According to Garmin, the new solar Instinct boasts up to 24 days in smartwatch mode while worn indoors, and more than 50 days with sufficient solar exposure. I haven’t had my solar Instinct long enough to test this, but in theory, its battery life is unlimited if your watch gets enough sunshine while in Battery Saver mode.
Garmin Instinct 2S Solar Review: My Favorite Fitness Tracker
Garmin Instinct® 2 Solar
Garmin Instinct Solar Review: What's New & Different
Garmin Instinct® 2X Solar - Tactical Edition
Garmin Instinct 2 Solar review: Rugged, colorful, long lasting, and fit for all
Garmin Instinct® 2X Solar - Tactical Edition
Garmin expands solar charging technology to popular adventure smartwatches - Garmin Newsroom
Garmin Instinct Solar Review: What's New & Different
Garmin announces Instinct 2X Solar rugged smartwatches
Garmin Instinct 2X Solar In-Depth Review: Bigger and Flashlight-Equipped!
Bold, rugged GPS smartwatch is built to US military standard 810 for thermal, shock and water resistance — with a large solar-charged display and
Garmin Instinct 2X Solar, Rugged GPS Smartwatch, Built-in Flashlight, Solar Charging Capability, Multi-Band GNSS, Graphite
Garmin Instinct, Rugged Outdoor Smartwatch with Solar Charging Capabilities and Tactical Features, Built-in Sports Apps and Health Monitoring, Moss Green : Electronics
Garmin Instinct Solar review: best battery under the sun - Wareable