Amazon.com: Duracell 389/390 Silver Oxide Button Battery, 1 Count Pack, 389/ 390 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More : Health & Household
What is a 390 battery equivalent?
TYT 3600mAh battery for TYT 390/680D/8200 series
Amazon.com: Silver Oxide Button Cell Battery 390 by Renata : Health & Household
Renata Watch Battery 390 - Walmart.com
7.4V 2200MAh Battery for TYT MD-390 [DISCONTINUED]– Radioddity