CR1220 3V Lithium Coin Cell Watch Batteries 20-Pack - Long Lasting Power for Thermometers, Calculators, Key Fobs & Small Electronics | Reliable Replacement Battery for Medical Devices, Watches and More

These are a nice deal. I bought for my hand held magnifyer and will update when I know more about the time it lasts.Good price for the batteries!!The batteries I have used so far all tested good and have been used for 3 straight days 24 hours a day with Christmas lights. You can't beat the price and they seem to be a good product. I will buying more.Great buyTiny batteries powered an led holiday necklace all night.Great number of batteries for the price!Opened 2 of 20 batteries, both showing full charge and proper milliamp (40). Exp date of 2024 in packaging. I didn't rate longevity as of yet but will after 2 complete cycles. These batteries are being used in LED body strobe on emergency gear using 2 batteries stacked. **Update to come**As a preliminary review I would recommend buying these batteries as they are fresh and as described by manufacturer.I used these to replace many different things. They worked great for light up Christmas necklaces.