AIR/PRO RECHARGEABLE BATTERY: High-quality nickel metal hydride rechargeable battery for the Trend Airshield Pro full face shield. 8 HOURS OF MASK POWER: Provides at least 8 hours of operation on a full charge, ensuring uninterrupted use of your dust protector mask. SIMPLE TO SWAP OUT: Quick and easy to replace and install, ensuring you can get back to your woodworking or other projects without delay. HAVE A SPARE TO HAND: The perfect spare/replacement battery ensures that you always have power to your Airshield Pro when you need it. TRUE COMPATIBILITY: Designed specifically for the AIR/PRO, this spare/replacement battery is compact and lightweight for easy transport and storage.