New powerbank from Anker stops charging at around 80%

rndmE

Hi folks,

I've got a new powerbank for a week now and it charges my Pixel 7 with GOS only to about 80%.
Sometimes, 75%, sometimes 80%. It begins to charge way slower from around 70%.
If I push the battery status button of the powerbank, it begins to charge again but also extremely slowly and stops after a few minutes and a few % of charge.
I had an old powerbank, also from Anker, before this one and never had any issues with charging straight to 100%.

Other powerbanks or power grid chargers charge the phone to 100% without becoming slower or even stopping.
Other devices are charged to 100% also without any issues.

I'm pretty much stuck in "It can't be the phone" and "It must be the phone" at the same time.
This pretty much sucks but I can't tell Anker that their powerbank if it only struggles with my GOS P7, right?
Sounds to me like some kind of smart charging mechanism in phone or powerbank.
Has anyone of you guys faced a similar problem?
The "Charge to 80%" mechanism in my phone is of course deactivated.

Thanks in advance.

nandohyphen1

rndmE and if you plug the phone into a regular wall charger, it charges? And Limit charging to 80% is turned off? I know you said it stops/ slows at 70-74%, but you may want to just verify that charging limiting isn't turned on if it also does it when charging it from a wall charger.

router99

rndmE isn't the 80% thing a relic of the past?

MetropleX

rndmE have you tried to see what happens with the powerbank attached and your phone off as to what it charges to?

The 80% thing is not a myth or meme lithium based batteries do indeed prefer to be kept and charged between 20% and 80% however there is truth in the position of not wanting to bother as with modern batteries and controllers the battery is likely to outlast the needs and remain in good health regardless. I've never done the 80%, often charge to full and then leave at full plugged in while connected to a hotspot and never have a registered an unhealthy battery in settings nor needed a replacement battery before the device it is in became EOL.

Novalissoide

Which specific Anker model?

rndmE

It is this one:

https://www.anker.com/eu-en/products/a1383?variant=55167850774904

Novalissoide

Very bloated webpage, but is this the one?

https://cdn.shopify.com/s/files/1/0917/4807/3750/files/black-01_6270f712-da62-4e22-9d32-e9f06d455070.jpg?v=1739687716

rndmE

Yes.

Novalissoide

Here's a short manual from their support page. In it, they describe how to toggle trickle charging, for "low power devices" by double clicking the button on the charger. Could it be the case that this specific 'gentle' mode gets enabled?

https://salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000016738/en_US/000016738.pdf

rndmE

Tried this right now, charging stopped at 74%.
Even if I was using the built in cable and not the USB A connection.

Novalissoide

I really can't tell for sure, this is just a guess:
The product page mention by name as compatible, phones from Apple, Samsung, and more.
The charger is both beefy and 'smart', and perhaps it detects the Pixel as less known, therefore it 'errs on the side of caution' and throttles itself, since it lacks a precise pre-installed profile for what the Pixel need to remain healthy. Again, just a spitballed hypothesis.

rndmE

@Novalissoide
Yeah, of course that could be.
I'll contact the support and ask for that.

@nandohyphen1
It does. Every other wall charger or powerbank worked and still works perfectly.
Yes, limited charging is off.

nandohyphen1

rndmE I agree with @Novalissoide . I'd try contacting support and asking them, since it appears that its the powerbank giving issues and not the phone. It could possibly even be just a defective power bank. I'm not sure.

Novalissoide

Good luck, I hope they'll help you.

rndmE

I did a little testing, the charging works like a charm if I don't use the internal cable.
Talked to the support, they'll send me a new device.
Wish me luck.

Novalissoide

rndmE I wish you eternal luck.

Lucario1829

router99 what? the phone enforced 80% thing still exists and i use it as do many others. but obviously its not relevant to this issue

router99

Lucario1829 no, the "it's not good to charge the battery above 80% thing". That's a relic of the past, and charging and battery technology are improved now. It's a meme now.

rndmE

Well... the replacement device behaves exactly like the first one.
The charging stops at 75-80% if I use the built in cable.

I was also able to test the powerbank with the OnePlus (original OS) of a friend, it charges up to 100% without issues even with the built in cable.
As one assumed before: I also think it is some sort of smart charging software intelligence black magic that the powerbank is bringing.

I might be able to test with a Pixel 6a with GOS in the next days.

The initial reason why I opened this thread in the GOS forum was that I was wondering if there are maybe any code adjustments in the charging behaviour between stock OS and GOS.
I can't imagine that this issue occurs with every Pixel phone and this specific powerbank, the manufacturer is too big and Pixel phones are too widely spread for that.

Of course I can live with this but the technic nerd in me wants to know what exactly is going on and of course I'm a little annoyed because the nicely built in cable was a big argument for choosing exactly this powerbank.

I will come back to tell you how the charing of the Pixel 6a will have worked.

Thank you guys a lot for your effort so far!

Grapi

router99

No.