1, FX0121-1, FX0341-1, and FX0231-1, and to work with original 24V chargers FX0411-Z, FX0431-Z, and FX0451-Z.
• Safety-first design: UL-listed cells and an intelligent Battery Management System guard against shorts, overcharge, over-discharge, over-voltage, and heat buildup.
• Durable construction: rugged PC+ABS housing offers resistance to daily wear and on-site impacts, supporting longer service life in tough environments.
• Clear power visibility: a four-level LED display lets you assess remaining capacity at a glance, helping you schedule swaps and avoid interruptions.
• Efficient cooling: intentional airflow channels and ventilation help manage temperature during extended use, promoting steady performance.
• Easy installation: quick-release button and interface protection streamline battery swaps for faster tool changes.

Real-world use cases

Whether you’re drilling, cutting, or sanding across a full workday, this replacement battery aims to sustain consistent performance while you stay productive. The balance of energy capacity and weight supports longer operation without excessive fatigue, and the LED readout helps you avoid unexpected downtime. In busy jobsite conditions, the rugged build and protective electronics contribute to reliable operation and predictable tool behavior after hours of use.

What to know before you buy

This TenHutt replacement is designed as an OEM-style alternative for Flex 24V tools and compatible chargers, with a clear emphasis on dependable power delivery and practical usability. If your setup includes the FX0421-Z charger, you’ll want a different model, as noted above. Always confirm model compatibility with your specific tools and chargers to ensure a seamless fit and optimal performance.