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: PKCELL LR54 AG10 LR1130 389 Alkaline LED Light Batteries 100pcs : Health & Household
V303, SR44SW
Batteries: 389A - BATTERY 1.55V from Dönberg - US$ Site