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> Garmin has some models with solar charging and battery life up to a month Do you mean some models that are solar powered and others who have battery life up

• nradov 4y ago
  They have a bunch of different watches with varying battery capacities and with or without solar charging. The one I linked above could potentially run forever if you don't use the smart watch features much and expose it to a lot of sunlight. But realistically most of them can go for more than a week with normal use (including heart rate monitoring, phone notifications, GPS sports activity tracking, etc.).
• mastazi 4y ago
  not parent but Garmin has many solar watches, some of them could be used indefinitely without ever being recharged, depending on your lifestyle and how much time you spend out in the sun, e.g. https://www.garmin.com/en-US/p/775697 https://www.garmin.com/en-US/p/775697 But in other solar models, the energy consumption is greater than the energy produced, so the solar charging feature is just a way to extend battery life. In that case you will have an indication of how long the battery lasts, for example in this model it lasts 2 weeks https://www.garmin.com/en-US/p/702902 https://www.garmin.com/en-US/p/702902