Ultimate Lithium Batteries are Energizer's best & longest-lasting, disposable AA batteries. Depend on these batteries for your most critical devices for work, play & home. Whether used in a wireless mouse, high-powered LED lighting, laser level or stud finder, Ultimate Lithium Batteries help you stay powered up on the job. They offer superior performance in temperatures from negative 40 to 140 degrees Fahrenheit so they're ideal for use in all seasons. These longer-lasting, leakproof batteries hold their power in storage for up to 20 years. They create less waste & have less impact on the planet because you're using fewer batteries.