Amazon.com: Key Fob Battery Replacement Compatible with Toyota Rav4 (2013-2021 Rav4 Smart Key Battery CR2032) : Automotive
Amazon.com: Key Fob Shell fits 2012-2017 Toyota Camry / 2014-2017 Toyota Corolla RAV4 Highlander Keyless Entry Remote Case & Pad (HYQ12BDM), Set of 2 : Automotive
Car Key Fob Battery Replacement - iFixit Repair Guide