Duracell 389/390 Watch Battery (SR1130W) Silver Oxide 1.55V (1 PC). With a long-lasting charge that requires fewer recharges, Duracell Specialty and Rechargeable batteries really do set themselves apart from the rest.
Amazon.com: Energizer Batteries 390/389 (189, SR1130SW, SR1130W) Silver Oxide Watch Battery. On Tear Strip (Pack of 5) : Health & Household