EasyFinder is the world’s first two-way smart battery that helps you locate your battery-powered electronics AND your smartphone with a push of the logo. Download the free companion smartphone App for iOS or Android and locate your remote, toys, controllers and more. On the flip side, if you ever misplace your smartphone, find an EasyFinder battery and push the logo to sound an alarm on your phone (even when its silent!). EasyFinder is currently made in AA and AAA sizes, with specialty sizes coming soon. You can also view the EasyFinder website.