Energizer Speciality Battery (ECR2450BP)

I'm not sure if the battery worked. I purchased the wrong one because I was too lazy to drive home and check. The price was a little over priced because I found them some where else in the right size I needed. I'm still holding on to this in case I ever need it. Make sure to check your size before you buy as they have different thicknesses but same diameters. Most stores have this little thing that you can poke the battery into if you are unsure and it double checks the size of these flat batteries.

There were tons of available options on Amazon (2 pack, 6 pack, 100 pack!) some a lot cheaper than these. However after reading many 1 star reviews stating the batteries were often DOA or not packaged as advertised, I figured I'd pay full price (little dissappointed not multi-pack available since these are for my alarm system and need to be changed out frequently). But, I guess you get what you pay for (I hope)!

I bought 2 sets of batteries, because the 2 car-keys of my car required new batteries. I changed both and when I inserted the first key, the display still said "battery low". The second key was ok. So I don't know if one of the new batteries have been empty... The price for the batteries was too high as wel.