A 4,000mAh battery charged in 17 minutes !! whoahh 
100W Super Charge Turbo fast-charging technology
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Itâs going to destroy the batteryâs though. The faster you charge something, the faster the battery deterioratesâŠ
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Note that this was reported earlier from Oppo and the main issue is that theyâre functionally âcheatingâ it
Again the only way you get this is to parallelize the charging. this means splitting the battery into smaller chunks so you can send more voltage in aggregate, since each battery is functionally limited in how much voltage it can take before it functionally explodes
Oppo does this by splitting its battery in 2
Its fairly obvious then that the Xiaomi does this by having its battery split into 4. thus again doubling the amount of parallelization you can charge with
But agian most OEMS are probably not going to want to waste valuable space inside teh phone to split a battery up into 4 pieces (space is wasted via the packing layers and dead space between batteries). This also increases complexity in manufacturing, design (since you need 4 battery terminals) and the logic board support to ensure it can handle all 4 batteries. This will result in an overall increase in costs from parts, needing 4 batteries to manufacture, to design, how to get 4 batteries connected in a small area plus the control circuitry, to manufacturing, how are your female assembly workers going to put together a 4 battery product, to thoroughput, complex manufacturing means less product out or more failure points
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@Satoru, agree with you, they might be using the same method of splitting the battery or who knows, they âinventedâ some thing new 
If they did split, their phone still doesnât look any different than regular android phone from the video. so they compromised some other components to adjust these 4 pieces of batteries.
Fast charging is already in use by many brands including apple & samsung yet no complaints that I hear about the battery. May be this is too early to know if anyâŠ
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Come one, this is scientific fact, not just my opinion or something. If you charge faster, your battery will deteriorate faster.
Samsungâs phones can charge at like 30w (idr exactly). 100w is WAY faster then that, so the effect will be WAY worse.
The speed of charging tends not to degrade the battery faster, it is mostly the heat that may build up from charging that affects battery life. âSlowâ chargers tend to heat up the phone less which in return may result less battery detoritation.
Absolutely right, heat is the main factor as lithium batteries have a defined operating range. The amount of power going into the phone all at once is a bit concerning, hopefully nothing like the note 7 happens again
I have a battery health app on my Note 8 and I noticed since using wireless charging (i use it for almost everything is get the moister detected in the usb-c port) that the battery life health % is dropping way faster than when I was plugging in to charge.
I think 100w turbo charge is crazy and not really needed. I wouldnât double the speed of the Samsung and Apple phones.
Now it comes to the actual product realization part. In a traditional method, any company, before releasing a new product, they are required to do lot of testing, which include but not limited to performance test, HALT testing, reliability test, VA/VR and so on, not just for the sake of regulatory compliance but also to consider their warranty costs which may cause them go bankrupt if they donât do their due diligence. Not to mention losing their market value, goodwill and reputation.
Not to defend any thing here, but Xiaomi is evolving to be a top company, within China and Globally.
But I donât mean to say they fail in their attempt, itâs proven with every big company you name it, Even Boeing failed to test their 737 Maxâs properly.
Hope they know what they are doing.
Note charging rates for batteries now are controlled via the onboard controllers and the OS. Fast charging doesnât really impact the batteryâs longevity
The main reasons the last 20% is throttled is heat management. Not only for the battery to prevent thermal runaway but also the internal components. In todayâs devices the battery takes up 50-70 % of the volume of the device. Since phones are passively cooled you donât really want a giant heat sink in the phone generating more heat that gets harder to dissipate
Note that your device is 2 years old. Battery life cycles are a sideways hockey stick. Theyâre fairly flat up to around 80% then the battery life starts tanking rapidly.
Wireless charging is just an inefficient way of charging a device. The battery doesnât care how it gets energy.
Its true that people who have faster chargers see their phones degrade faster
But thatâs not because their battery is degrading due to the fast charging
Its because people who use fast charging, tend to then, use their phones more because of the ability to fast charge. The fast charging induces users to use their phones mroe, which degrades the battery faster. Without fast charging they would use their phone less, and thus their phones battery degrades slower
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I like this point 
does it apply to all battery types? also that of recent lithium polymers? you know how it is ⊠technologies and materials are constantly evolving âŠ
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