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Energizer Ultimate Lithium AA cells are disposable lithium batteries built for high-drain devices. They are the lightest AA option Energizer sells, roughly a third lighter than alkaline, and they hold power far longer in digital cameras, flashes and wireless headsets. They also keep working from -40F to 140F, which alkaline cells cannot. Against rechargeable NiMH cells they win on shelf life and cold-weather performance but cannot be recharged, so heavy daily users pay more over time. They suit camera bags, trail devices and anything stored for years between uses.
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Owners rate these highly for camera flashes, headlamps and cold-weather gear, citing long runtime and no leaks. The main complaint is the higher cost per cell compared with alkaline or rechargeables.
Energizer Ultimate Lithium AA batteries are made to power high-tech devices. They are designed for use in digital cameras, wireless headsets, MP3 players and more.
In digital cameras, they run up to 8 times longer than ordinary alkaline batteries. They also work in extreme temperatures, from -40°F to 140°F.
