My DMM is radioshack branded. I went to 2 radioshack stored to find the battery, as it said it was available there, and NEITHER had the battery. So i am going to radioshack to return it in about 10 minutes. It was $20. Then i will be off to FRYS electronics to get theirs, which is half the price, @ $10, and uses a 9 volt or a 1.5v. So. Im happy.