10 Lithium Ion AA Batteries. I selected these by mistake. I thought they were ‘regular’ 1.5V Lithium Ion Non-rechargeable batteries. I got the Li-Ion and ‘non-rechargeable’ correct. But these are *not* regular 1.5 V AA. They are special purpose 3.6V batteries, just in the AA size. One would have thought that to avoid confusion on the part of muggles, they would make high voltage batteries a different size and/or shape. Top make these the same size as regular batteries is dangerous as they would surely damage many devices. This is no fault of the manufacturer— it is a standards issue. Anyway, I checked these batteries with a battery tester and they are indeed “off the scale” powerful. I will return so someone else can use them. Apparently they are good for water meters, gas meters etc.. I need to get better at reading the fine print. Hopefully this review will save others from a similar mistake.