You're becoming more of a truth seeker and journalist than before, you're adding a lot of value as you evolve beyond just reviewing tech to actually help us understand how it works. Thank you Marques.

As a retired engineer who specialized in battery technology, I'm here to say you've done a perfect job explaining battery charging.

Many years ago I was a programmer writing software for a battery development lab. One of the biggest things that we were working on was the most effective way to charge particular types of batteries. We had engineers, chemists, physicists, and, of course, programmers involved. An astounding amount of science for a simple process.

Sometimes I think we as consumers have become desensitized to how amazing our technology is. I like this type of content

I just want removable batteries to make its comeback.

Ok, fast charging allow you to charge FAST between 20% to 80% (in 10 minutes with a 120W fast charger). This interval is perfect to preserve battery life and doesn't create much heat. I have a 120W fast charging phone and after one and a half year, I lost ~4% of battery capacity (I use Accubattery to estimate the battery degradation). Basically my battery life hasn't really decreased and I don't have to wait for an hour to use my phone again.

I love that your videos dont have background music ... & you speak to the audience at a natural pace. Also appreciate your effort to learn the stuff before conveying it to us, thanks bro! :D P.S. Love the humility in your speech, never change!

don't activate french audio on this video, it's a nightmare ...

Man I miss the days of user swappable batteries. You never had to worry about running out of juice. You just carried extra batteries with you and in just a few seconds you were back to 100%.

This has got to be my all time favorite MKBHD video! It's literally everything you need to know about your phone battery.

Love your videos, keep up the good work. I know it's a lot of hard work getting out good quality videos 👍

MAD RESPECT!!! This guy had a really good question, then did the research behind the answer. True hero!

It's mostly all about heat. If less heat is produced and more the heat is spread out, the battery doesn't suffer as much from charging and doesn't wear as much. I don't know what is the exact sweet temperature to achieve 80+ watt charging at, with the least possible wear, but it is hard to maintain as the battery wants to warm up as it charges. Good to also mention that the battery degradation isn't linear to the charge cycles, but it starts off with a large wear amount per charge when it's new, heading to a more mild wear amount. For example, the first 150 charge cycles (lets say degradation from 100% to 97%) could degrade your battery as much as the next 300 cycles would (from 97% degradation to only 94%, instead of 91%).

Linus did some experimenting on this a while back, IIRC he found that it's less about how fast the battery is charged, and more about the range. Fully charging and discharging battery puts a lot of stress on it. Doing so repeatedly degrades the battery. Doing so repeatedly while also at high temperature, _really_ degrades the battery.

Marques, i am an old guy and you are absolutely the ONLY tech guy i trust and follow. I base all of my tech choices on your research and opinions. AND you have a magic personality. All the best to you young man. JT from downunder.

A year later and people like me still search for this exact video. Thanks again Marques

Hey Marques! I worked in the battery industry for 7 1/2 years. I can tell you that if you are very worried about battery health, long term, use the slowest charger you can and don’t use your phone while charging. Charging solutions are improving but lithium batteries have not changed much. I use the 5 watt charger still on a timed plug overnight. My iPhone 13 Pro’s battery health is at 99% still, I have had it since launch. I actually tested this theory with my iPhone 12, I used the 20 watt charger instead and sometimes wireless charging, both of which cause more heat. I saw much more battery degradation in the same time period. I am super interested in what some of these companies have done the last several years and ultimately I think some developing technologies that are on the horizon will solve this issue entirely. Update: I think a lot of you missed that I prefaced my comment with “if you are very worried about battery health”. One more tip, if you have a device you plan on keeping for years and don’t always need the full battery life then you don’t need to charge it to 100%. For example, I have an iPad I use mostly at home. I will often charge it to 70% or 80% then stop. I usually only charge it 100% when I am taking it on the road with me. Follow these steps and you can expect your device to have 95-100% battery health for a much longer time since much of heat and battery degradation occurs at the end of the charge in that 90-100% range.

An actual test of this would be fun. Charge a few different phones at different wattages over 100 cycles, measure heat during charge, and measure capacity at the end.

Wow, this was actually a really good video. Recently purchased a S23+ and a 45W charger but I saw in another video that it makes almost no difference from a 25W charger. Maybe like 10 minutes in charging time. I went with the S23+ for a bigger battery and faster charging speed. So far I am unable to drain the battery, it's very energy efficient. Thank you for this video.

Thanks for the clear explanation man! This was exactly what I was lookin for

I'd certainly take a thicker phone if it meant improved durability, sd card slot, and room for a larger, and/or user swapable battery.

0:55 love that elden ring sound

This is the best video that did not knew i needed to understand chargers and all that stuff

This is something I always wondered about, thanks for a very informative video

The battery health on my 30-month old iPhone 11 Pro is still at 100%. I can’t explain it, but I’ll certainly take it.

Would have been nice to mention that even before fast charging, expected battery life was kind of about the same: after around 2 years, it was normal to lose 20% of your battery capacity

Very well documented, the depth of knowledge in 12mins. Hats off

Awesome video. I appreciate the research you did for this. Thanks ! 👍

"I'll link one of them below the like button." 3:13 THAT WAS SO SMOOTH

It would be interesting to make wireless charging more effective by have a charging pad that measures the temp of your phone and can cool both itself and the phone to reduce the heat created by the coils

Awesome video bro. Brilliantly researched and presented. I work with all different types of batteries for work and I agree with everything you said. 👍🏼

u have no idea how much we trust you and how much those videos help us , thank you

Super informative, would love more videos like this! Longevity and reliability of tech is honestly really overlooked in most tech reviews, so I’m glad to see more stuff like this!

You know, you have played too much Elden Ring when you recognize this sound 0:54 on a tech related channel!!

I only buy things tech if this guy does a good review. Only KZfaqr I trust when it comes to honest review for anything tech. Got to the point if I don’t see him doing the review I don’t watch it. Keep up the good work and may God continue bless you and your team!

Very competent research, well delivered and very interesting. I'm feeling more appreciation for phones now than 15 minutes ago.

Remember 6 or 7 years ago when this didn't really matter on anything except an iphone? Down to 60% capacity after a year and you can't afford to replace the entire phone yet? Just buy a new battery for $20-30, and no proprietary tiny screws to remove, adhesive to melt, screens to pry off with suction cups while trying not to break anything, security chips to reprogram...

I research batteries for a living and This is something I always thought of when I see companies advertise fast charging. It was interesting to see you cover this in detail and actually explain the science!

From a chemistry PhD student point of view, your explanation of the battle of batteries was exceptional! You explained all the essential info without getting to technical. Congrats

I really like the way you present your topic. Thank you.

I love how Marques Explains Things, It’s easy to follow, packed full of information at the same time, while not being condescending at all.

Something to consider on the battery health, as you lose charge, you'll need to charge your phone more often with the loss of capacity. So saying you're "on track" to have 85 percent is not taking into account that you'll charge more as you use them.

Your reviews are spectacular. Thank you.

Great video! If my phone starts getting hot I hold it over air conditioning to get it back cool again to save the health of the battery. Really interesting to hear the info!

I can’t even begin to tell you how much I appreciate everything you bring to the table, Marques. I’ve been a subscriber and follower since your early college days and you really are one of the true greats in the space. Theres no doubt about it. Thank you for these wonderfully made, informational videos. Never a disappointment.

I feel like the benefit you get from fast charging helps to retain the battery life. If my phone took 2-3 hours to fully charge, I'd often leave it over night to charge, but with fast charging I usually just plug it in here and there for a few minutes and I have an app that alarms me when the battery is at 80 % so I unplug it. That way I extremely rarely charge it to full and pretty much never let it go below 20 % saving quite a bit of battery life. I have a OnePlus 6T that I bought when it launched, so about 3,5 years ago and my battery health is still at 87 % always charging it with the 30 W fast charging.

Very solid jnfo and exactly what I was looking for. Your style of presentation is easy to listen to. Thank you.

Great video Marques. Thank you. The best analogy for battery charging that I have seen is that of a huge parking. Imagine a huge, empty parking lot. When a car enters the parking lot, it can speed to any space in the lot. But, as the lot fills with cars, subsequent cars have to slow down to avoid collisions and damaging other cars attempting to park or already parked in the lot. The more full the lot becomes, the fewer spaces remain, and the slower cars must travel to avoid collisions. Your battery is the parking lot. Your charger sends electrons "cars" into the battery "parking lot". When your battery is empty, the electrons can fly to the cells in the battery. As your battery fills, the charger must send fewer electrons so as not to damage the battery cells.

I work with li-ion cells and have found out that slower charging rates tend to give longer battery life - primarily because of the heating of the cell(s) becoming lower.

Thanks Bhai Takimg UP The Confusion Topic ❤

Keeping up the great job of keeping us informained! 😉 TNX MKBHD

i always feel like am watching a high production movie at 4k everytime marques uploads. The spatial sounds, detail to color scheme just amazing! And yes i don't think there's another youtube channel that feels this way. No idea what you do behind the scenes but keep it up!

Its amazing how you are able to come up with good content every week.

You can also just use a lower wattage charger if you're worried about fast charging... I charge my xperia 5 iii with a 5 watt charger, and have it set to only ever charge to 80%. that 80% still gets me through a full day of heavy use a year later.

Amazingly detailed video. Absolutely love it.

What a fantastic presentation of electron flow, battery composition, and charging tech. Bravo Sir

Phones are so advanced now, between the power management system and the machine learning in the software, I just plug it in or out whenever I need to, and keep it from getting hot, and it works great. I still avoid inductive charging but I'm probably a relic...

Very informative! Thank You!

Marques this was a very well prepared video, good research and an over the top vocabulary. Keep up the good work.

Nice breakdown of what I understood intuitively. I never thought fast charging is a problem because indeed it's always only the first minutes when it's real fast and it doesn't do that long enough to heat up much

Much respect - you helped and I am sure others get a more realistic perspective on how this all works. Your knowledge and communication game is so next level. It is obvious you are a man and a company who cares about others. Keep up the good work. :)

The french version of the voice is actually eating his microphone like it was the last thing on Earth...

This was awesome. Very well explained! Some friends were saying I was still using the "oldschool" method of preserving battery by letting it get to

Very nice presentation on this subject! You can take what you’ve learned to related uses in general: - some of my bigger battery power banks actually charge faster if I unplug them to let them cool off after a certain percentage to plug them in later on. - don’t put your phone on your car’s dashboard in direct sunlight when navigating. Use one of those air roster phone holders so your phone gets cooled by the car’s AC/ventilation while driving.

Nice, been wondering about this for a while. I assumed phone companies wanted fast charging regardless of phone longevity so they can sell more replacement batteries and phones. Maybe we are moving in the right direction in terms of tech longevity.

Thanks for the excellent video. I really enjoyed watching it. I am a Linux developer that switched from Samsung to iPhone last December. I have only been slow (low power) charging my iPhone during the night and yes I have noticed the smart software making sure the phone is only fully charged when I wake up at 6 AM. After 6 months my iPhone battery is still at 100% Maximum capacity! As a physicist (by training), assuming that the whole system follows Ohm's law (yes that a bold assumption), the amount of Amps is what determines the heat production (P=VI, V=IR => P=I^2R). That's why modern electric cars use high voltage DC chargers. At any rate, I am very satisfied with my iPhone, even when it is an older model. I will never switch back to Samsung. Samsung refused to allow me to remove M$ OneDrive from my new phone. The help desk of Samsung was actually rather rude. So I returned the phone as I do not want software from M$ on my phone. I will never buy Samsung again, no matter what.

Your in-depth analyses are amazing! Thank you for all that you do to keep we techies informed.

You're legit about to make a whole documentary on tech one of these days and I'd sit and watch the whole thing! lol Keep evolving MKBHD! Much love brother!

I love when you scientifically explain things, makes you stand out as a tech KZfaqr! It would be incredible to see a series of videos like Veritesium but based on tech coming from you.

thank you for really great video, this made me understand a bit better how it works.

I have a Redmagic 7 Pro which uses with a 60W GaN charger. With one of those W measuring cables I noticed it charges about 56W then slowly rise to 60 when around 65% (doesn't go to max charge as soon as I expected). If heats up too much during charging it drops to 30W until cool enough (but only if you're using it a lot since it has a cooling fan which automatically starts when plugged in). On the other hand, charge separation (how RM calls the pass through charging) barely supplies 2-3W so it's really helpful for heat management and to avoid charge cycles.

Very informative video, I learned somthing new today. Thanks MKBHD

I really just want a smart phone with a replaceable battery. Like a panel on the back I can pop off and pull the batter out rather than having to fully disassemble the phone.

Great video explaining this man. Thank you.

Thanks for finding some very useful information for us!!!

Your videos have reached a production level they no longer feel like youtuber videos but like there is a real production team behind it. The end result is .. solid. Kudos to you.

Love watching your videos man. You do a really professional job explaining things.

That was an incredibly informative video. Thanks :)

This is one of those topics that you can find armchair tech experts fighting over on every corner of the internet. So refreshing to find such a concise and well researched video on a convoluted topic.

As an engineer I appreciate the way you ar presenting technical terms and the research behind your explanations. Great video!

Fantastic video, I used to obsess about keeping my phone between 80% and 20% - it's crazy how the landscape has changed and how fast we're able to charge these things.

love my power delivery display cable REALLY useful with a solar panel and battery bank, to get a quick optimal angle check

Hi firstly great video and very well explained.I have been using an Oppo Reno 4g pro for two years and it has 65w charging. I charged from around 30% to 100 every other day and the battery health is still around 89% so fast charging, from Oppo at least, does appear to work. Also I never noticed the phone heating up much during charging either, In fact I noticed far less heat compared to my wireless charger on my old phone. Charging from 0-100 in around 40mins is a huge benefit to me too. I now have a Oppo find x5 pro with a 5000mah and an 80w charger but despite the increase in watts it's slightly slower to charge than the Reno and the phone is almost cold at 100% so it seems the charge management seems to be improving too.

The research that you dug in is just impressive. I feel like this content length isn't lengthy but feels like just 3mins of content. I really enjoyed and learnt a lot from this content.✊

I love how you detailed everything. explaining how it works, the advantages and disadvantages.

I learned something new today...good informative video

this was actually very informative! thanks

Mil gracias Marques. Esta informacion me ayudo mucho porque no tenia la menor idea como trabajan las baterias y porque siguen cambiando la technologia. Saludos!

I used to work for one of the companies mentioned in this review as a part of their product team and “charging speed” and “battery life” are the only two things the team focuses on, not “battery longevity”. This is because in the market studies we used to do, no customer would ever say that battery longevity is important for them, and that’s because most people are not aware that batteries degrade over time and that there is an inverse relationship between charging speed and battery health. Even other product managers are unaware of this problem. They keep switching phones every 3 months or every year and never get to feel any degradation in battery health. Samsung has an option to disable fast charging on its phones and I feel that’s a must-have option on all phones. Other companies feel that if they give the option to disable fast charging, then it would show their fast charging technology in a bad light, hence people won’t buy the phone.

Man, this video is great, liked and subsribed. Keep going!

Good informations, keep it going, appreciated.

Nice break downs. You explain tech quite well. Glad I found your channel.

Organised, educative, informative and utterly paramount in general, this video not only captures attention in the beginning bt constantly engages emotions throughout. An epitome of a great video. Kudos

Thank you for your findings!

That was quite great explanation! Thanks for the video!

Love my Oneplus 9 with 65W Warp charging. I now charge in the morning while eating breakfast before work. Typically plug it in at like 20-30% and charge to 90-95% in maybe 15 minutes. It's honestly a game changer for me coming from a slower charging phone because I can juice up so quickly as needed

Your channel is quickly becoming one of my most trusted and on-point resources. Masterclass in presentation too.

Love the video, very detailed ❤ now i understand 😊 thank you!🎉

Nice informative video keep coming up with more stuff

Just want to say - great video! The information is so helpful as I'm looking for a faster charger (my Samsung Galaxy S21 Ultra didn't come with a charger, which seems to be happening more often here). I'm probably not going to go mad with wattage but I want a lot more than what I have now with this old charger.