1/2 AA Size LS 14250 ER14250 3.6 Volt 1200 mAh Lithium Batteries 4 Pack, Tyrone Batteries Compatible for Dogwatch Dog Collar and Some of Movement Monitor/Home Security System/Alarm System

Bought a pack of four batteries in October 2023 for a Fibaro FGK10X Z-Wave Door/Window Sensor with External Temperature Sensor mounted on our chest freezer. It reports internal freezer temperature & door open status. Just used the fourth battery the first of June 2026. This pack of batteries replaced a different brand I’d previously ordered that were DOA. No date code that I was able to see on either battery order, so it’s kind of difficult to say with certainty how “fresh” was either order. This brand appears to hold up well in our application—guessing about half a year before needing replacement. 5 stars, because they “just work,” although a “use by” date would add much more confidence one received fairly new stock!

Look, I don't know why I'm writing a review for batteries either. Yes, they work. Yes, they're 3.6 volts of pure lithium power, which sounds cool and vaguely dangerous. Yes, they are 1/2 AA size — a size that apparently exists and isn't just something your smoke detector made up out of spite. I popped one into a device I haven't touched since 2008, and guess what? It powered right up like it hadn’t been abandoned in a drawer for 15 years. So yeah, the batteries work fine. Congratulations, science. But let’s be honest: no one is reading battery reviews unless they’re: Already confused about what size they need, Distrusting the product because it’s not sold in blister packaging that requires power tools to open, or Just killing time while avoiding assembling IKEA furniture. So here I am. Telling you that these tiny, unreasonably powerful little cylinders are doing their job without complaint. They’re the kind of batteries that sit quietly in your CO2 detector or some obscure garage sensor, silently keeping you alive without asking for praise. Humble. Noble. Unscented. Pros: Work as advertised, which is rare in this economy. Come in a 4-pack, because buying just one battery would be weird and sad. Will probably still be working after society collapses. Cons: Not exciting. Like, at all. Zero fireworks. No personality. No LED display. No Bluetooth. Just... voltage. Writing this review has me questioning my life choices. Again. Final Verdict: ⭐️⭐️⭐️⭐️⭐️ – 5 volts — I mean, stars. They work. They’re batteries. What more do you want? A parade?

I bought these LS14250 / ER14250 3.6V lithium batteries for about $9.99 when my husband needed replacement batteries for one of his motion sensor devices he uses with his electronics setup. These are ½ AA size 3.6-volt lithium batteries, which are smaller than standard AA batteries and are typically used in specialty electronics like sensors and small electronic equipment. The batteries arrived well packaged with clear labeling. Installation was simple—just swap out the old battery and the device powered up immediately. So far they’ve worked reliably and held steady power, which is important for electronics that depend on consistent voltage. The 4-pack price is a good value compared with some name-brand versions that cost quite a bit more for the same type of battery. The only downside is these aren’t a common household battery, so they’re only useful if your device specifically requires LS14250 / ER14250 3.6V batteries, and they’re not rechargeable. Overall they worked well for our device and seem like a reliable, affordable replacement option for compatible electronics.

Revived prmomty and they appear to be correct but I purchased as reserves so I haven’t actually used one yet

So far, working great with my Eve door sensor that calls for 1 of these batteries. Time will tell if they last a while in my proper battery storage tray!

I bought a box of these batteries and the first 2 batteries installed in a Garage Door Opener Door Sensor. The first batteries lasted about a year and 2 months. I replaced them with 2 from the same box after the box sat in a climate controlled environment only to have those 2 batteries from the same box last not even a month. I replaced them again thinking maybe just a bad battery in the batch. The next two batteries lasted a week. When I went to replace those two I decided to put a volt meter on the remaining 4 batteries and they didn't even register on the volt meter after sitting in a battery case with other types of batteries for a year and half. These batteries were the only ones to die in the box in that case. I had regular AA, AAA, C, D and 123 batteries in the same case. These batteries were the only ones to die in the relatively short time for batteries in perfect environmental conditions. Most batteries have a much longer shelf life I would say of 5 years or longer, but 1 and 1/2 years is unsatisfactory. I cannot recomment these batteries from my own experience with them.

We use these batteries for our machine tool probes. My guys tell me they like these because they last significantly longer than some of the other brands, which are more expensive, that we have tried in the past. The 4-packs are a good value and don't age out before we use them. I can recommend them.

This 1/2 AA lithium Thionyl Chloride cell is exactly what I needed—high energy, dependable. I’ve used it in my home security system, and it’s been flawless. It’s also great for baby movement monitors like the Snuza Hero (non-SE models). An excellent investment for anyone who needs reliable, long-lasting backup power.