GSMArena.com GSMArena.com

Tip us

1.7m
126k
RSS

EV

Merch

Log in

Login

I forgot my password
Sign up
  • Home
  • News
  • Reviews
  • Videos
  • Featured
  • Phone Finder
  • Deals
  • MerchNew
  • Coverage
  • Contact
ADVERTISEMENTS

Xiaomi explains how it achieved 50 W wireless charging - 4,500 mAh fully charged in 40 minutes

  • Post your comment
  • Comments (29)

Peter 19 August 2020

Xiaomi Android Mobile hardware

The Xiaomi Mi 10 Ultra stunned with its 120 W wired charging support, but the 50 W wireless charging capability surpasses what many phones can do with a cable plugged in. Using Xiaomi’s revamped charging technology, the phone’s 4,500 mAh battery can be filled fully in just 40 minutes.

The company posted a lengthy explanation on just how this technology works. The key was to change the layout of the bits between the coil and the battery – the charge pumps (these are DC-DC converters that are used to increase or decrease voltage).

Xiaomi explains how it achieved 50 W wireless charging - 4,500 mAh fully charged in 40 minutes

Instead of the traditional layout of having two charge pumps in series, Xiaomi put them in parallel. Voltage conversion is not 100% efficient – in fact, common charge pumps have 97% efficiency. And when there’s two of them in series, the inefficiency stacks (97% * 97% = 94%). With parallel pumps, that price is paid only once.

There’s more. Xiaomi used next generation charge pumps with 98.5% efficiency. It may seem like a small difference, but keep in mind that at 50 W even if only 1% turns to heat, it’s still a lot for something as small as a phone to handle.

The pumps are connected to the battery with highly conductive graphene-based material to further minimize losses. The battery itself is split into two cells of 2,250 mAh connected in series.

The coil is pretty advanced too. Multi-strand winding technology was used to tightly weave the wire in 5 layers, a design which helps concentrate the magnetic field and further reduce losses. Also, the phone is in constant communication with the charger, always adjusting its output current for optimal charging.

Xiaomi explains how it achieved 50 W wireless charging - 4,500 mAh fully charged in 40 minutes

You can see the results above – the Mi 10 Ultra battery charges much faster than even the 40 W wireless charging tech used in the Huawei P40 Pro+ (which has a slightly smaller battery to boot).

Source | Via

Related articles
  • Xiaomi Mi 10 Ultra is here: 120W wired charging, best camera setup around Xiaomi Mi 10 Ultra is here: 120W wired charging, best camera setup around
  • Check out the official Xiaomi Mi 10 Ultra teardown video Check out the official Xiaomi Mi 10 Ultra teardown video
  • Xiaomi Mi 10 Ultra tops DxOMark's rankings Xiaomi Mi 10 Ultra tops DxOMark's rankings
  • Xiaomi Mi 10 Ultra and K30 Ultra not coming out of China Xiaomi Mi 10 Ultra and K30 Ultra not coming out of China

Reader comments

M
  • Maz
  • mAx
  • 22 Aug 2020

This is great, and I intend to wait for this to hit Europe instead of getting the Mi 10 Pro. A little question, as I won't be buying multiple 120w chargers. Is there any negatives with the new battery layouts and standard (fast) chargers? ...

  • Reply
T
  • Tom
  • 0wb
  • 22 Aug 2020

Guys, information like that is just like diamond in the feed of thousands and thousands similar phones. And technologies that makes communication devices small and lightweight is something I finally would like to see in the action in the next decade...

  • Reply
?
  • Anonymous
  • m%V
  • 21 Aug 2020

98.5% efficiency, that can't be right for wireless?

  • Reply
  • Read all comments
  • Post your comment
Total reader comments: 29

ADVERTISEMENTS

Phone finder

  • Samsung
  • Apple
  • Huawei
  • Nokia
  • Sony
  • LG
  • HTC
  • Motorola
  • Lenovo
  • Xiaomi
  • Google
  • Honor
  • Oppo
  • Realme
  • OnePlus
  • vivo
  • Meizu
  • BlackBerry
  • Asus
  • Alcatel
  • ZTE
  • Microsoft
  • Vodafone
  • Energizer
  • Cat
  • Sharp
  • Micromax
  • Infinix
  • Ulefone
  • Tecno
  • Doogee
  • Blackview
  • Cubot
  • Itel
  • TCL
  • Panasonic

All brands Rumor mill

ADVERTISEMENTS

Top 10 by daily interest

  Device Daily hits  
1.Apple iPhone 15 Pro Max80,336
2.Xiaomi Redmi Note 13 Pro+71,661
3.Xiaomi Redmi Note 13 Pro55,033
4.Samsung Galaxy S23 Ultra38,174
5.Apple iPhone 15 Pro37,883
6.Xiaomi Redmi Note 1335,930
7.Apple iPhone 1133,929
8.Apple iPhone 1532,611
9.Samsung Galaxy A5432,249
10.Xiaomi Redmi Note 12 Pro27,856

ELECTRIC VEHICLES

BYD celebrates half a million Dolphin EVs made with Commemorative Edition BYD celebrates half a million Dolphin EVs made with Commemorative Edition Jaguar is tapping into Tesla’s Supercharger networkFacelifted Tesla Model 3 Performance to feature new electric motor
ADVERTISEMENTS

Home News Reviews Compare Coverage Glossary FAQ RSS feed Youtube Facebook Twitter Instagram

© 2000-2023 GSMArena.com Mobile version Android app Tools Contact us Merch store Privacy Terms of use Change Ad Consent Do not sell my data