Bests & Worsts Reviews from Amazon

A day or two after these batteries arrived, I installed several of them in toys and our small keyboard (which also has A/C power). The next morning, my son called me into the living room, "Mom! There's chocolate sauce all over the 'piano' and the table." It wasn't chocolate sauce. It was battery acid. As he said, "good thing I didn't taste it!" For what it's worth, the keyboard was plugged in, and it had not been turned on or played since the batteries were installed. The five new batteries were in place for about 18 hours before the leak was discovered. The green seal fell off of two of the five batteries as I removed them from the compartment. The acid left a 2" stain on my table. The other batteries that I installed that day still seem to be okay, although I've developed a paranoia about checking them! I have used Amazon batteries in the past with no problems, which is why I'm giving 2 stars, instead of 1. The attached photo shows the rings that fell off. (I wish I'd taken a photo of the puddle they left on the keyboard and table, but I was too focused on clean-up to stop and take a picture.) You'll also note that these batteries are darker in color than the product image that is currently shown. They came this way, and I'll use that difference to keep an eye on their performance/durability.