PKCELL ER14250 1/2AA 3.6V Lithium Battery,1200mAh Batteries Compatible for Dog Collar Meter Sensor Movement Monitor Home Security System Alarm System (10-Count)

These batteries are great. They definitely have a long life, not sure about the shelf life, but I’ll keep one and update in a year if it still works!

The PKCELL ER14250 1/2AA 3.6V Lithium Batteries provide reliable power for a variety of devices. With a capacity of 1200mAh, these disposable batteries are long-lasting and compatible with dog collars, meter sensors, movement monitors, and home security systems. I have found that they deliver consistent performance and are designed to handle high power requirement devices. If you need a dependable and durable battery for your electronic devices, the PKCELL ER14250 is an excellent choice.

My radon mitigation alarm battery lasted years with its included Ramway battery and this PKcell caused a low battery alert in a week. They all show 3.66v (as did the 3 year old Ramway, as is the nature of these batteries' chemistry) so the only way to determine what happened is to test the battery under load with a 5v LED or something in line. With the 5v LED load, the new PKcell shows 3.65v, the 1 week old PKcell shows 3.59v and the years old Ramway shows 3.61vMy guess is my radon mitigation alarm alerts you if the voltage is a hair below 3.65v, and while that is admittedly picky, what I researched about the cell chemistry of ER14500 (LiCoSL2) is it should output a consistent voltage across a long timescale under load, and the Ramway did this for years and the PKcell didn't even do this for a week.

2 of the first 4 from this pack of 10 were DOA, and so far, I'm effectively paying double for these since I only needed 2 at the moment. This is about on par with the green and black label brand with a man's name for this same type of battery which I've used previously, and is why I switched, hoping for a box of batteries that *all* work. Will look elsewhere next time.

For those who aren't as familiar with batteries as I am, this particular battery belongs to a specialized subset of lithium batteries based on lithium-thionyl chloride (Li-SOCl2) technology. This technology provides several advantages: a higher operating voltage (3.6v compared to the standard 3v for regular lithium batteries), a high minimum voltage during pulsing which allows it to last longer in devices requiring bursts of power, and lower self-discharge rates, making them long-lasting both in storage and when used in devices.A great feature of these batteries is their ability to deliver consistent and reliable voltage even in extreme temperatures, be it very hot or very cold. This makes them popular choices for outdoor applications such as outdoor security cameras and dog collars. Additionally, they are sometimes used in electronics to maintain volatile memory when the device is turned off.I acquired these batteries specifically for my old Polaroid pack film cameras, which I use infrequently. I wanted to avoid the inconvenience of dealing with dead or leaking alkaline batteries when I decided to use the camera. These batteries meet the shutter's voltage requirements, needing at least three volts and up to four volts, making them ideal for this application.In terms of appearance, these batteries resemble a smaller version of a CR2 battery. In fact, with the use of some shims and a conductive spacer, they can even be used as a substitute for a CR2 battery, provided that the device can handle the slightly higher voltage.While these batteries can be on the pricier side, it's encouraging to see their prices gradually decrease as more manufacturers enter the market. Overall, I am quite satisfied with the performance, reliability, and price point of these batteries.

These batteries are used in Eve Door and Window sensors. I got them to have on hand for replacements, which I seem to need every 6-9 months. I just replace them all when one goes. I haven't had these long enough yet to comment on durability.

The PKCELL ER14250 1/2AA 3.6V Lithium Battery is a pack containing 20 batteries, each with a capacity of 1200mAh. These batteries are compatible with a range of devices such as dog collars, meters, sensors, movement monitors, home security systems, and alarm systems. They offer reliable power for these applications, making them suitable for long-term use in various electronic devices.