[Update: OxygenOS 12.1 affected too] OnePlus 9, OnePlus 8, Nord & other OxygenOS 11 phones experiencing excessive battery drain

New updates are being added at the bottom of this story…….

Original story (published on January 4, 2022) follows:

OnePlus is one of those companies that started off by making flagship killer devices at affordable prices. Another reason developers and users like OnePlus phones are OxygenOS.

But, like all other skins, OxygenOS has had its fair share of problems. Last year, OnePlus 8 and 8 Pro users reported massive battery drain after updating to OxygenOS 11 based on Android 11.

OxygenOS 11

OnePlus Nord users also jumped in on the bandwagon and reported similar battery drain issues on their devices. The battery drain seems to be affecting OnePlus 7 and 7 Pro users running OxygenOS 10 as well.

While it is normal for a phone to drain battery right after an Android update, many say that the issue persists months after they updated their phones.

It looks like OnePlus never bothered to fix the issue with OnePlus 9/9 Pro, OnePlus 8/8 Pro, and OnePlus Nord users now reporting that their phone barely lasts a day thanks to the constant battery drain.


I have 2%/h battery drain on idle while my brother’s Xiaomi 10T has 0,4-0,3%/h and so does my Samsung Tab S7. I barely get 4,5h SOT… My OnePlus Nord 2 is brand new (bought like 1 month ago) and that’s what accubattery says. Besides, it says 93% health on the battery (considering accubattery only recognises 1 out of the 2 batteries this phone has).Tha main issue is that kind of drain on idle. I don’t use my phone a lot, so losing that much battery when doing nothing is really a problem for me. Hope someone can help. Have a nice afternoon you all.

So I’ve been using my Nord 2 for a few months and I’ve noticed that standby uses an unproportionate amount of battery charge. As an example: Today the battery went down 7% over night with the phone in flight mode, WiFi/NFC/Bluetooth disabled, no ambient display and all apps closed. As a comparison: My 4+ years old previous phone (cheaper than the Nord 2 btw) looses about 3% battery under the same conditions. What’s going on there? My phone is quite new and it should be doing almost nothing in this time, how can it use so much battery?

Some are saying that the Reddit app is causing the battery drain, while others who don’t have Reddit installed say they are affected as well.

It looks like OxygenOS 11 has a wake lock that keeps the phone awake even when the screen is off, but we cannot say anything for certain.

Moreover, since OnePlus is yet to say anything on the matter, it still remains unknown if users are at fault or there is some issue with OxygenOS itself.

Update 1 (July 27)

06:05 pm (IST): Recently, the OnePlus 9 and 9 Pro received the OxygenOS 12.1 C.62 update. Unfortunately the update seems to have brought multiple issues.

According to reports, OnePlus 9 series users are experiencing battery drain, low performance and overheating issues (1, 2, 3, 4, 5, 6). Even the benchmark results are lower than before (1, 2).

Note: We have more such stories in our dedicated OnePlus Section so be sure to follow them as well.

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Anurag Chawake

My fascination with technology and computers goes back to the days of Windows XP. Since then, I have been tinkering with OS, mobile phones, and other things. When I am not working on anything, you will find me enjoying video games on some Discord server.