Cr2032 Battery For Car Key

I run through a bunch of CR2032 batteries every couple of months. I like these because battery life has been good, and I can buy them at a reasonable price through B&H.

The RAYOVAC CR2032 Lithium Battery (2-Pack) contained two, count-em two CR2032 cells. Absolutely amazing!!. These were purchased as spares, so I have not measured their voltage yet. Presumably, they will produce the rated 3 Volts and will last for 190 to 240 mAh. They are 20 mm in diameter, shiny and light weight and most likely contains some lithium & manganese dioxide so are technically a LiMn02 cells. FYI: They can explode if heated to more than 80 deg. C.

It charges a battery using your car. Not much else to say.

This is perfect for my key chain and walking to my car late at night.

Wow, quite a powerful light for such a little-bitty flashlight. It's now on my car-key ring!

Been carrying for 5+ years - best wallet in the business. I use the little pocket to keep my car key fob...it sometimes falls out. Would be nice if it somehow had a "catch" or something on the upper lip to keep things inside.

Tiny but very convenient. The best flashlight you could have is the one which is always with you...! I added this to my car key, and the few days since this arrived, I went on 2 night walks, 1 dinner hosted in a remote area, with limited lighting. This little flashlight is so handy, and convenient. Just enough light to do the job!

Car remote key was running low. Seems to work fine and got here quick

I enclose my electric car key in the Keymaster and loop it to the inside of my wetsuit when I surf. The 'pac has endured some good use and remains dry on the inside with light submersion in water. It's seal is of two, heavy-duty, interlocking plastic pieces and the bag is of very thin yet durable plastic. It does fit an iPhone 4 without a case.

Great tiny little flashlight to put on your car key: key chain. You will not believe how bright this little light is! Just outstanding! You can also put one on a small carabiner, then attach it to a "D" ring on your camera big, or backpack!