So far so good with battery life.

New batteries lasted less than 2 hours in a new toy

Just purchased a pack of these batteries for various items around the house. However, the most important one being my bp machine. I removed the old batteries and put in all new MM batteries. Didn't need it at the time, so placed it to the side. Fast forward a week later and I go to take my bp and the machine wont even turn on. I replaced the "new" batteries with another set from the pack and nothing. I figured the machine had finally ran it's course after 4 years. But then I decided to put in the previous batteries and the machine started up displaying low battery, but functional none-the-less! So I replaced all the old batteries with different "new" batteries from MM and return to blank screen. So I got a big package of dead batteries that I now have to return! Maybe it was just a fluke, but when I return them I am going to get me a trusted brand. Which is what I should of did initially.

Right after I bought these batteries, I put them in a clock and noticed that the clock was running slowly. After testing them in a battery tester, I found that the charge was not 100% but borderline yellow vs green on the chart. These batteries are worthless.

Two things, first they don’t last as long as other batteries, and when I put them in a thermometer after a while, it would not work. I checked the voltage with a volt meter and it showed proper voltage and current, but would not work until I put another brand in it. Also, they started leaking after a while.

We've used Members Mark (MM) batteries for many years without any problems. They've always performed/lasted better than other generic brands until now. The last two packs we purchased didn't even last half as long as they have in the past. We've always gotten a good 3 weeks out of our LED Christmas lights. This year we had to change the batteries 3 times just to get from Thanksgiving thru Christmas, and they they showed noticable dimming after only the first day or two. I tested several with a battery tester, which showed them to be full. So, I'm at a loss as to what's changed, but we will likely not trust Sam's Club MM batteries again, at least for a long, long time. Even the very cheapest dollar store batteries last longer than these do now.

I purchased these batteries for use in my trail cameras this fall. I've had multiple batteries bulge and almost burst inside the camera. I'm not sure if it's the temperature changes or power usage of the camera, but it's happened in multiple cameras that never had issues with other battery brands.

We use these batteries in our smoke detectors, temperature sensors, etc. Lasting for up to 6 months has not been an issue. Priced right.

Had them delivered and had great service. These batteries are better than the normal brand name batteries. Preparing for hurricane season

Excellent batteries. I am disappointed, however, in your new policy to charge shipping costs to plus members for purchases of less than $50.