[BetterBatteryStats] timg11:
About 6 months ago my Note 4 suddenly lost half its battery life. No new applications were installed at that time, but there was a "security update". I've replaced the battery twice, but the significantly reduced battery life continues.

I purchased BetterBatteryStats to help understand what's going on.

The only thing that caught my attention is Wi-Fi On and Wi-Fi running are both 100%. Is that typical? If not, what settings control it?

I have "Keep Wi-Fi on during sleep" set to "only when plugged in", and "Always allow scanning" is unchecked.

Also I noticed that the log says "Root perms: false", but this phone has systemless root.

Dump File Unplugged to Current - approx 6 hours

/*
===================
General Information
===================
BetterBatteryStats version: 2.4-265
Creation Date: 2018-11-25 13:14:22
Statistic Type: Unplugged to Current
Since 6 h 42 m 5 s
Note:
VERSION.RELEASE: 5.1.1
BRAND: samsung
DEVICE: trltetmo
MANUFACTURER: samsung
MODEL: SM-N910T
OS.VERSION: 3.10.40-6209177
BOOTLOADER: N910TUVU2DOK2
HARDWARE: qcom
FINGERPRINT: samsung/trltetmo/trltetmo:5.1.1/LMY47X/N910TUVU2DOK2:user/release-keys
ID: LMY47X
TAGS: release-keys
USER: dpi
PRODUCT: trltetmo
RADIO: N910TUVU2DOK2
Root perms: false
SELinux Policy: Enforcing
BATTERY_STATS permission granted: true
XPosed BATTERY_STATS module enabled: false
============
Battery Info
============
Level lost [%]: Bat.: -19%(100% to 81%) [2.8%/h]
Voltage lost [mV]: (4348-4072) [41.2%/h]
===========
Other Usage
===========
Deep Sleep (): 4 h 40 m 27 s 69.7%
Awake (Screen Off) (): 1 h 48 m 59 s 27.1%
Screen On (): 12 m 41 s 3.2%
[COLOR="Red"]Wifi On (): 6 h 42 m 8 s 100.0%
Wifi Running (): 6 h 42 m 8 s 100.0%[/COLOR]
Doze Interactive Time (): 12 m 36 s 3.1%
Sync (): 2 m 18 s 0.6%
No Data Connection (): 2 h 20 m 14 s 34.9%
No or Unknown Signal (): 0.0%
Poor Signal (): 20 m 36 s 5.1%
Moderate Signal (): 27 m 45 s 6.9%
Good Signal (): 2 h 25 m 56 s 36.3%
Great Signal (): 1 h 53 m 42 s 28.3%
Screen dark (): 8 s 0.0%
Screen dimmed (): 6 m 2 s 1.5%
Screen medium (): 3 m 26 s 0.9%
Screen light (): 2 m 42 s 0.7%
Screen bright (): 21 s 0.1%
======================================================
Wakelocks
======================================================
SmartManager Framework Thread (Android System): 26 m 3 s Count:1869 6.5%
bluedroid_timer (com.android.bluetooth.Bluetooth): 10 m 46 s Count:215 2.7%
PollService wakeLockAcquire (com.fsck.k9.K-9 Mail): 5 m 28 s Count:150 1.4%
NlpWakeLock (Google Services): 5 m 10 s Count:4535 1.3%
Tasker.UserAbsentWakelock (net.dinglisch.android.tasker.Tasker): 4 m 7 s Count:78 1.0%
SyncEngineService (com.ninefolders.hd3.Nine): 3 m 22 s Count:65 0.8%
*alarm* (Android System): 1 m 37 s Count:944 0.4%
NlpWakeLock (com.google.android.googlequicksearchbox.Google): 1 m 27 s Count:766 0.4%
Icing (com.google.android.apps.messaging.Messages): 1 m 13 s Count:28 0.3%
bugle_datamodel_executor_wakelock (com.google.android.apps.messaging.Messages): 1 m 11 s Count:54 0.3%

<------snip - wakelocks less than 1 minute deleted------------>

================
Kernel Wakelocks
================
=========
Processes
=========
system (Android System): Uid: 1000 Sys: 12 m 49 s Us: 43 m 17 s Starts: 0
com.getpebble.android.basalt:framework (com.getpebble.android.basalt.Pebble): Uid: 10249 Sys: 4 m 28 s Us: 7 m 9 s Starts: 0
com.aa.android (com.aa.android.American Airlines): Uid: 10281 Sys: 2 m 6 s Us: 4 m 25 s Starts: 6
*wakelock* (com.android.bluetooth.Bluetooth): Uid: 1002 Sys: 2 m 31 s Us: 3 m 45 s Starts: 0
surfaceflinger (Android System): Uid: 1000 Sys: 2 m 42 s Us: 1 m 50 s Starts: 0
com.google.android.gms.persistent (Google Services): Uid: 10017 Sys: 1 m 7 s Us: 3 m Starts: 0
*wakelock* (Google Services): Uid: 10017 Sys: 1 m 40 s Us: 2 m 20 s Starts: 0

<------snip - processes less than 1 minute deleted------------>

======================
Network
======================
10102 (Wifi) (com.android.chrome.Chrome): 5.0 MBytes 30.6%
10073 (Wifi) (com.google.android.googlequicksearchbox.Google): 2.0 MBytes 14.4%
10269 (Mobile) (com.fsck.k9.K-9 Mail): 1.0 MBytes 6.9%
10017 (Mobile) (Google Services): 1.0 MBytes 6.8%
10073 (Mobile) (com.google.android.googlequicksearchbox.Google): 1.0 MBytes 6.7%
10256 (Mobile) (com.nstudio.weatherhere.NOAA Weather): 996.0 KBytes 5.8%
10269 (Wifi) (com.fsck.k9.K-9 Mail): 789.0 KBytes 4.6%
10257 (Mobile) (com.ninefolders.hd3.Nine): 672.0 KBytes 3.9%
10017 (Wifi) (Google Services): 558.0 KBytes 3.3%
10257 (Wifi) (com.ninefolders.hd3.Nine): 501.0 KBytes 2.9%
1000 (Mobile) (Android System): 312.0 KBytes 1.8%
10036 (Mobile) (com.android.vending.Google Play Store): 248.0 KBytes 1.5%
10256 (Wifi) (com.nstudio.weatherhere.NOAA Weather): 243.0 KBytes 1.4%
10212 (Mobile) (com.sec.android.daemonapp.Unified Daemon): 192.0 KBytes 1.1%

<------snip - network less than 1% deleted------------>

Additional parts of log are available if needed. (14K lines.....)