I order these for my 95 year old mother. Delivery is very quick. She finds the long tab on these easier to use than the ones with shorter tabs. I guess the battery life is acceptable. She changes the batteries every Thursday morning, so I don’t really know if they last longer than a week. She won’t try any other brand, she likes what she likes.batterys only last one weekgood productGood battery. Battery life is good for this size of battery.Much better life than Eveready.Great valueLongevity of some batteries are bad.Some works for few days but others few hours.Long tail made easy changingMit Batterien funktionieren meine Hörgeräte viel besser!Spaß bei Seite. Mein Hörgeräteakustiker benutzt diese Batterien auch.Kleiner Tipp: Da die Hörgeräte meistens unterschiedlich laut eingestellt sind haben sie auch unterschiedlichen Stromverbrauch. Das hat zur Folge dass eine der Batterien immer schneller leer wird. Wenn man täglich die Batterien gegeneinander tauscht hat man länger davon weil sie gleichmäßig entladen werden.I am amazed that these made such a difference to the clarity on my hearing aids. I was given Hearing Aids and free batteries on the NHS and was told it would take weeks to get used to them. I perservered with them using the free batteries for over 6 months and just couldnt wear them for more than an hour or two at the most because there was always a slight rustling and white noise in the background making me feel quite queasy at times. I was down to my last pair when I sent for these as although I could have got replacements free on the NHS from doctors or hospital I just couldnt be bothered with the hassle of asking for them. Any way I ordered these and when they arrived decided to try them straight away in case they were the wrong size. What a difference to the quality of sounds I experienced straight away so clear and I dont even notice I am wearing them now and am able to wear them all day. I would recommend these batteries to anyone who is using the free ones as am sure you will notice the difference straight away.These last a long time as you'd expect from Duracell, and the bulk purchase means that they represent value for money. However the packaging could be better and more environmentally friendly, especially when you consider that typically more senior members of society will be using this item. The tabs to insert the batteries are a welcome addition.Complete waste of money1. after activating they never show more than 75% capacity in a fresh battery/cell.2. With few exceptions most have not lasted more than 36hrs3 I am very prematurely, on the last box of the “10box” pack I bought from Amazon ( 60 cells )4. Using my hearing aids , on average 13 hrs per day, of the 52 of 60 cells I have used so far, , the worst cell drained after 18 hrs and the best was a single cell that lasted 43hrs.The majority were exhausted after 22hrsThis means that these cells last typically about 12 hrs less than Rayovac or other makes I have tried.6. I informed Amazon and Duracell of this situation but didn’t get a peep out of either.This product is very, very poor and not worth the money being even outshone by Amazon Basics 312’sI am perfectly happy with the batteries themselves and would give 5 stars for them.The plastic box is bigger than it needs to be and that is a nuisance, since it needs to go in my handbag. If it is necessary to have such a big box? If it IS necessary to have such big box, there is sufficient room inside for two more batteries, which would be better use of the space. I would be best pleased with a smaller box, but if it HAS to be so big it would suit me better if it carried four pairs rather than only three.