Battery draining quickly

Battery capacity may be lost.

Morning.  i have had similar problem with my garmin after the latest update.  battery drains completely after 2-3 of just wearing and 50% or so after an activity even if the activity doesn't include use of the GPS.  before update it was giving me 8-10 days of battery with 6+ days of tracked activities of about 1 hour on each activity. Cant understand how from one day to the next the battery capacity would be lost when the only thing different is the update.  i can accept it slowly loosing capacity which happened on my 45 and this one used to give me 14 days of active tracking.  But this is unusual.