Expiration date on batteries is Dec. 2025. The two in my Microsoft mouse made a strange spirting noise and leaked battery acid all inside the mouse. Mouse now has problems and had to replace. Going to use another brand instead.
I had bought a large package of 20 double AA from lowes about 6-7 months ago.My wife wanted to buy the cheaper brand that was there but I insisted on these because of the reputation of good quality. Sorry to say that out of 20 batteries 8 of them leaked into our remotes, We have no idea why, I do know the less costly brand didn't leak but did not last as long as Duracell,The whole reason why I went with these. I had to take my Dremel tool with the wire wheel to clean out all the white junk. Nothing wrong with the remotes luckily. I would have put up pictures of this I just noticed that was add photos and this happened about 2 months ago and threw out the batteries.
DO NOT leave these batteries in any device you care to save for over a week. I've had pocket voltage testers (Greenlee), hand held laser temp probes (Milkaukee), and my sons hand held electronic games all ruined by the Copper Top battery. These batteries were not used past the due date stated on the battery. On the other hand the Energizer I've had good luck with when I need a throw away battery. Now I use rechargeable almost all the time. And most certainly I would never use the CopperTop battery in any smoke detecter. OMG it scares me to think of lost lives due to these batteries. So you asked and here is my honest review. Eneloop batteries are great rechargeables. Energy and Energizer are my next choices. Thank You. Mr. C Stiles
In the last 5 years, I've had numerous Duracell AA and AAA batteries leak and damage the contacts of the devices they were in.
All devices were in constant (clocks) or daily use when the leakage occurred. I used to buy Duracells because they never leaked (other brands often did) but that is no longer the case.
Now I buy the cheap batteries and change them once a year whether they need it or not. I'm also buying Lithium-Ion batteries for high-value products that I can't afford to have damages.
I buy the bulk back of batteries at a box stored, however, I find that some go bad before I can use them even though the date to use them buy is 2023! The store will not do anything about it, but this happens often enough that the batteries are becoming expensive. I am going to research batteries for another brand.
Another double A battery leaked. This time the mess is worse. I cannot afford to use your batteries. I guess since only one of the two leaked, only fifty percent were leaking.
I just opened my wireless Apple Mouse to change the batteries and discovered that the batteries had leaked significantly. I've never seen a battery leak this much and the batteries are still within the best before date. I also recently changed the Duracell batteries in my Keyless door lock and they had also leaked slightly. While I haven’t used the Apple mouse for several months this shouldn’t happen. I haven’t tried the mouse yet so hopefully it hasn’t been damaged by the excessive battery acid.