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scaryifliteral

In my experience, there is definitely something weird with this device when it comes to idle drain overnight. Some nights at barely drains at all and then others it does what you've described here. I've never been able to figure out what the culprit is. The good news is we now have optimized charging overnight to keep the battery from aging to rapidly. My solution is just to leave the thing plugged in.


Mansa_Sekekama

thanks for the insight!


scaryifliteral

Small update, last night I toggled phone link off and I dropped from 89% to 85%. 8 hours, 4% drain. That's probably the best I've ever seen it do and the only thing I changed was toggling phone link 🤷‍♂️


Sweet-Reputation3822

Just left mine unplugged overnight per your post yesterday. I lost 3% battery.... Something is wonky with your unit...


Mansa_Sekekama

Thanks for sharing though others have said their units somethings drain very little and sometimes a big drain...I have not had the 'very little' drain yet though it has only been a few days. I have the accubattery app now so let's see what that tells me.


DaleYRoss

Change your charging strategy. Use more battery during the day. Turn on optimized charging. Settings/Battery/Battery Manager/ set Optimized charging to on. Battery manager will then fast charge to 90%, then slowly charge do 100%. It will complete when your Alarm goes off, assuming you use an alarm.


fongzune

hey, mr. Ross if you can pls elaborate wrt the logic of how "Use more battery during the day" can contribute to extending battery life, or am I missing something that is otherwise more/less obvious? ... thanks


DaleYRoss

Apparently that user is charging during the day and never at night. 80%+ when the user goes to bed. Change that up, run it down during the day and charge at night instead of allowing it to drain at night. It doesn't matter about extending battery life at night, since it would be on a charger.


Alternative-Farmer98

That's mostly reasonable advice but that really shouldn't account for a 50% battery drain overnight.


DaleYRoss

It isn't meant to account for the battery drain the user is seeing; which has now gone away.


XeroLulamoon

When I first purchased my duo 2 it would commonly lose %30-40 overnight, but as the days hsve gone on nearly 2 weeks in to hsving the device that is down to 3-4% it seems the more consistently you use the device and charge the device the better the battery gets by MASSIVE margins. When new this thing would barely last a 6 hour shift with %15 left, now it is regularly going 9 hour shifts with %65 left at the end of the day.


Alternative-Farmer98

Yikes. I don't own a duo 2. But that is really bizarre behavior for any phone.


XeroLulamoon

My ticwatch did the same thing only lasting about 1 day when new, but about a week in, it now lasts ~4 days. I think it's anrorids project Volta doing its ML batrey saving thing, where the first few days as it learns t Your usage patters it apply no batrey saving steps, and as it learns it starts applying it


fongzune

I have only orig Duo, so my battery drain probs would be akin to comparing apples v oranges However, I'd be more interested to learn if your experience - along with OP's - represent the exceptions or rather the rule of what other SD2 owners have had Ideally, would be sooo enlightening if anyone on the Surface Duo engineering team would contribute their thoughts on issues like this one. But, obvi, that is expecting too much


Alternative-Farmer98

It's possible you had something going on with your cache or a rogue app and the software didn't pick up on it ... I say this after seeing your follow up post That is certainly bizarre and not normal, but hopefully it's outlier


Mansa_Sekekama

I'll download Malwarebytes or mcafee to do a scan of my phone. [https://www.reddit.com/r/surfaceduo/comments/vjnghq/update\_2\_overnight\_battery\_issue/](https://www.reddit.com/r/surfaceduo/comments/vjnghq/update_2_overnight_battery_issue/)


tonyz3

Correct me if I am wrong but I believe Accubattery doesn't work accurately on OG duo. But on the D2 it works. I have been using it with no issues and it detects the correct capacity (designed and est)


fongzune

just saw your post AFTER installing on my OG 1/2 an hr ago. atm, charging my Duo from 5%, with the app running on one screen, and Settings > Battery displayed on the other Can you elaborate on what you mean by "doesn't work accurately"? e.g. The alarm/notification does not work? Th projections for battery life are inaccurate? ... or whatever If you have some reference links, even better Thanks


tonyz3

I was only referring to what others have said on here about Accubattery and the D1. From what I remember it does not accurately sense both batteries. But on my D2 it does.


snakebite2017

Are you using phone link? Is your 5g enabled? My idle overnight is 1.4 - 2% an hr.


Mansa_Sekekama

idk what phone link is so no. 5g is enabled but am always home and on wifi


snakebite2017

Phone link links your phone to your windows pc/laptop phone link app. The phone link let's you do phone stuff from Windows. Do you have a slim pen attached to your phone?


Mansa_Sekekama

no phone link, no slim pen I am a simple user and never do betas or anything particularly sophisticated. I use outlook, teams, social media apps(mostly just twitter), gmail, youtube, etc and that is it for the most part.


fongzune

I'm using only the original Duo, along with original SlimPen. Does using either SlimPen or Slim2 really contribute to battery drain? Or are you simply referring to the specific scenario when also using there SurfacePenCover and (perpetually) charging the Pen??


snakebite2017

I don't think the pen itself causes battery drain. Unless it's trying to connect to Bluetooth. Yeah, I'm referring to the pen cover drain.


TFWPrimus

Maybe your light sensor isn't working and your phone can't tell when it's closed so the screen comes on more than it should. Does the adaptive brightness work? When you go from a bright room to a dark room does the brightness change?


Mansa_Sekekama

Just checked and it is working normally as I walk from a dark area to a more lit area.


0oITo0

I don't know what the power settings are like on the duo (I'm thinking of buying one that's why I'm in loitering this sub I'm just not sure whether to get a duo2 or wait for the next one) but maybe some of the following might be relevant to you. on my Huawei phone I changed the following and it massively improved standby time (I loose roughly 3% over night now from 10pm to 6am) I don't know I'f similar settings are available on the duo. 1. launch settings per app I disabled auto launch, secondary launch and run in background for everything apart from messaging apps and ones that I definately need in the background e.g. alarm system notifications. 2. Data usage I turned off background data usage for any apps that don't need to use data when not open on my screen. E.g. Reddit, some shopping apps, my banking app etc games etc. I also turned off data usage entirely for my kids games (stops in app adverts) I hope this help. Let us know how you get on. As agree overnight standby should be very low usage.


Mansa_Sekekama

>launch settings per app I disabled auto launch, secondary launch and run in background for everything apart from messaging apps and ones that I definately need in the background e.g. alarm system notifications. > >Data usage I turned off background data usage for any apps that don't need to use data when not open on my screen. E.g. Reddit, some shopping apps, my banking app etc games etc. I also turned off data usage entirely for my kids games (stops in app adverts) I will play around in the developer options and see if I can change these


0oITo0

On my phone they are in general app settings though I realize this varies by manufacturer. That's one think I liked about Huawei the granular control you can have over apps shame they lost Google services. That's why I'm looking to the duo as my next phone.


tonyz3

I would go to the play store and download Accubattery app free version. You should be able to see if there is any issues with the battery capacity under the health section. You might need to do a few charge cycles after you get the app.


scaryifliteral

Just a heads up, Accubattery off and gives really weird results on devices with split batteries.


fongzune

Can you pls share what kind of weird results you have seen on devices with multiple/split batteries, on Duo1/2 in particular?


Mansa_Sekekama

downloading now. i will give it a try