Hello
I've bought a Fenix 5 Plus second hand (no warranty) and I 'd like to share some thoughts about battery life. Important to note that the previous owner told me that even when new "he needed to charge the watch every 3 days".
My tests: Battery drain in Activity mode (GPS+OHR+BT) is approx 7-8% per hour => ~14 hours endurance, OK for an older watch as it has 19h endurance when new
Battery drain during the smartwatch mode / Stanby OHR+BT is approx 1.2 % /h => overall needs to be charged every 2-3 days... Stamina seemed kind of low so I have tried the following things
- soft resets - no change
- avoid installing 3rd party watch faces / widgets - no big change
- multiple hard reset - no change
- master reset - no change
- upgrade / downgrade firmware - no change
- installed current firmware (15.4) and reinstalled with Webupdater - no change
- run the watch with OHR disabled, BT disabled,etc - no significant change
- disabled Wifi auto update (when enabled battery drain is ~2% / h)
- cleaned connector - no change
- deleted all folders from Garmin folder to avoid corruption issues - no change
- exchanged the battery with a new 3rd party battery (230 mh) - kind of an extreme measure but I admit I like tinkering with this watch.
End result: same lifetime unchanged : ~14 hours activity GPS+OHR (OK), max 3 days "Smartwatch" mode (OKish).
Overall it seems that my watch is one of those batches of watches which had a reduced endurance from the start. However if anybody has any other ideeas on things to try in order to improve endurance please let me know and I will give it a go.
Thanks
