Worked perfectly in my mothers car remote controlI used to have to buy cell batteries in packs of at least 5, often more, and it would cost at least $20 if I ever actually needed one, because cell batteries are products that I RARELY need (buy a pack, use one, the others sit on the shelf forever).I bought this for a remote control to my AC that I didn't even realize I had until I made it out sitting next to the unit covered in dust last month. AC remote - not exactly a necessity, so when it didnt work, I wasn't too eager to get a new battery to see if the remote was dead, or just the battery. No way I'm gonna spend $25 on a pack of batteries that I'll never use (except for the one), and then have the remote just be dead anyway.But, getting only one for $5 is a huge help, and this one may have been shipped in a box big enough to fit a small country for some reason (I guess the lithium in the battery requires it to be shipped with more careful packaging than just an envelope, which a cell battery can easily fit into), but it works fine. The remote works great with the new battery, so even though I obviously can't say how long it will last, I'm definitely satisfied to get this for such a low price.This review isn't really about the battery - it's great. It's more about the company that is selling these on Amazon. Best Deal Supply are selling these for nothing and they are shipping them for free. I was expecting to get what I paid for, and I was very happy to see that the product arrived in great shape. It's not old, the charge is fine, and the packaging was top-notch.The impressive part was that I contacted the seller to see where my product was since I felt like it should have been here by now. For an item that I paid a dollar and some change for I wasn't expecting anything from them, but I instead received extremely fast feedback. They helped me track down the package, and even followed up to ensure that I did get it and everything was fine. Let me remind you that I paid not even $2 for this product, and I got better service then some products that I have paid $60 for. It turns out that it was my local post office that was to blame, and not the seller - yet they never once tried to pass the buck.All in all, it's a battery and batteries do what they do. The reason you should buy this battery is that you are buying from a company that does't care about how little you have spent with them. They will treat you like a million bucks, and to me that is priceless.Make sure to order the correct thickness of these batteries! I wasn't aware of, until recently, that there are three different (or more?) thickness of these 3 Volt batteries. The numbers for these batteries are as follows:CR2016CR2025CR2032All of them have the same 3/4" diameter, and all of them are 3V batteries, BUT they have different thickness. The last two digit are (I'm assuming) the thickness in tenth of a millimeters. So they are 1.6mm, 2.5mm and 3.2mm thick. The later, I think, is the most common and the one I should've ordered. Most of the time you can use a CR2025 instead of a CR2032, but the CR2016 is most likely too thin (if you need the other one).Anyway, just wanted to help to avoid any confusion with these batteries! To double check which one you need, look at the CR20XX number on your old batterie. I guess some would say that's obvious, but it wasn't to me.It worked, like a battery should. Giving a 5 star review because I assume the only ones giving a review on a battery would be people that had a problem. I got the right battery I needed. Yay.so far works fine, put it in my 25 year old robic stopwatch/chronometer to tell me the mph indy cars are doing at the track. great price can't beat it here, cost more if you go to walgreens,cvs etc.Most batteries store chemical energy that can be converted into electrical energy. Well, the CR2025 is no different. It is a battery.My key fob ran out of battery energy and I didn't have a spare CR2025 just sitting around, so I ordered this one. I put it in the fob where the old battery was because it is a battery. Then it worked like a battery, providing energy for my key fob.Again, it's a battery.It is also circular in shape. The bedding for the battery in my key fob is also circular, so it was a natural fit.It also has the make and model inscribed on it.Is is also metallic and silver, so it reflects sunlight.I would've given this 5 stars, but it didn't last very long. HOWEVER, i do not know if the problem was the battery or my portable DVD player's remote control (which is what it's for. The remote control has an issue where a button sometimes gets stuck after pressing it).LO UTILICE PARA LA LLAVE DE MI CARRO Y CUMPLE SU FUNCIONlike