Ensure absolute reliability for your critical safety systems with the 5 Star 9V Alkaline Battery. This premium single-pack 9-volt battery is designed to provide stable, low-drain power over immense timeframes, paired with the capability to deliver punchy alarms when triggered. Built to unyielding quality controls, 5 Star offers the ultimate peace of mind for the devices meant to protect you. The definitive choice for workplace and residential smoke detectors, carbon monoxide alarms, multi-meters, and electronic testing gear.