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.
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.
That’s a narrow point of view. It’s also reducing the ecological impact if a device’s battery isn’t trashed after two years, someone else would likely use it.