These silver oxide 397 button cells are used extensively in calculators, watches, etc due to its stable discharge characteristics. Also known as: D396/397, 607, 280-28, N, SB-AL, SG2, SR59, SR59L, SR726, SP397, SR726SW, V397, 536, S30, 1164SO. Dimension: H - 2.6mm x D - 7.9mm.