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Energizer Ultimate Lithium is Energizer’s premium lithium battery range, offering up to nine times the battery life of standard alkaline batteries in high-drain applications such as wireless security detectors, PIR sensors, remote controls, and access control keyfobs.
The consistent voltage delivery throughout the lithium cell’s discharge cycle is particularly valuable in security and alarm applications: many devices report low battery when voltage drops below a threshold, and alkaline batteries show an early voltage drop under load that can trigger false low-battery warnings before the battery is actually exhausted. Lithium cells maintain near-nominal voltage for the majority of their discharge cycle.
Temperature performance is the other key advantage for security installations: Energizer Ultimate Lithium cells operate reliably from -40°C to +60°C, making them the appropriate choice for outdoor security equipment, PIR detectors in unheated spaces, and any security accessory installed in environments that experience temperature extremes.
The AAA size is used in a wide range of security accessories: Ajax and similar wireless alarm keyfobs, handheld remote controls, small wireless detectors, and many other security and smart home devices.
The pack of 10 provides stock for multiple devices or for planned maintenance battery replacements across a multi-device installation.
Key Features
- Energizer Ultimate Lithium AAA: up to 9x longer life than standard alkaline
- Consistent voltage throughout discharge: fewer false low-battery alarms
- Temperature range: reliable from -40°C to +60°C for outdoor and unheated positions
- Pack of 10: for multiple devices or planned maintenance replacement stock
- For security detectors, keyfobs, remote controls, and alarm accessories
- Lithium chemistry: lighter weight and leak-resistant compared to alkaline cells
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