Energizer Ultimate Lithium AA (x4)

Energizer Ultimate Lithium AA batteries (LR6 format, FR6 reference) are the premium tier of AA batteries. Energizer bills them as the longest-lasting AA batteries in the world, and their lithium chemistry indeed gives them a clear edge over conventional alkaline batteries, especially on devices that consume a lot of energy.

Their main asset is endurance: on a camera, a flash, a GPS, a motion detector, a toy or a game controller, they last far longer than an alkaline and hold a stable voltage until the end of charge, with no gradual performance drop. They maintain a 1.5-volt voltage, fully compatible with all AA devices.

They are also remarkably versatile: they work over a wide temperature range, from -40°C to 60°C, making them ideal for outdoor use, deep cold or demanding uses. They are about 33% lighter than alkalines, a plus for worn or carried devices, and are designed to resist leaks.

Sold here in a pack of 4, they store for up to 25 years in their packaging, a record that makes them an excellent choice for backup batteries (torches, detectors, emergency gear). Like any lithium battery, they are single-use and recycle at end of life. For power-hungry devices or extreme conditions, the Energizer Ultimate Lithium AA is the benchmark.