Unless you compare it to a Garmin Vivosmart, which does notifications and lasts about 7 days. No GPS, but fully waterproof. Or if you compare it to the just-an

Unless you compare it to a Garmin Vivosmart, which does notifications and lasts about 7 days. No GPS, but fully waterproof. Or if you compare it to the just-announced but not yet available Fitbit Surge, which claims 5 days without GPS. Two days is not much time in this space.