Explained: What is fast charging and how does it work without blowing up your phone – Firstpost

OnePlus Nord 2 review
Return of the flagship-killer
September sky events
Meteor showers, a comet, asteroids and more
FP Explainers
Just a couple of years ago, your average smartphone would typically come with a 5W charging brick and would usually charge your phone from zero per cent battery all the way to 100 per cent in about two or two and a half hours. Fast forward to today, 40-65W fast charging is a very common feature in most phones, and some even go up to 80.
What is fast charging and how does it work
OnePlus 10R & the Realme GT Neo 3 150W edition, support 150W charging, which can completely charge a 5000-ish mAh battery in almost 17 minutes. Now that’s impressive. So how does fast charging work exactly?
Not all phones are created equal
Now, different manufacturers use different fast-charging protocols. iPhones & Pixel phones use USB-PD, whereas most Android phones either use the latest standard from Qualcomm or, as in the case with Realme & OnePlus, use their own proprietary charging protocols. With that being said, most of these protocols function in a similar manner. The difference arises in terms of wattage allowed to pass between the charging brick and the device itself. This is done by using a specific grade of equipment, called controller chips and, by calibrating the charging ports on the device to work at its maximum capacity, only with a selected type of charger. This is also the reason, why a certain fast charger, from let’s say OnePlus, might not work on a phone from some other manufacturer, like Samsung.
A little chemistry
In any given battery, there is a positive terminal and a negative terminal. Most phones use a lithium-ion or a lithium polymer battery. When a battery is powering a device, the lithium ions flow from the negative side to the positive side, through a liquid electrolyte solution. This flow is what powers the device. When there are insufficient lithium ions on the negative side, i.e. the flow becomes weak or stops altogether, the battery runs out of charge.
Charging the battery again makes the ions flow from the positive side, back to the negative side, again, through the liquid electrolyte solution. The wattage of the charger, and the charging protocols, determine the speed with which this flow takes place. The higher the wattage, the faster the flow of the ions at the peak.
Dealing with heat
During the charging process, it is this electrolyte solution that heats up. Sometimes, this heating up of the solution may even cause the battery to explode, especially if it isn’t managed properly. That is why you will see, that as a battery starts reaching its maximum storage while charging, say, 75 per cent or so, the charging speed slows down this is done to reduce the heat output, and extend the battery’s life. Another thing that causes the battery to heat up, is that after a certain number of charging cycles, these ions lose their capacity to hold a positive charge. This means they cannot flow through the solution. This is why, after a few months or years of usage, the capacity of the battery also dips. The more “dead” ions in a battery, the quicker it heats up. This also leads to batteries expanding. Basically, with fast charging, the wear and tear on a device’s battery is also higher.
What is fast charging and how does it work
Expanding batteries
Now, the cells inside a lithium-ion battery will expand a little when it is being charged. This is because of the heat and is a completely normal process. It goes back to its shape when the electrolyte solution cools down, provided, it is not loaded with dead ions. To counter this and to give devices and their batteries a longer life, manufacturers have now started using split batteries. Instead of one huge battery with a capacity of, say, 5000mAh, some manufacturers are using two batteries of 2500mAh each.
What is fast charging and how does it work
Fast charging is a double-edged sword for most manufacturers and users. That is the reason why, most of the research and development around batteries now, is around managing the time taken to charge and ways to optimise battery health. With 240W fast charging on its way, it will be interesting to see how manufacturers improve ways to make batteries last longer, and how to maximise battery health.
Find latest and upcoming tech gadgets online on Tech2 Gadgets. Get technology news, gadgets reviews & ratings. Popular gadgets including laptop, tablet and mobile specifications, features, prices, comparison.
latest videos
Elden Ring Is A Great Game, BUT… I Elden Ring Gameplay
Here’s How PUBG New State Became The WORST Game Of 2021!
Here Are 5 REASONS Why ‘Call Of Duty Mobile’ FAILED In India I CODM
AMAZING News For The Indian Gaming Community! #Shorts #budget2022
The BEST Indie Games You Might’ve NEVER Heard Of!
Decoding PUBG: The MOST POPULAR Mobile Game EVER!
A New Journey Begins | 1Up Gaming
Hacker-Free Custom Rooms | No Hackers Allowed
Hacker-Free Custom Rooms | No Hackers Allowed
Is it finally time for BGMI Remastered?
Huawei
Huawei unveils industry’s first lithium-silicon battery to improve fast-charging

Itel it5311 launched as first feature phone with fast charging
Samsung
Samsung may release at least one smartphone with graphene battery by 2021: Report

Charge your smartphone from 0 to 40 in 10 minutes!

Qualcomm announces Quick Charge 4+ with cooler, faster and more efficient charging
Ather Energy
Why Ather Energy thinks sharing its fast-charging tech will boost electric two-wheeler sales in India
sharks
Shark teeth lost in Antarctica millions of years ago recorded Earth’s climate history
heat wave
Rising temperatures can cause heat waves: Here are three tips to prevent heat stroke
Dinosaurs
Earth was home to billions of T-rex over lakhs of generations, suggests new study
Coronavirus Hug
Nurse embracing patient in Brazil wearing ‘hug curtain’ wins World Press Photo of the Year
Copyright © 2022. Firstpost – All Rights Reserved.
Terms of usePrivacyCookie Policy

source

Share:

More Posts

Market Research

Pulse Surveys

Turn feedback into action

Our survey platform makes it easy to measure and understand feedback so you can drive growth and innovation

Pulse Handshak

Pulse Handshak

Collaborative online survey tool for the market research industry. Remote assisted surveying just like face-to-face interviews. Here interviewers can talk to the respondent over the web-console without the need for any other communication channel and share the same Q're with responses and click actions.

Pulse FE

Pulse FE

Pulse Field Expert or Pulse FE is the main platform for both offline and online survey at softofficepro.com. It is robust and used by hundreds of clients over tens of years with millions of responses. Do it once Q're and deploy on both offline devices (android) and online forms makes it a great cost effective platform for any kind of responses

Pulse Ultimate

Pulse Ultimate

Pulse Ultimate is targeted for tracking studies and retail audits. An offline survey system offering extreme field control including processes like data quality check, back-check, rework, comparison with previous wave data etc. helps to get the best results on a day-to-day basis

Pulse LS

Pulse LS

Use a managed Limesurvey and our expertise for creating complex forms and token based user management. Use optional mailing system to send survey invitation to each participant and track progress of the response status. Industry standard SPSS / R output supported