Very slow charging on P9

Nydalik

Hello everybody,
I experience very slow charging on my P9. After I reboot the phone, charging current drops quickly below 2W (measured with accubattery).
-I didn't change anything on my hardware since yesterday where it worked perfectly
-Bloc charger is an Anker nano, 2 years old, câble is an Anker, very recent. P9 is less than few months
-When the phone is turned off, it charges at normal rate
-I updated to the last GOS version yesterday but I don't think it's related

Usually, I never use my phone during charging. I did use it a little bit, can this make such a difference and have such a huge impact ? Is there any software limitation dropping the charging current when in use ?
Sorry if this seems like basic question, I want to understand. Thanks in advance !

r134a

P9p here noticed similar behavoir with charging at a much slower rate than usual.

There are currently 3 similar reports of people with 9 series pixels 9 and 9 pro (xl) on the chat channel alpha/beta testing.

I myself started noticing 2 days ago on stable, i just this night updated to 2025062000, so i'm assuming it is not related to 2025062000 specifically, but perhaps with an update before that.

beammer335d

P9P xl here, lastest firmware. battery atm is sitting at 36% plugged it in and I see its pulling 33 watts

r134a

beammer335d can u monitor the behavior when the phone is 'in use' aswell?

nopepriverton

Also experiencing this on a P9P XL.
Could it be related to this?
https://support.google.com/pixelphone/answer/15738128?hl=en

This software adjusts the battery’s maximum voltage in stages. It starts at 200 charge cycles and continues gradually until 1000 charge cycles. This helps stabilize battery performance and aging.

As your battery ages, you may notice small decreases in your battery’s runtime. Based on adjusted capacity, Battery health assistance also tunes the phone’s charging speed. You may notice a slight change in battery charging performance.
Clearly there is a big distinction between the feature set of this dubious addition for the 9 series phones and older models

Nydalik

My P9 battery has less than 30 cycles, but maybe it's still related !

Nydalik

When I stop using the phone, 2-3 min after, rapid charge is effective again

Nydalik

Nydalik updated: not everytime*

0289380427

I'm experiencing the same issue over the past few days. My phone always charged fast until a few days ago. I'm using a Pixel 9 Pro Fold, with the latest Stable channel update. My battery is at 300 charge cycles. I have a high-quality brand charger and my phone is charging really slowly over the past few days, I used a dongle to check how many watts it was pulling, it shows 2-4watts when in use. Restarting the phone fixes the issue, it jumps straight to 10-15 watts, but as soon as i start using the phone it quickly falls down to 2-4watts. I have a strong feeling it's related to the high temperatures, in the past few days my zone is experiencing 40°C. I will do more tests and report back later.

de0u

0289380427 I have a strong feeling it's related to the high temperatures, in the past few days my zone is experiencing 40°C.

That's pretty hot.

Does the charge rate change if you place the phone on something cool such as a freezer cold pack?

0289380427

GOS devs should take a look at this.

1) P9PF is charging at 1-2 watts.
2) I turn off/restart the phone.
3) It insta jumps to 12-14 watts.
4) I let it sit for a few minutes just to see if it stays there.
5) It's still at 12-14~ watts.
6) I turn on the phone.
7) Starts dropping watts.
8) After 2 minutes, it's already back at 3-4 watts.

The phone is NOT warm. My room is not that hot. No app is opened besides VPN running in the background (like i've always used).

I've tested this 3 times, always same result, as soon as i turn off or restart, the charging watts jump to 14 watts, then once i turn it on it starts dropping quickly. Seems to be software related.

0289380427

de0u

No. I tested for 10 minutes with ice.

de0u

0289380427 No. I tested for 10 minutes with ice.

Thanks for the report!