Is 20W Wireless Charging or Qualcomm QC 4.0 "necessary"? - Xiaomi Mi 9 Accessories

Hello, my Xiamoi Mi 9 is arriving end of next week and I am pretty hyped!
I am really not sure, if I do need these mentioned charging techniques. Apparently you can charge your phone from zero to 100 below one hour. Is it good to charge a phone very often and that fast? Doesn't it heavily influence the battery life? Shouldn't you just use a slow charger and charge it only up to 90%?

hallohallo222 said:
Hello, my Xiamoi Mi 9 is arriving end of next week and I am pretty hyped!
I am really not sure, if I do need these mentioned charging techniques. Apparently you can charge your phone from zero to 100 below one hour. Is it good to charge a phone very often and that fast? Doesn't it heavily influence the battery life? Shouldn't you just use a slow charger and charge it only up to 90%?
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Well I don't think the charger influences battery lifespan, it's how you use the device that does
Most phone batteries are lithium ion batteries and honestly chargers (except fake ones) will not harm your battery regardless of charging speed, phones are built to handle them

If you continuously fast charge your battery, it will lower the lifespan of the battery over time. Unless you're planning to keep this phone for more than 4 years, it's not really that big of an issue. But charging speed does affect battery life.

What affects battery life is letting it go to 0% on Lithium. Just make sure you start recharging it around 10%-20% and you will make the battery last for a very long time.

Related

Battery on USB all day... Bad?

I have my phone plugged into my PC at work all day (USB) and rarely charge my phone outside of the office. Is this bad for the battery/phone? Anyone else do something similar?
I also did this with my OG EVO and battery life was 'okay' but never fantastic.
I know that the EVO 3D charges to 100%, then stops charging and drains itself about 5%, then charges again back to 100% while it stays plugged in. Maybe HTC kept this charging method?
fldash said:
I have my phone plugged into my PC at work all day (USB) and rarely charge my phone outside of the office. Is this bad for the battery/phone? Anyone else do something similar?
I also did this with my OG EVO and battery life was 'okay' but never fantastic.
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i always charge my phones (galaxy note and galaxy s3)via usb . we get better battery life by charging through usb and our phone charges faster (that is what i noticed) . enjoy !!!!
charismakid said:
i always charge my phones (galaxy note and galaxy s3)via usb . we get better battery life by charging through usb and our phone charges faster (that is what i noticed) . enjoy !!!!
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Errrr....I don't think its possible to charge faster of a USB, that the wall outlet. .5 amp from USB vs 1amp from the wall.
But I usually let mine drain to about 50% then charge it off USB the rest of the day.
It's not really bad for your battery, but it's not the best practice for a li-ion battery. The subject of how to best take care of li-ion batteries is incredibly complicated and ultimately way over my head, but speaking in general terms, two things that are always bad for your battery are voltage and temperature. leaving your battery on the charger exposes it to both (although to a lesser extent on a USB charger than an AC charger, since you're getting half as much current). when the battery is at a lower capacity, say 80% or so, the voltage going through it is probably closer to 4.1 or 4.0, as compared to roughly 4.2 when it's at 100%. anything higher than 4.1 is considered high. Deep discharges also tend to reduce battery life, so if you really want to eke every last drop of life out of your battery, I'd charge it up to full, take it off the charger and let it get down to 50-40% or so, and then start it charging again at that point.
There's lots more information available at http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries if you're interested; they go into a lot more detail.
Thanks for that post. It says to charge your battery more often is better and that full discharging is not good. I fit that pretty much as I use my phone 90% of the time at work and have it plugged in to USB. After work and overnight my usage is light, and my battery may drop to the 60-70% before re-charging it the next morning at work.
My biggest issue is over the weekend and letting it discharge too much.
One thing to note, is the battery in the EVO LTE is Li-Poly.

[Q] Charging the battery all the way to 100% is bad?

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Perform shallow discharges.
Instead of discharging to 0% all the time, lithium-ion batteries do best when you discharge them for a little bit, then charge them for a little bit. The table below, from Battery University, shows that discharges to 50% are better for your battery's long-term life than, say, small discharges to 90% or large discharges to 0% (since the 50% discharges provide the best number of cycles-to-usage ratio).
Don't leave it fully charged.
Similarly, lithium-ion batteries don't need to be charged all the way to 100%. In fact, they'd prefer not to be—so the 40%-80% rule you heard is a good guideline. If you do charge it to 100%, don't leave it plugged in. This is something most of us do, but it's another thing that will degrade your battery's health.
Fully discharge it once a month.
This may seem contradictory, but hear us out. While lithium-ion batteries shouldn't be discharged regularly, most modern batteries are what's known as "smart batteries". This feature can get miscalibrated after a lot of shallow discharges. So, manufacturers recommend fully discharging your battery once a month to make sure this stays accurate.
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Is this true?
you can be as neurotic as you like over this, but it really d doesn't make a lot of difference, just enjoy your phone.
Sent from an abused battery
The only big no no is to constantly discharge to below 5% and recharge . That according to the experts leads to a much shorter battery life .
Yes leaving on charge is a waste .
Wiping Battery stats does not improve battery life .
But all this is an old story posted time and again and bring nothing new .
jje
JJEgan said:
Yes leaving on charge is a waste
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It may be a waste but is it detrimental to the battery? I always plug my phone in when I go to bed and take it off the charger when I get up in the morning.
Chromag9 said:
It may be a waste but is it detrimental to the battery? I always plug my phone in when I go to bed and take it off the charger when I get up in the morning.
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there is a built in feature that stops charging once battery level reaches 100%. so there will be no harm to your battery. I have doing the same since gs1
My old Nokia 3510 needed a battery replacement after 4-5 years since it only held 3 days worth of charge instead of the usual 7-8.
I constantly let it discharge from 100% (overnight charging) to empty, the replacement battery cost me 5 bucks.
My Galaxy S1's battery has, after 2 years, no observable loss in capacity with overnight charging to 100% and dropping to 10-15% over 1-2 days.
A replacement battery would cost roughly 15 bucks.
I could go on the same about my Laptop, Netbook, Tablet and other devices with rechargeable Li-Ion batteries.
The point is; don't try to forcefully extend your battery life, enjoy your phone. Most people replace the phone every 1-2 years and the batteries are designed to live that long with high usage and deep-discharging. If yours should not or you plan to keep the phone longer, a replacement battery is cheap.
there is a built in feature that stops charging once battery level reaches 100%.
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All Lithium batteries have it (and need it) since there is a risk of damage, fire or even explosion when it is overcharged. That's why not the phone but the battery itself has the corresponding controller. Since the controller cannot measure the exact capacity of the battery (only an estimate), it is recomended to deep-discharge and fully charge (charge-cycle) the battery once in a while to reset the controller's counter.
Battery replacement is cheap and easy as abc. That's the benefit of having removable battery. Just enjoy your phone.
Sent from my GT-I9300 using xda app-developers app
So why do Sammy stop charging at 99%
Sent via TCP/IP
gsw5700 said:
So why do Sammy stop charging at 99%
Sent via TCP/IP
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Why don't you just read the thread and you will see the explanation?!
i have always been charging my samsung galaxy note and sIII overnight ever since i got them , i stil have great battery life !
akboiboi said:
i have always been charging my samsung galaxy note and sIII overnight ever since i got them , i stil have great battery life !
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Same here. No broblem.
Sent from my GT-I9300 using Tapatalk 2
Still no one answered my question... :silly:
Is the small 40%-80% charges better for the long-term battery life?

The most battery-friendly charging?

I really miss the option to turn off the fast charging (it is present on my Note 4, for example). I don't need the fast charging, because I charge the phone mostly at nights. And I'm almost sure, that the fast charging will degrade the battery more, than the regular charging.
The thing is, the Mate 10 isn't officially available in my country, so I will not be able to change the battery (don't really want to disassemble it myself).
What do you think, will it be preferable to use my Note 4 charger (Mate 10 should use it as a regular 5V/2A charger), or maybe the native Huawei charger may somehow be more friendly? Maybe, any recomendations?
Btw, did batteries get any better in the past 3-4 years? Can I expect the Mate 10's battery to degrade slower, than the Note 4's battery? (it degraded noticably in a year, even without a fast charging)
DoubleThinker said:
I really miss the option to turn off the fast charging (it is present on my Note 4, for example). I don't need the fast charging, because I charge the phone mostly at nights. And I'm almost sure, that the fast charging will degrade the battery more, than the regular charging.
The thing is, the Mate 10 isn't officially available in my country, so I will not be able to change the battery (don't really want to disassemble it myself).
What do you think, will it be preferable to use my Note 4 charger (Mate 10 should use it as a regular 5V/2A charger), or maybe the native Huawei charger may somehow be more friendly? Maybe, any recomendations?
Btw, did batteries get any better in the past 3-4 years? Can I expect the Mate 10's battery to degrade slower, than the Note 4's battery? (it degraded noticably in a year, even without a fast charging)
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You can control battery degradation with accubattery on playstore. Very great app.
Better to charge to 80 % max in order to degrade battery slower.
App gives good advices et a lot of infos.
Moreover, yes, supercharger probably degrade battery a bit faster but I think it's negligible
sonydesouza said:
You can control battery degradation with accubattery on playstore. Very great app.
Better to charge to 80 % max in order to degrade battery slower.
App gives good advices et a lot of infos.
Moreover, yes, supercharger probably degrade battery a bit faster but I think it's negligible
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Thanks, but I don't see it a handy solution, to be honest. I charge the phone at night, so I can't stop the charging at 80%.
DoubleThinker said:
Thanks, but I don't see it a handy solution, to be honest. I charge the phone at night, so I can't stop the charging at 80%.
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It's the point.
It's a mistake!
sonydesouza said:
It's the point.
It's a mistake!
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We're automatizing anything we can, and you're suggesting to wait for a notification everytime I charge, to pull of the charging cable. Wrong or not, but I'll stick with the "plug in and forget" option, cause its really easier to disassemble the phone once in a 1.5-2 years and change the battery, than to wait it charging to 80% every other day So, the questions about the charger selection and battery improvements in past 3-4 years remain open
DoubleThinker said:
We're automatizing anything we can, and you're suggesting to wait for a notification everytime I charge, to pull of the charging cable. Wrong or not, but I'll stick with the "plug in and forget" option, cause its really easier to disassemble the phone once in a 1.5-2 years and change the battery, than to wait it charging to 80% every other day So, the questions about the charger selection and battery improvements in past 3-4 years remain open
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Ok as you want dude but honestly have a normal charger is useless..
Are there any studies that prove that fast charging can degrade the battery performance faster?
A shower and breakfast is all the time it takes to charge to 80%.
worldsoutro said:
Are there any studies that prove that fast charging can degrade the battery performance faster?
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Speaking as an electronics engineer (and not as an expert on batteries), I'd suggest that "slow and steady" will always be kinder to the battery, no matter how much technological work has gone into preventing the battery from destroying itself through fast charging.
Keep the SuperCharge charger that came with your 'phone handy in case you need an emergency top-up, but for overnight charges use an el-cheapo 1A USB charger. It'll be more than enough to bring you to 100% by the morning, and there'll be no chance of crystallising/drying-out the battery's electrolyte.
Cephalus said:
Speaking as an electronics engineer (and not as an expert on batteries), I'd suggest that "slow and steady" will always be kinder to the battery, no matter how much technological work has gone into preventing the battery from destroying itself through fast charging.
Keep the SuperCharge charger that came with your 'phone handy in case you need an emergency top-up, but for overnight charges use an el-cheapo 1A USB charger. It'll be more than enough to bring you to 100% by the morning, and there'll be no chance of crystallising/drying-out the battery's electrolyte.
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You're probably right but science proves now that the most important thing in order to maintain battery is to charge it to 80 % max.
Your point is to be kinder to the battery right?
Better way is to charge it less than fully.
But, anyway, you're want to be stubborn ?. So, buy a normal charger, charge phone fully the night and don't cry after if you're battery doesn't work well.
And to answer to your "question" better is to buy a huawei charger if you don't want for sure any problem...
its not a good maner to compare note 4 with mate 10
samsung usually uses low quality batteries in cell phones
but after s6 and note 5 it improved the quality
about huawei's batteries
the batteries are in high quality state
my brother has huawei honor 3c lte. he bought it around of 5 years ago. after years we couldnt realize a significant weakness.
so dont worry about mate 10 and its super charge
im sure that your device will be working in a good condition

[App suggestion] Battery Charge Limit

This is app is a must have and thought I'd share. Like everywhere I have read, they say battery should not be charged to 100%, it will hurt the battery somehow. This app "Battery Charge Limit" automatically (with root) stops charging the phone at whatever percent you want and starts charging back up at whatever percent you want. So you can always stop before it hits 100. It can be used without root but it only notifies you and you have to manually unplug the phone to stop charging. Better with root since its automatic.
https://play.google.com/store/apps/details?id=com.slash.batterychargelimit
Ndaoud360 said:
it will hurt the battery somehow.
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Don't charge to 100%
Slow charge only
Don't quick charge
Don't use wireless charger because it heats up the battery
Lower brightness to 10% for best battery life
Disable wifi/lte/nfc/bluetooth for best battery life
...
Enjoy your $1000 phone!
peachpuff said:
Don't charge to 100%
Slow charge only
Don't quick charge
Don't use wireless charger because it heats up the battery
Lower brightness to 10% for best battery life
Disable wifi/lte/nfc/bluetooth for best battery life
...
Enjoy your $1000 phone!
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Keep it turned off for a better batter longevity ??
Damn thos people are more preocupied of how to prevent the battery wear than actually enjoying this amazing phone
Well coming from an HTC device where after like what 6 months, my battery starts dying much quicker and hopefully this app and the nature of Samsung makes my phone battery last longer. Never owned a Samsung, so I don't know how the battery lasts over time.
This is a myth, modern phones already prevent damage from overcharging with the charge controller in the phone. Fast charging and slow charging also does not make a difference in battery longevity.
Just use your phone like a phone.
Yeah no
@nukeclears you need to bone up a bit more on battery chemistry before making statements like this. Overcharging is very different from charging to 80%. That's why Apple just implemented a charge limit in ios13 and Tesla strongly recommend charging to 80/90% max for daily use. Samsung just don't want to do this because they haven't felt enough pressure. I'll bet they implement it on the S11 and then for all phones by the end of the year.
Tab S4 has a setting to stop charging at 80%
You guys do need to go through all this? For what?
I have a Note 3 with battery since 2014 or 15, it still gives me the same power, sometimes it's better than it first was.
Charging fast/slow doesn't affect anything, I'm doing so for years.
I really don't think batteries die, if you felt it's weakening, just change OS, not the battery.
Samsung themselves, on the s10 series, suggest to charge from 30% to 80% everytime you need a charge.
In my daily usage, stopping charge to 90% is enough and I have all the juice i need till the next day.
If you are rooted, Battery Charge Limit app can be very useful to optimize the life of your battery (remember: battery is the first hardware component that ages your phone). On my 2015's Sony phone, they wanted me to pay 75 euros for battery replacement...
This thread is full of people who know nothing of batteries.
I bet your phone battery does "feel" the same after years when your os pushed that update that permanently limited your frequencys lmao.
peachpuff said:
Don't charge to 100%
Slow charge only
Don't quick charge
Don't use wireless charger because it heats up the battery
Lower brightness to 10% for best battery life
Disable wifi/lte/nfc/bluetooth for best battery life
...
Enjoy your $1000 phone!
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Click to collapse
Enjoy replacing it every year because phone batteries are becoming more commonly HARD GLUED into place. So go ahead, switch the whole phone out.

Question What affects charging time

Hi
Just bought a GT Neo 2 but didn't get the Realme 65W charger. I do have a Samsung EP-'T4510 USB-C Quick Charger 45W + USB-C Cable.
It's obviously not going to charge the phone as fast as an original 65W charger does but it's not charging as fast as I'd expect. Plugged it in earlier at 49% and it was at 91% 40 minutes later.
So what affects charging time?
Charging set up as follows:
1) Using extension lead
2) Using adapter to convert 2 pin EU charger to UK 3 pin
3) Samsung T4510 (45W) and the cable that came with the T4510
Do the extension lead or adapter affect charging time? Also does the cable affect it? Do fast chargers have to be used with a specific type of cable?
The charger/cable has to support the charging protocol of the phone or it will only slow charge.
Best to use a OEM brick/cable no longer than 3 feet.
Battery temperature needs to be high enough at beginning of the charging cycle for fast charging to engage. Minimum 72F, but 82-90F is best.
Fast charging may engage below 72F but Li plating becomes likely. Below about 55F fast charging will likely be disabled.
Above about 103F or about 80% capacity fast charging with be ramped down or disabled.
If screen is on, fast charging is disabled.
A battery fault will also disable it or cause erratic fast charging ie a battery failure.
blackhawk said:
The charger/cable has to support the charging protocol of the phone or it will only slow charge.
Best to use a OEM brick/cable no longer than 3 feet.
Battery temperature needs to be high enough at beginning of the charging cycle for fast charging to engage. Minimum 72F, but 82-90F is best.
Fast charging may engage below 72F but Li plating becomes likely. Below about 55F fast charging will likely be disabled.
Above about 103F or about 80% capacity fast charging with be ramped down or disabled.
If screen is on, fast charging is disabled.
A battery fault will also disable it or cause erratic fast charging ie a battery failure.
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Thanks for that.
G1032 said:
Thanks for that.
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Sorry @blackhawk
One more question if you don't mind. Will charging the GT Neo 2 with the Samsung charger damage or reduce the lifespan of the Realme battery?
G1032 said:
Sorry @blackhawk
One more question if you don't mind. Will charging the GT Neo 2 with the Samsung charger damage or reduce the lifespan of the Realme battery?
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Click to collapse
Fast charging produces more heat therefore will reduce the lifespan somewhat.
On my heavily used Note 10+ I now replace the battery every year or so to help prevent a battery failure, routine maintenance.
The charging curve is controlled by the phone not the charger. The charging curve should be near identical if both bricks supple the required peak voltage/amps and the phone power controller can communicate with the brick.
Thank you kindly. Much appreciated.
G1032 said:
Thank you kindly. Much appreciated.
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You're welcome. Play with it to see how it works.
Start the charge at about the same temperature then time how long it takes to gain 1 or 2% without turning on the main display. Watch when it ramps down during the charge cycle. It will vary but I see 2%@minute sometimes a little faster at the peak fast charging rate on the N10+.
To extent battery life limit discharge to 30% and top charge to 80%. Li's like frequent midrange power cycling; it extents their totals full charge cycles many fold. A 40-67% usage range is near ideal. Limit the current draw; higher current usage stresses the battery more as does back to back discharge/recharge etc cycles with no rest period.
That's one reason it's just easier to replace the battery. When an Li reaches 80% of its original capacity it's considered degraded and has reached the end of its useful service life. It should be replaced. Degraded Li's are more likely to fail which can seriously damage the device.
Any battery swelling is a failure, replace immediately.
blackhawk said:
You're welcome. Play with it to see how it works.
Start the charge at about the same temperature then time how long it takes to gain 1 or 2% without turning on the main display. Watch when it ramps down during the charge cycle. It will vary but I see 2%@minute sometimes a little faster at the peak fast charging rate on the N10+.
To extent battery life limit discharge to 30% and top charge to 80%. Li's like frequent midrange power cycling; it extents their totals full charge cycles many fold. A 40-67% usage range is near ideal. Limit the current draw; higher current usage stresses the battery more as does back to back discharge/recharge etc cycles with no rest period.
That's one reason it's just easier to replace the battery. When an Li reaches 80% of its original capacity it's considered degraded and has reached the end of its useful service life. It should be replaced. Degraded Li's are more likely to fail which can seriously damage the device.
Any battery swelling is a failure, replace immediately.
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Click to collapse
That's all very interesting. I have often read about the 30 - 80 range. I used to own a Huawei P9 and always charged to 100 and that battery didn't last more than 2 years. Last phone was an A70 and that'll be 3 years old in June. Started getting random reboots recently and a quick Google said that's most likely down to the beginning of a battery failure. So just got this GT Neo "as new". It was obviously sent back to the online store by original purchaser minus the charger (replaced with a 5V 2.1A charger. Store had no OEM charger listed on site for sale so I agreed to take a the EP-T4510 charger. While it's not ideal that I won't be getting the fast charge of the OEM charger, it's far from a major issue for me, as long as I'm not going to damage the battery with it and I doubt I will. Even less of an issue if all I really need to do is keep it between 30 and 80.
I've read also that a complete discharge every once in a while is recommended but not sure how accurate that advice is.
G1032 said:
That's all very interesting. I have often read about the 30 - 80 range. I used to own a Huawei P9 and always charged to 100 and that battery didn't last more than 2 years. Last phone was an A70 and that'll be 3 years old in June. Started getting random reboots recently and a quick Google said that's most likely down to the beginning of a battery failure. So just got this GT Neo "as new". It was obviously sent back to the online store by original purchaser minus the charger (replaced with a 5V 2.1A charger. Store had no OEM charger listed on site for sale so I agreed to take a the EP-T4510 charger. While it's not ideal that I won't be getting the fast charge of the OEM charger, it's far from a major issue for me, as long as I'm not going to damage the battery with it and I doubt I will. Even less of an issue if all I really need to do is keep it between 30 and 80.
I've read also that a complete discharge every once in a while is recommended but not sure how accurate that advice is.
Click to expand...
Click to collapse
Li's are born to die; they start degrading the moment they're assembled. Don't go too nuts, just replace them as needed.
Until I watched someone replace my N10+ battery I was very concerned. However I realized it's relatively easy with the right skillset and tools.
Mind you they say the N10+ is one of the more difficult ones to replace... meh.
Now I don't really think much about it.

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