File:LR44 Button Cell Battery IEC Standard Version.jpg - Wikimedia Commons
Multi-Pack EBC Battery LR44 AG13 Premium Alkaline 1.5 Volt Non Rechargeable Round Button Cell Batteries for Watches Clocks Remotes Games Controllers Toys & Electronic Devices (24 Pack) - Walmart.com
Amazon.com: AmVolt- Pack of 15 LR44 Batteries AG13A76 Battery, Premium Alkaline Ultra Power Non Rechargeable Button Battery, 1.5 Volt Small Batteries for Remotes Games Controllers Toys & Electronic Devices : Health & Household