O order a small pack of Duracell D303/307 battaries for a calculator. Price was very inexpensive and the package arrived on time. Unfortunatley the battaries were dead. I went to local durgstore bought a package of the same batteries and the calculator worked fine. The seller invoice asked that I contact them with any issue before contacting Amazon but the invoice had no phone number or email. That indicated to me they were not interested in hearing my complaint.