ACDelco 12-Count 9 Volt Batteries, Maximum Power Super Alkaline Battery, 7-Year Shelf Life, Recloseable Packaging

Customers find these batteries as good as name-brand alternatives and appreciate their value for money. They work well in smoke detectors and provide proper power, with one customer noting they perform particularly well during cold cranks. The battery life receives mixed feedback - while some say they last as long as Everready batteries, others report they only last 5 days. Customers disagree on compatibility, with some finding them perfect for smoke detectors while others say they're not compatible with fire alarms.