TLDW; No
Basically the video is testing phones with varying charging speeds and how much battery degrades after 500 charging cycles. Also, the affects on performance after battery degradation at 5:37
Timestamps of some tests:
- Test results for different charging speeds at 3:06
- Storing batteries at 1%, 50%, 100% at 3:43
- Battery performance at 4:42
After 6 mins he talks about why the tests took 2yrs and how they did it 3 times.
What do people think of the chargie ?
The elephant in the room here is charging a battery when it is hot kills it fast. I live in a hot country and my (GrapheneOS) Pixel7 was spicy pillow in 18 months, happily charging away at 50+C at times (I leave it in a wireless charging stand 90+% of the time). Replaced the battery with a iFixit kit and got a chargie, which lets you set a cutoff charge temperature which I set to 33C (and 80% charge). Often in summer it charges only at night. Another year odd later gOS reports 100% health FWIW. Any phones out there that allow limiting charge by temperature natively? These devices all get developed in cool climates and aircon it seems…
Summary:
-
When your phone’s battery health drops to about 85%, battery life shortens noticeably.
-
When your phone’s battery health falls to around 80%, a battery replacement is recommended.
-
When your phone’s battery health is above 80%, performance is basically unaffected.
Not related to the video. But, this guy only has 37 videos yet somehow has 1.5Million subscribers. He also knows geekerwan. Wonder if there’s anything sus…
Apparently this is a well-established channel in China, and they’ve just recently started translating their backlog of videos to English for YouTube.
If you hit it right with shorts that’s not that weird, shorts are huge for driving up subscriber numbers.
Considering the views of some of that channels shorts, it’s probably it.
Was there nothing about how fast charging impacted how quickly it reached 80% SoH?
He only checked battery health loss. Not the speed of capacity loss until 80%.
The end result, it does not matter. Use and charge your phone how you would like to. A few percentage for keeping the battery at 20-80% only to have a reduced capacity from the very start does not make sense.
Well. I mean that’s like THE most important thing. Charging at a higher C rate is going to cause increased wear on the battery and less life. That’s why most phones are limited in that way.
He did test Iqoo phones charging at 120W. And the wear was less than slow charging. So, that should answer your question. But, he did ask to comment any other tests people wanted.
You can drop one on this video if you want to.
I don’t have a Google account, sorry
It makes sense to me IF it actually works.
Having extra capacity when a device is brand-new isn’t a huge boon, but having stable capacity over the long term would be. At least for me.
Of course this will depend on your habits. If you replace your phone every year, then it doesn’t matter. If you’re a light user and only go through a couple charge cycles per week, it’ll matter less than if you go through 1-2 cycles per day.
Personally I’m at around 1 cycle per day on my current phone, and after nearly 3 years (over 1000 charge cycles now) the battery life is shit — much worse than just 80% of its original battery life. Performance also suffers. With my last phone, I replaced the battery after 3 years and I was amazed at how much faster it was. I didn’t realize throttling was such a big problem.
I might replace my current battery, but it’s such a pain, and it costs more than my phone is realistically worth.
SoH?
State of Health?
Yes, it’s a key metric for BMS.
Bowel movements?
State of Health for Battery Management Systems
Thank you for the summary!
-
The amount of time the battery spends at higher voltage definitely affects its capacity over time. There’s plenty of research on Li-ion battery service life characteristics done with greater scientific rigor than is possible with batteries installed in phones.
It can take longer than the few months these tests required to see the effect. A phone that’s usually stored at 60% will eventually show a big capacity advantage over one that’s stored at 100%. That’s probably mostly true at 80% as well.
For some anecdata, my Pixel 4a has spent most of the past five years limited to 60%. It reports 1152 cycles and 91% capacity.
But is there an advantage on artificially limiting your battery to 60% rather than charging to 100% and having 40% degradation at the end of the lifetime? In the second scenario I start at 100% capacity that slowly gets lower and lower whereas in the first scenario I have only 60% from the start and still some (although much less) degradation.
Yes, but given how the battery charge controllers already manage it, I don’t think you’ll see a meaningful difference. You’ll probably replace it for other reasons before then.
The advantage is that I can occasionally charge it to 80% or 100% if the situation demands it.
Charging the battery kills the battery yes
Not that its a bad study or anything, but where are the data points? Did they happen to publish their numbers somewhere?
Quite a few components have extensive detail on their specs. IC chips/resisters/etc…etc…
Also android artificially reduces capacity as it gets older. Most of the pixel phones for example will use number of cycles + time to determine the “max” capacity. So it can be artificially worse depending on the model. No idea what iphone does.
Its not the best test imo. He only did 500 charge cycles which is more like 1.5 years worth of charge cycles. But even having data for 2 years isnt very useful. If you replace your phone after 2 years then there is no need to care about battery life at all. This whole thing of preserving battery life is something for people that want to use a phone for 5+ years without needing a new battery.
In the first place, people have already done professional studies to analyze all kinds of lithium battery capacity degradation over many cycles and thats where the 30-80% number comes from. The whole introduction to his video is “there is a saying”, so all he had to do was actually look at the research where that “saying” came from. Then he could have still run his little experiment in an attempt to replicate parts of the study. Instead he basically told the viewers “if you throw away your phone after 2 years, then you dont need to care about charging limits” which is very useless information.
After 1500 cycles the difference between the 5-100% and 30-80% system would be so drastic that you wouldnt be able to really use the first one, while the other one would still work decently well.
Not that its a bad study or anything, but where are the data points? Did they happen to publish their numbers somewhere?
Atleast cannot see anything in this video. Maybe, on weibo?
Also android artificially reduces capacity as it gets older. Most of the pixel phones for example will use number of cycles + time to determine the “max” capacity.
About android. Is there any report about android in general or just pixel?
Also, Good point about pixel. The forced capacity reduction cannot be stopped by the user.
Iphones reduced Soc performance in the past. Now, they do when detecting low voltage on your ageing battery and provide a bypass.
About android. Is there any report about android in general or just pixel?
Im only aware of pixel ATM. Thats a good point. Im not sure if google only made this change on pixel or with other phones somewhere in the blobs they distribute. According to the video above, it sure seemed like it as not reducing capacity if the reading was correct.
Not familiar with weibo. Ill take a look, thanks.
The message is correct as modern phones are able to take care of their batteries.
The experiments themselves were very flawed.
I want someone to make a slow charger with PPS to compare them. My phone on a “slow charger” gets about as hot as when I use a fast charger with PPS. But a fast charger without PPS and it gets extremely hot and slows down charging a lot. Especially when I leave it on my bed. That definitely is not good for it’s health. They charged their phones in little stands which gets them plenty of airflow to keep them cool.
It looks like the iPhone 12 doesn’t support PPS. Fast charging could be even better if they used a device that supports it.
The charging tech does make a difference on charge speeds and heat. But, PPS should not make much of a difference. especially against advanced chinese charging tech solutions.
My phone gets hot when I use a slow charging. But, Phones using SuperVooc charging tech do not have heating issues when charged with them. Because they have most of the charging logic in the charger and not the phone.
So, your phone can be pumped with 60-120w and you won’t notice much heat at all.
The 120w xiaomi 13 charging is insane, so I usually “only” uses the 67watt except for “emergency charging”, because it heats a little.
