Energizer 123 Batteries, Lithium CR123A Battery, 6 Battery Count

The glass break portion of my alarm started to beep and the panel said "low battery". I went to Amazon, search for lithium 9-volt battery. Among the vast number of choices there was one from Eveready. This being a brand name I know and respect, so I purchased it. One day later it was at my front door. I replaced the old battery with this new one. Now everything is quiet and working properly.

I purchase these lithium batteries when I need long-term performance without having to pay constant attention to whether or not the battery still has power. I find them perfect for the alarm clock backup feature in the event of a power failure and for emergency equipment like radios and flashlights that are not used every day. Their best features are their long life and dependability. These batteries outperform your typical battery by a mile. "Oh, but the cost is prohibitive," some people will say. I can attest that they are worth every penny. One would replace standard batteries at least twice before having to repurchase one of these powerhouses once.

Compared to the cost unbeatable.

Not all batteries are rechargeable, but its getting there. Still, this brand is the best for length of use and to keep in old appliances, flashlights, spare power toothbrushes, and remotes that function on infrared. For example, I used to use their round batteries on my daily power toothbrush and it outlasted the others by about 50%. But it was also more expensive.

Great Product - But Far Too Expensive For Something That Is Far Weaker Than It Should Be For The $$$ Energizer, Duracell, Rayovac, and all the other battery manufacturers need be legislated to produce batteries with far greater life durations than what is currently produced for the $$$ charged!!! Better Batteries !!!

Battery replacement, was easy to install

Delivered quickly, in excellent condition, and as advertised.

Do not confuse shelf life with use life.I use these as batteries in my hardwired home smoke detectors where they have consistently provided 5 years of use life. This minimizes the frequency of having to have someone climb a ladder to change the batteries.