Duracell Coppertop 9V Alkaline Battery 1 Each

I've used Duracell for years. Last year the one in my keyless garage door opener died after 8 years of service. So I purchased and installed a 9V Duracell Duralock in September of 2012. Today, it died and I was locked out after dropping off my car for repair. Later, on checking with a voltmeter, the battery read near zero. I checked the last one from the same package and it read well over 9V. I put it in and the opener now works. But I wonder for how long. And I have a couple in smoke detectors. A single failure (never before with Duracell)? Or a pattern. Other reviews make it look like a pattern. I will reconsider my commitment to Duracell.

Duracell used to be our battery of choice, even paying more for them. In the last year or so, we've had at least 8 instances of new batteries corroding and leaking all over our devices. We lost a NEW big LED flashlight because there was so much leakage we couldn't clean it all out and make it useable. We didn't even get a chance to use the flashlight, just loaded it and set it aside for almost a month when we bought it. I found another leakage in a battery just this morning - it says 2015 for the date. This is unacceptable. What 's happened to your product? They used to be so reliable, but I'm becoming afraid to use them - I don't want to lose more devices. I keep checking them (and we have a lot of battery powered devices - using from AAA to D's) - we're seriously thinking of not buying this brand anymore since the quality has dropped dramatically. Please fix whatever you changed because IT'S NOT WORKING!!!

I have always thought Duracell batteries were among the best I could buy, so would often spend a bit more and get them. Recently I have had two instances of Duracell Coppertop batteries leaking. In one case, I was able to clean up the device well enough to have it work again. In the other case, it destroyed a $25.00 flashlight. This is not the quality Duracell is known for. From the other reviews, I am seeing a pattern. Please correct this!

Hi I am doing a science project for school on the longest lasting battery. I am testing Duracell Coppertop, Energizer Ultimate Lithium, Eveready SUPER HEAVY DUTY, and Panasonic batteries. Congradulations, because Duracell Coppertop is shining the brightest so far. The others are slowly dying, but your brand is strong and is persevering the constant running of the flashlight.

This product leaked and destroyed a 300 dollar electronic flash unit. The date on the battery was 2016 (leak occurred in 2011). These batteries were never even used. They were inserted in the flash, the flash was tested, turned off and stored. Two months later the Nikon sb 600 is useless. I can't recommend these batteries for use in anything but a throw away product.