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

More power (vs. Energizer Max results vary by device) for the devices you rely on. Up to 10 year back-up battery in AC powered smoke detectors. That's positivenergy. www.energizer.com. www.energizer.ca. More power for the devices you rely on vs. alkaline 9V. Ideal for smoke alarms, professional audio & home improvement devices. Lightweight and performs in extreme temperatures (-40 to 140 degrees F). Questions or comments? 1-800-383-7323. Made in China.