Energizer Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries

Customers find these batteries perform well, particularly in high-output LED flashlights, and appreciate their compatibility with alarm systems and Arlo security cameras. Moreover, they receive positive feedback for their accuracy as genuine Energizer products and reliable power in flashlight use. However, the battery life receives mixed reviews, with some saying they last quite a long time while others report them dead in less than a month. Additionally, customers disagree on the freshness of the batteries and their fit, with some reporting perfect fit for alarm sensors while others find them incompatible with Surefire flashlights.