Sprint's Marshmallow update killed my battery life!

[RocketFoot]

I got the Android 6.0 update about 2 weeks ago and I haven't had a good battery day since! Before the update, I could go from 4:30am until 9:00pm with 15%-20% left! Now, I can't make to 6:00pm without recharging! I have closed all excess apps, cleared caches, rebooted...you name it, I have tried it! I have not added any new apps or changed my usage habits since the update.

The culprits seem to be
Android System: 34.2%
Bluetooth System: 10.8%
Kernel: 8.8%
System (logd): 6.0%

Everything else is 1% or less...

Anyone have any ideas on how to bring my battery life back? It's only 3 hours less but from 6-9pm is prime time usage for me.

 

[1901Madison]

Have you tried a factory reset? Those can be helpful after a major software upgrade.