Only draw back is thickness size as CR2025 cells are loose in some holders. Duracell thicker. Does that mean energy lasts longer because more quantity of LED material?Batteries are a lot cheaper and last just as long as name brand batteries.The price was right. Even the expensive ones from Walmart really only lasted for about a week in my dogs underground fence collar. So even though they don't last I have plenty. One day they will come out with this type of battery that will last, but that day is not today and not these. Still they work and the price was right.Great deal, fast shipping.EXCELLENT PRODUCT! I have ordered on numerous occasions and there have been no issue! Batteries are fully charged and packing is exceptional...easy to open and protected. Great price too!Bought a few packages of these because the price was right. They are terrible, had customers coming back within a few months with fob battery warnings on the dash. Bought energizer brand this time.Great deal for price. And batteries have good charge duration. Highly reccomended.Some batteries in the pack were already dead before first use, but others were fully energized, while still others had some juice in them, but not all. As a locksmith, we test the batteries before selling them to our customers for their car remotes.Bought in Dec 2018. So 1.5 year ago.- It’s a pack of 5. I used two. Maybe they worked. I don’t remember- Today when I wanted to replace a battery, I found that all three remaining batteries, which until now were unopened, were dead, as indicated by battery tester. They have even lower voltage than the battery I’m trying to replaceIt’s weird enough to prompt me to dig out my amazon purchase to write a review and voice my extreme anguish, for I realized I had wasted my $2Bought these as an add-on item for free shipping and cuz I needed batteries for my car key fob. They barely worked when I got them and they're working less and less with each passing day. I'll be ordering name brand batteries now and a Snickers as an add-on cuz you're not you when your key fob doesn't workI bought those batteries to replace the car remote controls. I replaced all 3 of my cars and guess what the batteries didnt last even 2 weeks. Do not buyLasted a few hours in my heart rate monitor. They should last a few weeks minimum. Don't waste your money.These allow for a super bright light, however, don't last very long. 4 stars for the price and # of batteries. I just replace them a little more often.