Energizer Ultimate Lithium 9V Batteries (2 Pack), Lithium 9 Volt Batteries

A+

Bought for backup for two wired in smoke alarms with ten year expiry matching the shelf life of the batteries. I’ll check back in ten years and let you know if they did the job!

Yes, good bastards last long.time

Purchased for battery change in smoke detectors

This type of battery is the only one I use in any size, they are the only batteries that have NEVER LEAKED , long shelf life.

Good

Energizer are definitely the best lithium batteries. They are longer lasting and tend not to break open and leak ruining my equipment. I selected the Ultimate Lithium 9V batteries for my smoke alarms. These should last 2 to 3 years and maybe longer. Tired of changing smoke alarm batteries at 3 AM which is when they seem to fail. No I change them before they fail.

Absolutely the best battery for guitar pickup Lasts seemingly forever !! Ok not forever but at least 1 year on my LRBaggs pickup anthem. About double the time compared to alkaline 9v for me

If you need batteries, personally, I feel these are the best. They last a very long time. Good quality cost a little more but you get what you pay for.

Several of my smoke detectors started to beep indicating the need to replace batteries. Most of them are accessible with a small step ladder but the one in the master bedroom is about 12 feet high. I proactively replaced that one with this lithium battery when I had a painter at the house for something else. The last thing I want to do is be woken up by a beeping battery on a 12 ft ceiling and try get out a ladder and attempt to replace it. It’s too soon to know how long these will last but they should be an improvement over alkaline batteries. Energizer is a brand I trust so it’s worth the money for me vs a less expensive generic. I plan on replacing it in 2 years just to avoid the uncertainty. It was compatible with my smoke detector and fits like a regular 9 volt battery would.

So I see several reviews complaining about these not lasting 10 years, these have a 10 year SHELF LIFE not a 10 year USE LIFE- those are 2 entirely different things. 10 year shelf life refers to how long these will be viable for sitting on a shelf/stored not plugged into anything. As far as actually putting these into something you can expect use-life to be about the same as a typical 9V or a little longer. I bought these to power the Fishman Fluence active pickups in my guitar because these types of batteries provide very consistent power - which is where these excel compared to your average alkaline 9V which can waver a little in power getting worse over time. The only issue with these is they will suddenly die out on you once they are done but they will give you the same consistent power until its last breathe. Who these are for: -People who have devices/uses that require very consistent power. -People using devices that are subjected to more extreme temperatures. -Expensive devices that could be destroyed by a small battery leak. -People who like to store up on back-up batteries for a long time for later use. Who these are NOT for: -People who think 10 year shelf-life is the same as 10 year use-life. -People looking for rechargeable batteries (these are NOT the same as rechargable lithium batteries) *NOTE: These are very close to the size of your average alkaline battery but ever so slightly bigger since the edges are not rounded so if you want to put these into something where the battery space is a very tight fit it might not fit.