Are smartphone batteries ready for the 200W Xiaomi HyperCharge?

Phone charging
(Image credit: Shutterstock / inspire finder)

Xiaomi recently unveiled its Xiaomi HyperCharge, a device that promises pretty incredible charging speeds. Thanks to the 200W charging it uses for wired charging the HyperCharge could – according to Xiaomi – power up a Mi 11 Pro Custom Build with a 4000mAh battery from 0% to 100% in just under eight minutes. 

Though, before we get too excited, some issues have arisen thanks to a Q&A that Xiaomi later posted on Weibo. According to reports from Android Authority, after 800 charging cycles a phone’s battery life would drop to 80% of the original thanks to the HyperCharge. The 4000mAh phone used in the demonstration would have an equivalent size of just 3,200mAh.

Assuming you charge your phone up from empty to full every day, 800 cycles will happen after a little over 2 years. Those are some worrying numbers, especially if you’re someone who upgrades their smartphone less frequently than that, or buys second-hand devices.

Xiaomi has since pointed out that this degradation is within industry limits (with Chinese regulation allowing up to 60% battery life degradation in 400 cycles), though what the damage the HyperCharge could be causing might have some worries.

Is this the future of fast phone charging? We here to explain why charging speeds of 200W can cause so much damage to smartphone batteries and provide some hope for ways these issues could be mitigated. We'll also give you tips on what you can do right now to keep your phone's battery healthy.

Why does fast charging cause issues? 

The reason fast charging can cause problems is because of the design of the lithium-ion batteries that sit inside most smartphones. In short, these batteries work thanks to the movement of lithium ions in a ‘reversible reaction’; when the device charges up a chemical reaction happens and then later the exact reverse reaction occurs when the phone discharges (read: is being used).

However, this process isn’t always 100% perfect, particularly at high temperatures, and unintended reactions that aren’t reversible can occur. Any lithium ions caught up in these reactions are effectively lost, and that’s why your phone’s battery life can start to drop over time.

In extreme cases, where there are very high currents being used, the lithium ions can form lithium metal. If too much of this builds up inside your phone battery it can cause the circuit to short – and in the worst case, the battery can set on fire. 

Thankfully, most modern devices include safety measures to prevent fires from occurring, but these measures don’t do as much to prevent battery degradation caused by similar effects.

But what can be done?

Could these effects be mitigated? 

If phone chargers want to reach 200W speeds or beyond, they'll need to find ways to reduce the effects of battery degradation. While some effects are unavoidable, others could be mitigated.

To account for the excess heat, one solution would be to equip phones (or charging stations) with more sophisticated cooling systems. That way, as the phone heats the cooling kicks in to keep its temperature inside the range the battery is comfortable with.

Another option would be to develop a way to keep devices from charging up to the battery's maximum capacity and stop them from running completely flat. Phone batteries stay healthiest when kept between the 20-80% charge range, and charge the fastest in this range too.

With these in mind, when you're looking to charge up your phone make sure to do so before it's completely out of power, and try not to leave it charging overnight. You'll want to give your smartphone a rest while it recharges too, don't use your phone while it gets its power back as that could cause it to heat up more. You'll want to leave it charging in a well-ventilated place too, and not in direct sunlight or on something hot.

Hopefully, we've given you an idea of why reliable 200W charging may be a little further away. If someone out there does manage to crack 200W charging though, we'll be sure to keep you in the know with all the latest in tech.

Hamish Hector
Senior Staff Writer, News

Hamish is a Senior Staff Writer for TechRadar and you’ll see his name appearing on articles across nearly every topic on the site from smart home deals to speaker reviews to graphics card news and everything in between. He uses his broad range of knowledge to help explain the latest gadgets and if they’re a must-buy or a fad fueled by hype. Though his specialty is writing about everything going on in the world of virtual reality and augmented reality.

Read more
The Redmi Note 14 Pro Plus against a houseplant
Xiaomi tipped to set impressive new phone battery benchmark in 2025 – and I hope Apple and Samsung are taking notes
Razer Hammerhead Pro HyperSpeed earbuds and case on table with pink and plant in background
Feel like the battery on your wireless earbuds degrades faster than other tech? You might not be wrong – scientists have dug into how device design may make the difference
ZMI No.20 (QB826G) 25K 100W power bank
The mighty ZMI No.20 is the power bank I reach for every day, whether at work or on the road
Three-image composite; A Samsung Galaxy S24 Ultra, Snapdragon 8 Elite graphic, and see-through iPhone 16 Pro
AI step aside – 3 ways phone hardware could finally get interesting again in 2025
The Volvo EX30 from the front in a yellow color
Finally! The Volvo EX30 has solved one of my biggest problems with modern cars
BYD Han L
BYD’s latest electric vehicle platform can add 249-miles of range in just five minutes – your move Tesla!
Latest in Xiaomi Phones
Product shots for the Xiaomi Poco X7 Ultra review
I spent a month testing the Xiaomi Poco F7 Ultra, a top-end mid-ranger that masquerades as a flagship
Poco F6 Pro in white from the back showing its Camera array and branding
For a mid-range handset, the Poco F6 Pro is premium in more ways than one, but I found it hard to ignore some of its key pitfalls
Xiaomi 14 Ultra
If this Xiaomi 15 Ultra camera rumor is true, it could rival the Galaxy S25 Ultra
The Redmi Note 14 Pro Plus against a houseplant
Xiaomi tipped to set impressive new phone battery benchmark in 2025 – and I hope Apple and Samsung are taking notes
The Xiaomi Poco X7 Pro on a window sill.
Xiaomi Poco X7 Pro review: one of the best-value cheap phones you can buy right now
Xiaomi Mix Flip review open and closed
Xiaomi Mix Flip review: great to use, hard to find
Latest in News
cheap Nintendo Switch game deals sales
Nintendo didn't anticipate that Mario Kart 8 Deluxe was 'going to be the juggernaut' for the Nintendo Switch when it was ported to the console, according to former employees
Three angles of the Apple MacBook Air 15-inch M4 laptop above a desk
Apple MacBook Air 15-inch (M4) review roundup – should you buy Apple's new lightweight laptop?
Witchbrook
Witchbrook, the life-sim I've been waiting years for, finally has a release window and it's sooner than you think
Amazon Echo Smart Speaker
Amazon is experimenting with renaming Echo speakers to Alexa speakers, and it's about time
Shigeru Miyamoto presents Nintendo Today app
Nintendo Today smartphone app is out now on iOS and Android devices – and here's what it does
iPhone 13 mini
The iPhone mini won't be returning, according to rumors – and you think that's a mistake