What battery do I need for my Viiiiva Heart Rate Monitor? January 26, 2022 22:24 Updated The Viiiiva Heart Rate Monitor requires a standard CR2032 Lithium-ion coin cell battery. Related articles Viiiiva User Manual Why can't I pair my Viiiiva? It does not show up in the app scan list. Changing Your PRECISION Battery How do I know which Viiiiva is mine when I'm in a group? Troubleshoot firmware updates