Enegitech 9V Lithium Battery, 9 Volt Lithium Battery 1200mAh for Smoke Detector, Fire Alarm, Keyless Entry Door Lock, Multimeter, Metal Detector Non-Rechargeable 4 Pack

We needed to replace the batteries in our smoke alarms. These appear to be good quality and fit perfectly into the units. The best part is that these batteries were cheaper that the brand name batteries

These batteries are great! We use them for the bass guitar at church. They last longer than any other brand we've tried, and we've tried a lot of them. I've subscribed so that we will never run out!

These are standard Li-ion batteries useful for smoke alarm back-up battery replacement. What I like: 1. Initial high voltage level as received. My Fluke multi-meter measured the battery voltage in the range of 9.70-9.74 volts across all of the batteries. This is important because smoke alram manufacturers I have noticed are upping the minimum threshold voltage at which they trigger the infamous "chirp" in the middle of a cold night (when the resting voltage drops to its lowest). My newest Kiddie alarms start chirping at a full 9.2~9.21 volts - when the batteries are still considered charged and are useful. 2. Standard size, including length. Some replacement batteries are a bit longer and may not fit your device's battery compartment. I have no negative comments, though only when the middle of fall 2025 approaches will I know if these batteries have lasted.

I cannot yet comment on their durability, however what you should know is they may not fit into all your devices. These batteries are slightly larger than standard (a common problem with many lithium batteries). No problem with my smoke detectors, but my VOM and stud finder are a no go.

Hoping these do the trick. I have a rental that really rents only during the summer season. After various types of smoke detector batteries, I am giving these a go. I do not want chirping in the middle of the night. Chirping equates to lost revenue. So let's hope these will do the trick and last.

Priced genuine lithium batteries at the store lately? They arn't giving them away are they. So what usually happens is you let your fingers do the walking through the internet yellow pages and eventually you end up on Amazon, you find exactly what you need and at an affordable price point so you don't have to take out a second mortage or sell the car to to buy genuine lithium batteries. The lights are on, but you're not home Your mind is not your own Your heart sweats, your body shakes Another Lithium battery is what it takes Whoa, you like to think that you're immune to the stuff, oh yeah It's closer to the truth to say you can't get enough You know you're gonna have to face it, you're addicted to lithium. Might as well face it your addicted to Lithium...

I have been using these batteries in my smoke detectors. They were installed on January 9, 2019 and one of my smoke detectors started to chirp on January 21,2024 (telling me to replace the battery). The other two weren't chirping but the one that was, goes off a lot when cooking so it could have lasted longer. I replaced them all, better safe than sorry. Five years out of a battery is pretty good and I test them every time the clocks change. For the price, these are excellent batteries and I highly recommend them.

I bought these Lithium batteries for smoke detectors around the house. Since I have a battery tester ( a real one not one that puts a small load on the battery and measures how much the voltage drops), I decided to measure the capacity compared to a top-of-the-line Alkaline battery. This test measures how long a battery will last while it is supplying power to a resistive load. The attached chart shows the result. The capacity of the batteries, measured in milliampere-hours is on the horizontal, x-axis scale, and voltage is on the y-axis. A 9V alkaline is supposed to have a capacity around 500 mA-hrs and that is what I found in my measurement. In contrast, this Li battery has a capacity of 1000 mA-hr (less than the 1200 mA-hr claimed but still quite decent). The price for these batteries is about twice the cost of first-rate, name brand alkaline units, but about four times that of the generic brands. So if it's a critical application, like a smoke detector on a 14 foot high ceiling(in my case), these might be worth the cost.

excellent