Energizer MAX 9V Alkaline Battery

The Energizer MAX 9V is a single-use alkaline battery in the standard PP3 (6LR61) snap-connector size, the rectangular cell used in smoke detectors, toys and household electronics. Buy it when the smoke detector starts chirping and you want a fresh, known-brand cell rather than an unknown bargain. Energizer builds MAX cells to resist leaks, which matters in a smoke detector that sits untouched for months, and rates them for up to 5 years of shelf storage, so a spare kept in the drawer will still be good when you need it. It is non-rechargeable, so do not put it in a charger.