I no longer have the boom box these were for. I tested all 16 with a multimeter and they all are 1.5V or higher. You can have them all for free if you want. For the record, I disposed of all the batteries that had lower voltage. These should all be usable. There are 10 Duracells and 6 Energizers. It seemed wrong to throw them all out when these 16 still have juice. Free if you can use them.