SR44-1.5V by MITUTOYO - Buy or Repair at Radwell - Radwell.com
Pack of LR44 AG13 303 357 SR4415 Volt Premium Alkaline Button Cell Battery Use for Watches Clocks Remotes Games Controllers Toys Electronic Devices - Newegg.com
Exell Battery Silver-Oxide SR44 Button Batteries in the Coin & Button Batteries department at Lowes.com