The Energizer Ultimate Lithium is an amazing product. If you need a battery that you don't want to replace often, this is the thing.

Use AA lithium batteries in a variety of devices, whether you need smoke detector batteries, camera batteries, or double A batteries for your child's games. Ultimate Lithium Energizer AA batteries hold power up to 20 years in storage.

Energizer® Ultimate Lithium™ Batteries Nothing outlasts Energizer® Ultimate Lithium™ AA batteries. The Energizer® Ultimate Lithium™ batteries are not only the #1 longest-lasting AA batteries…they are complete with leak resistance and performance in extreme temperatures (-40ºF to 140ºF or -40ºC to 60ºC).

Ultimate Lithium batteries are long-lasting AA batteries, complete with leak resistance and performance in extreme temperatures (-40°F to +140°F or -40°C to +60°C).

Energizer® Ultimate Lithium™ AA and AAA last up to 20 years in storage, while our 9V lasts up to 10 years in storage. Energizer Recharge® AA, AAA, C, D, and 9V last charged up to 12 months in storage, with a battery life of up to 5 years under normal conditions for AA and AAA batteries.

From the manufacturer

up to 20 years Energizer® Ultimate Lithium™ AA and AAA last up to 20 years in storage, while our 9V lasts up to 10 years in storage. Energizer Recharge® AA, AAA, C, D, and 9V last charged up to 12 months in storage, with a battery life of up to 5 years under normal conditions for AA and AAA batteries.

AA batteries The Energizer® Ultimate Lithium™ batteries are the #1 longest-lasting AA batteries – complete with leak resistance and performance in extreme temperatures (-40ºF to 140ºF or -40ºC to 60ºC).

A typical charge or use cycle for a lithium-ion battery is 8 hours of use, 1 hour to charge and another 8 hours of use. No cool down period is needed. This allows the battery to be used continuously throughout a 24-hour shift, with downtime occurring only during short periods of opportunity charging.

between 2 to 10 years The length of time a Lithium-ion battery can last without charging depends on several factors, including the capacity of the battery, the device it's in, and how much power the device is using. On average, most Lithium-ion batteries can last between 2 to 10 years without charging, depending on how they are stored.

A typical charge or use cycle for a lithium-ion battery is 8 hours of use, 1 hour to charge and another 8 hours of use.

For example, a lithium-ion cell charged to 4.20V/cell typically delivers 300–500 cycles. If charged to only 4.10V/cell, the life can be prolonged to 600–1,000 cycles; 4.0V/cell should deliver 1,200–2,000 and 3.90V/cell should provide 2,400–4,000 cycles.