Black Friday 12.4 hours of mixed use (4850 + DBMD4 DSP) Battery, Approximately 100 (from full charge; number of prints depends on the usage conditions.) Approximately 1.5 to 2.0 hours (depending upon environment temperature at time of charging) Battery, Smartwatch: up to 16 days (7 days always-on); GPS only: up to 47 hours (37 hours always-on) Battery