I ordered this two pack figuring it was brand-name so I would get good long-lasting batteries. The first one lasted less than a week. I put it in my digital thermometer when it arrived on Monday 11/13 and yesterday I had to replace it (11/18). I will hope that it was an exception and the other one will last longer. Right now I cannot recommend this purchase. I will update when I find out if the 2nd battery lasts longer.