The Bohler Standard Battery is the perfect replacement battery for your Guardian Air PAPR. It has a capacity of 5, 200mAh, which provides up to 12 hours of continuous operation, so you can work all day long without having to worry about running out of power. The battery is also lightweight and easy to replace, so you can get back to work quickly and easily. And it comes with a one-year warranty, so you can be confident in its quality and reliability. Benefits: Stay powered up all day long with the Bohler Standard Battery's long-lasting capacity Get back to work quickly and easily with the battery's lightweight and easy-to-replace design Be confident in the quality and reliability of the battery with its one-year warranty Features 5, 200mAh capacity for up to 12 hours of continuous operation Lightweight and easy to replace One-year warranty Compatibility Guardian 50M Air Guardian 50FM Air