Customer Ratings & Reviews

I have been using this brand of battery in all of my battery operated devices and smoke detectors since they were introduced to the market. Extra long life and reliability are the main reason I will not be using any other brands.

GREAT BATTERY TO USE IN MY SMOKE DETECTOR. NEEDED 5, BUT COULD ONLY OBTAIN 4....THAT WAS MY ONLY PROBLEM. BEST BUY HAD A BETTER PRICE AND GREAT CUSTOMER SERVICE IN HELPING ME FIND WHAT I NEEDED.

I change smoke detector batteries yearly. I normally buy batteries that are on sale. I happened to see batteries on sale in Best Buy weekly ads. The price was good, so I bought 6 batteries. They work very well. Good quality and very good price.

Can’t tell much difference but all I know is that it didn’t give up on me after 2 days. If a battery survives for more than 2 days that means the quality is good.

These lithium batteries are awesome! They really do last longer in electronic devices! I use them for my guitar accessories that eat up batteries pretty fast , but not these!

Have been using these for a few years... long lasting, best for smart home products, like my ring camera and sensors. Change out every year, instead of every month.

Purchased this Ultimate Lithium battery to go in my new Winbest Pro300 metal detector from Best Buy. Needed a long lasting, strong battery to use on a planned trip to the beach to seek out my fortune!

Great battery, the life of this battery is great. Just when you think it’s life has ran out- poof toy works again!

Excellent and long lasting batteries. They are what I use the most. I used this battery in my Garage door opener keypad and it has done well.

Caught these at a very great price, and last very long. Got these to replace the Smoke Alarm batteries, as the other only lasted about 6 months. We shall see how much life these will give.

Install this Energizer Ultimate lithium 9-volt battery in your power-hungry devices for long-lasting performance. It works in extreme temperatures, providing reliable power in summer heat or bitterly.

I have literally compared this with other brands... have yet to replace this energizer battery. I have gone through 2 top brands and this is still working great.

Because Lithium "primary" cells last longer than Alkalines, AND can deliver more current, AND have very long "shelf lives", I've switched to using them in my remote controls and Anything Else that uses Alkalines. Yes, they cost more than Alkalines, but I haven't had to worry about BATTERY LEAKAGE like I do with Alkalines and I have high confidence the Lithium-powered device will still work even if it's been "idle" for months at a time.

These lithium batteries really have endurance going for them, cost aside. I use these in my smoke detectors.

Lasts long. Dependable battery and has long shelf life! Best battery out there!

2-pack of Energizer Ultimate Lithium 9-Volt batteries; Our longest-lasting 9-Volt battery; Powers your most critical devices - ideal for your smart home devices, outdoor surveillance systems, digital cameras and handheld games; Holds power up to 10 years in storage for trustworthy backup energy, so you’re always prepared

Light weight battery with a long life. Works great in my smoke detector.

Purchased these 3 batteries because we were all out. I always like to have extra in case we need them. Used one for my Clock radio, as a battery backup. Works well.

good battery life, good price. you get what you pay for

some of the best batteries that you can find. last and shelf life is good.