TLDR Review: Energizer Ultimate Lithium 9V Battery
Pros
- •Lithium technology delivers longeasting power compared to alkaline batteries, especially beneficial in electronics like security cameras and smoke detectors.
- •The 1ear power storage claim means these batteries should remain fresh and ready even after long periods on the shelf, great for emergency and rarely used devices.
- •100% learoof design provides peace of mind by preventing damage to devices over time, particularly useful for smoke detectors, sensors, and garage remotes.
- •Performs well in cold temperatures, making it dependable for tools or devices stored or used in chilly environments.
- •Many users find these batteries good value given their durability and reduced need for frequent replacements.
- •Newer battery designs have improved fit with rounded edges to better suit tight battery compartments.
- •Plastic casing and internal engineering help prevent the leaks common with loweuality 9V batteries.
Cons
- •Fit issues persist in some devices due to the battery being physically larger or squarhaped, sometimes causing battery compartment covers to break or making replacement tricky.
- •Some users report premature battery failure—lasting just over a year or less in certain devices like garage door openers or CO2 detectors—contrary to expectations for lithium batteries.
- •The advertised 1ear lifespan may be optimistic; actual longevity often seems closer to 8 years or less depending on usage and device.
- •Warranty service and customer support are reportedly unhelpful or dismissive, causing frustration when handling claims related to battery performance.
- •Battery life can be inconsistent, with a minority experiencing duds or shortehan-expected run times.
- •Questions have been raised about older stock being sold without clear indication, possibly affecting freshness and performance.
- •Some batteries arrived without original packaging, leading to concerns about authenticity or charge status.
Bottom Line
If you want a 9V battery that generally lasts longer than alkalines, avoids nasty leaks, and can sit on the shelf for years ready to go, the *Energizer Ultimate Lithium 9V* is a smart pick—especially for smoke detectors and emergency gear. Just be aware that fit can be tight or awkward in certain devices, and not every battery will achieve the full advertised lifespan. If your device’s battery compartment is very snug or you want top-notch warranty support, you might look into alternative brands, but for solid leak protection and dependable lithium power, this remains a top contender.
How we researched this
About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 133 retailers to give you the short version.
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