100% battery to 4% battery overnight in 3.5 hours. Then back to normal.

[Clove6060]

Not sure what happened last night but my abnormally strong battery went from 100% at 9:30 p.m. (just charged) to 4% (and non-responsive) at 12:30 a.m.  This has never happened before. I normally get 20% drain in 24 hours since put in service back on Nov 3rd 

2020.  I charged it back up to 100% and it is functioning. I’ll report back later the battery usage 

on this charge.  Just really odd. Anyone else have a unusually quick battery drain 1 night and it back to normal afterwards? 

[mjdmaine]

I had the same thing happen after an update and I enabled snore detection a while back. I disabled snore detection and my Sense returned to normal battery usage - about 4 - 5 days between charges.

[NellyG]

Hi @Clove6060   I haven't come across this with my Sense, but my old Flex 2 did it one day when it was quite new. I restarted it a couple of times and fully charged it and it never happened again, with no battery issues that I could see for the rest of its life. I hope your Sense recovers too.

[eezeepee]

@Clove6060 Wow that's a crazy fast drain. I can't even do that with an outdoor GPS workout. I do have the latest updated and opted for the AFib detection a few days ago but haven't noticed any battery drain issues. I'm also currently running Android 13 Beta on my Pixel 6 Pro which has its own issues with Bluetooth connection but I seemed to have fixed them this morning.

[Clove6060]

@eezeepee @NellyG @mjdmaine 

Well snore report was the first thing I thought of but I’ve run that for a week and loose about 20% over an entire night but I checked it anyway and NOPE.

I thought maybe constant attempt to sync? But still had this thing for a long time and never saw anything like it. I’’ve been watching it and it is now 9:30 a.m. and at 94% so maybe a fluke. We’ll see how she behaves over night tonight 🤨

[DogSpaniel]

Same with me am charging everyday!!!  It still runs out!!  Had to get this as my Ionic was recalled.  Disgraceful customer service.  My band also gives an allergic reaction

[eezeepee · Accepted solution]

@DogSpaniel Welcome to the Fitbit community.

What are your settings? I can get 4 whole days with these settings:

Brightness dim, screen wake motion and button, always-on display off, snore & noise detection off, SpO2 on.

The biggest battery drainers, especially overnight, are the snore & noise detection and SpO2, but more so the snore & noise. With it on, I lose around 20% over 7 hours of sleep. With that option off, I only lose around 6-8% over 7 hours of sleep. I had it on for over a week and I don't snore and noise is minimal so it wasn't worth the drain. If I turned off SpO2 I would definitely get 5-6 days. I keep that on because it's part of the health metrics. 

[Clove6060]

6 Hours later and @ 90%.  So used 4% over 6 hours

during the day. That’s about right. Seems like a fluke.  Big test will be overnight tonight. I’ll check back in tomorrow morning.  Meanwhile I like what eezeepee says. I only use SpO2. Tried the snore and noise detect for a week got tired of charging. I got the baseline which is no snoring and minimal noise, (probably my cat coming in for a purr and knead session😼). 

[Clove6060]

Went to sleep 10:24 pm 86 %

woke up 7:13 a.m. 78%.  ALL GOOD 🙏🏻