I’ve used Energizer MAX Alkaline 9V batteries in smoke detectors and other household devices, and they deliver consistent voltage and dependable functionality. Capacity feels solid, with long runtimes before needing replacement. The weight is standard for a 9V and fits securely in devices without looseness. Overall performance is stable, reliable, and exactly what I expect from Energizer.

I’ve used Energizer MAX 9V batteries in smoke alarms and a few other devices, and they’ve been really dependable. They last a long time, which is nice because changing 9V batteries is something you don’t want to do often. I haven’t had any issues with them dying suddenly or not working when I need them. Even ones that have been sitting in a drawer for a while still work fine. They do cost a bit more than some cheaper brands, but I think it’s worth it for something you can rely on, especially for safety devices. Overall, they’re simple, reliable, and do exactly what you expect without any hassle.

Just replaced several Energizer 2430 batteries in our house! Also replaced the 9V in our smoke alarms!! Something about those Energizer bunny commercials got me hooked - I love that I can count on them to be top quality, don’t have issues with quality or leakage and are fairly priced.

The Eternal Flame of Tiny Power” Let me tell you about this Energizer 9V battery — the Chuck Norris of electricity. I bought one in 2008 for a smoke detector. That smoke detector has since witnessed three apartments, two breakups, one existential crisis, and a mysterious incident involving microwave popcorn and regret. The battery? Still going. Probably judging me. Last week, my friend’s Bluetooth speaker died mid-party. I pulled this battery out of my smoke alarm like a defibrillator in a medical drama, snapped it in, and boom — instant resurrection. I’m convinced these things aren’t powered by chemicals — they’re fueled by pure spite and determination. If the apocalypse comes, the only survivors will be cockroaches and 9V Energizers. 10/10 would trust to power my smoke alarm, my hopes, and maybe my next relationship.