Discussion Google Tensor SoC thread

[ToTTenTranz]

God bless, we need to nuke China just for trying to do """""100W""""" charging inna phone.

They are being charged at 100W.

 

[adroc_thurston]

They are being charged at 100W.

For like 2 minutes.
Either way it nukes battery cycles.

 

[Tup3x]

For like 2 minutes.
Either way it nukes battery cycles.

Yet somehow it has the same 1000 charging cycles before battery hits 80% like competing China phones. While S25 is rated for 2000 cycles while offering comparably pathe... slow charging speeds.

 

[Doug S]

Yet somehow it has the same 1000 charging cycles before battery hits 80% like competing China phones. While S25 is rated for 2000 cycles while offering comparably pathe... slow charging speeds.

Sure maybe it has 1000 charging cycles - if you charge it at reasonable rates. No way it would last a fraction of that many charge cycles if it was being charged at 100W each time.

 

[MarkizSchnitzel]

For like 2 minutes.
Either way it nukes battery cycles.

Lol. Well, good thing then that google with it's slow charging has no such issues

 

[coercitiv]

good thing then that google with it's slow charging has no such issues

I just charge mine every two days in the morning, I have it set for 80% limit but most of the time I don't even hit that.

 

[MarkizSchnitzel]

Nah, I meant how google is now deliberately nuking battery voltage every 200 cycles, and how they had multiple phones now where they like artificially halved battery capacity. For safety they say. Must be using trash cells.

With that battery usage you are barely using the phone, so it should not affect you though.

 

[coercitiv]

Nah, I meant how google is now deliberately nuking battery voltage every 200 cycles, and how they had multiple phones now where they like artificially halved battery capacity. For safety they say. Must be using trash cells.

They screwed up with some of their battery sources and have now implemented safety measures. Apple had similar issues (which even included CPU throttling), Samsung too (they straight up burned). If we judge them by this standard then everyone is using trash cells. Samsung claiming 2000 cycles for their EU stickers is a nice reassurement, but AFAIK those claims do not necessarily represent an actual limit of the cells. Apple is claiming the same 1000 cycles as Google, the same applies for Xiaomi flagships. My guess is they just quote numbers their batteries can pass when used judiciously (with 10W chargers most likely).

 

[MarkizSchnitzel]

I wrote that in the context of negative effect of fast charging.
Allegedly it ruins battery (after an undisclosed time and usage pattern, and disregarding some of the features like 80% and various implementations of "smart" charging, and the fact that you don't HAVE to use fast charging all the time).

But google does not have fast charging yet it artificially does the same thing.

So you end up with presumably similar net result, but you missed out on fast charging.

Not the end of the world, but just dumb.

 

[DZero]

Google is screwing up with the battery and SOC, heck, even Samsung didn't fare so bad in that matter.

 

[coercitiv]

But google does not have fast charging yet it artificially does the same thing.

They do have fast charging though, just not the fastest charging. The Pixel 10, who IIRC is the first to have mandatory battery protection (voltage nuking), charges at 30W.

 

[Tup3x]

Basically probably fine for lighter games but Wuthering Waves didn't run that great. After 10 minutes started to lag pretty badly and it did get pretty hot.

 

[ToTTenTranz]

For like 2 minutes.

For the whole duration needed to charge it towards 100%:

Either way it nukes battery cycles.

Quotation needed.

 

[coercitiv]

For the whole duration needed to charge it towards 100%:

https://www.reddit.com/r/AskEngineers/comments/wvr06p/why_is_phone_charging_time_not_linear

BU-409: Charging Lithium-ion

BU meta description needed...

batteryuniversity.com

Quotation needed.

https://ijaers.com/uploads/issue_files/7IJAERS-0520247-Effectof.pdf

Internal resistance of a battery is affected by the amount of charging current and how many charge cycles are carried out. The value of internal resistance is also related to the State of Health (SoH) of the battery. The smaller value of internal resistance indicates a higher SoH of the battery. This paper presents a comparison of internal resistance due to variation of charging current. The current values are 500 mA, 1000 mA, and 3000 mA. Lithium‑ion 18650 batteries which have capacity 1200 mAh are charged by these current values. Three batteries are used using three scenarios: the 500 mA for scenario 1 using the Liitokala‑Lii500 charger, 1000 mA for scenario 2 using the Liitokala‑Lii500 charger, and the 3000 mA for scenario 3 using the XL4016 constant current (CC) constant voltage (CV) charger. Every battery is charged 20 times. Internal resistance of each battery is measured using a YAOREA YR1030 module during experimental work.

The data experiments indicate that variation of current of 500 mA for scenario 1 increases internal resistance by 1 mΩ; scenario 2, 1000 mA, increases internal resistance by 1.4 mΩ; and scenario 3 which uses 3000 mA gives the highest internal resistance alteration of 2.1 mΩ. It can be concluded that greater values of charging current will affect a higher value of internal resistance.

Playing with battery chemistry, cell count and cooling can help improve charging speed and lower degradation, but the the aspects described above are still fundamentally true for lithium based batteries.

 

[poke01]

The Pixel 10 part is relevant. So MKBHD phone was choppy when the phone was set to max resolution.

Battery life doesn’t seem that good.

 

[ToTTenTranz]

https://www.reddit.com/r/AskEngineers/comments/wvr06p/why_is_phone_charging_time_not_linear

BU-409: Charging Lithium-ion

BU meta description needed...

batteryuniversity.com

https://ijaers.com/uploads/issue_files/7IJAERS-0520247-Effectof.pdf

Playing with battery chemistry, cell count and cooling can help improve charging speed and lower degradation, but the the aspects described above are still fundamentally true for lithium based batteries.

That Reddit post is clearly not from a someone who owns a 100W+ charging phone because it takes 2.5 hours to charge, whereas the model I mentioned does a full charge in 18 minutes.

As for the battery article, yes a hot battery loses cycles. What I asked for was proof that such temperatures are reached in these phones during fast charging.