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.
1.55V Silver Oxide Watch Battery Sr44/Sr43/Sr58/Sr54/Sr57/Sr69/Sr48/Sr66/Sr41 - China Button Battery and Battery price | Made-in-China.com