I upgraded to firmware 19.20 and you should! Better battery life (6% drop after a 4 hour hike with GPS + Galileo + map from 8% after 2.5 hours GPS only with
Garmin Fenix 5,5S,5X Plus Series | Hi people, Fenix 5 plus, firmware version 8.40
Garmin Fenix 5/5S/5X Plus In-Depth Review (with Maps, Music, Payments) | DC Rainmaker
new Garmin Fenix & Edge firmware goodies - beta, SURPRISING/INTERESTING additions including PM5