(Updated June 2019) These hearing aid batteries are still "da bomb!". They are still working just like I described below - I am still averaging over 9 days per battery, so my FIVE STAR RATING???I'd give them more stars if I could! If you wear hearing aids, please, do yourself a favor and try these! SO MUCH LESS EXPENSIVE than those in drug/grocery stores, even "discount stores"... and they last longer!Questions? Feel free to ask! I'm a happy customer!!!!(ORIGINAL REVIEW - and it is all STILL TRUE!!!!!)I have worn hearing aids for over half my life. Buying hearing aid (HA) batteries is a never-ending endeavor. /I've bought them from my audiologist's office but they are SO expensive, yet I require them in order to interact with my world. I've purchased them from my local drug store before in a pinch, and unless you can catch them on sale, again, SO expensive.A few months ago my husband bought some regular AmazonBasics batteries (AA, AAA, etc) and they lasted well, so I thought, "Why not?".My question now is "Why did I wait so long to try these???".My regular name brand batteries from the drug store or my audiologist last me exactly 7 days - rarely one might last 8 days. I just had to change one of my HA Batteries today. The last time I put one in was 10 days ago.... TEN. That's three days longer than the ones sitting in the drug store or audiologist's office shelves. The other battery (as I wear two aids, one in each ear) seems to still be going for me... but I'm thrilled with 10 days!These batteries are packaged in a little box that fits in my hand (pictures), and there are 10 packages of 6 (size 312) batteries. Other brands of batteries that are size 312 are color-coded with a brown header on the card holding the 6( or 8 or 12) batteries and peel off tabs on the back of the battery - these are color-coded in exactly the same way.Note: in case you didn't know, the peel-off tabs must not be removed until you are going to place them in your HA. Once the tab is removed the battery is activated. If you leave your batteries in a hot car, and the adhesive evaporates due to the heat, your batteries could be prematurely activated and go bad before you actually get to use them in your HA! Hearing Aids have an expiration date (these that I purchased recently are good through 11/2020).Y'all - I paid less than $14 for SIXTY hearing aid batteries. That's less than a QUARTER per battery!!!!! And it was delivered free with Prime! I didn't have to get dressed and drive into town to the store, mess with expiration dates, long lines to check out.... nope, nope, nope!I have spent as much as a DOLLAR PER BATTERY at the drug store !!!!!! The ones at my audiologist's office were less than that (about 80 cents per battery).Will I purchase these again?Ohhhhh, yeah! For sure I will! I'd be crazy not to!My purpose in reviewing this and other items is only to provide my honest opinion based on my experience with the item. Therefore, the opinions expressed herein are my own, based on my personal experience with this product and my perceived utility of the product as well as its value for the cost. Also, note that I will not downrate a seller because of my personal difficulty using an item unless it is directly related to something they are directly responsible for, such as their instructions, lack thereof, or manufacturing or packaging errors.If you have any questions regarding my review, please do ask, and if my review is helpful to you, please consider letting me know by using the voting buttons at the end of the review. Have a blessed day!