The Energizer Advanced Lithium 9-volt battery provides more power for the devices you rely on. The 9-volt Lithium battery is great for all uses, including toys, smoke detectors, carbon monoxide detectors and other devices requiring a 9-volt battery. 750 milliamp per hour capacityLeak-proofLighter weight than alkaline batteriesLongest-lasting battery for high-tech devicesSuperior performance in extreme temperatures from -40 degree Fahrenheit to 140 degree Fahrenheit – great for use in all seasons