Energizer Ultimate Lithium AA is a non-rechargeable 1.5V battery using lithium iron disulfide chemistry for high energy density (≈3500mWh) and extreme temperature resilience (-40°C to 60°C). It weighs 15g—33% lighter than alkaline—with a 20-year shelf life, leak-proof design, and stable voltage delivery ideal for digital cameras, smoke detectors, and outdoor gear.
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What defines Energizer Ultimate Lithium AA batteries?
These batteries use lithium iron disulfide for 1.5V output, 3000mAh capacity, and 3A peak current. Their airtight seal prevents leaks, while lightweight construction suits aerospace/medical devices. Pro Tip: Use them in high-drain gear like strobe lights—alkaline voltage drops after 15% discharge, but lithium maintains ≥1.2V until depletion.
Unlike zinc-based cells, Ultimate Lithium thrives in sub-zero temps—perfect for trail cameras in winter. A runtime test showed 8.7 hours in a 100-lumen flashlight versus alkaline’s 2.3 hours. But why does chemistry matter? Lithium’s atomic structure allows faster ion movement, reducing internal resistance. For example, drones using these batteries gain 20% extra flight time.
| Attribute | Ultimate Lithium | Alkaline |
|---|---|---|
| Energy Density | 3500mWh | 2200mWh |
| Weight | 15g | 23g |
| Cost per Unit | $1.50 | $0.75 |
How do they perform in extreme temperatures?
Energizer Lithium AA operates at -40°C to 60°C with ≤15% capacity loss at -20°C, while alkaline fails below -18°C. Arctic researchers rely on them for data loggers—alkaline self-discharges 30% monthly at -30°C, lithium only 2%.
Beyond cold resilience, lithium’s organic electrolyte avoids freezing. In contrast, alkaline’s aqueous KOH electrolyte crystallizes, increasing internal resistance. On the practical side, a ski resort’s emergency radios using lithium AAs lasted 72 hours in -25°C storms. Pro Tip: Store lithium batteries in your car’s glovebox—they won’t leak or explode in summer heat.
| Condition | Lithium Capacity | Alkaline Capacity |
|---|---|---|
| -20°C | 85% | 10% |
| 50°C | 95% | 60% |
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Are they better than rechargeable NiMH?
For single-use scenarios, yes—Ultimate Lithium delivers 3× the energy of a 2000mAh NiMH (1.2V). However, NiMH wins long-term for eco-friendliness. A gamer’s wireless mouse lasts 6 weeks on lithium vs 10 days on NiMH, but after 12 recharges, NiMH becomes cheaper.
Why pick lithium? Low-self discharge NiMH still loses 15% monthly; lithium retains 90% after a decade. Yet, cameras shooting 500 flashes/day would need 100+ disposables yearly—better with NiMH.
Redway Battery Expert Insight
FAQs
Yes—drop them at lithium battery recycling centers. Never trash them; lithium reacts dangerously in compactors.
Why do they cost more than alkaline?
Higher energy density materials (Li vs Zn) and R&D for temperature resilience justify the 2× price, but they last 3× longer in cold/high-drain use.
Do lithium AAs work in all devices?
Mostly—check for 1.5V compatibility. Some vintage electronics need 1.2V NiMH; lithium’s 1.8V initial spike might fry circuits.
