fast charging - Samsung Galaxy S9 Questions & Answers

Fast charge doesn't seem to be working for me.
I'm coming from a Moto X style with rapid charge and it took about an hour to charge if that but Jesus this phone is slow to charge up.
I've even turned the fast charge on and off and I get about 10mins difference, is there something wrong or is Samsung's fast charge just rubbish?

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[Q] Charge Time

New to smexyphones... I've been charging from 1% to 100%... it seems it only takes 2 hours~ to charge full for this big battery oO. This sound about norm? Using wall charger. How does yours compare?
The phone lasted around 19 hours before reaching 1% from 100%, this with quite a bit of active use!
It's the new quick charge tech by qualcomm, the G2 was the same way. Super ridiculous fast charging.
Sent from a giant phone

Very slow charging

Anyone else notice that with the supplied charger charging ins't what it should be. My iPhone 5 charged almost twice as fast as this phone. I find it kind of annoying. I did order one of these chargers hoping that solves the issue.
http://www.amazon.com/gp/product/B00HPTU00E/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
The supplied charger is charging rapidly no doubt.
I guess not less than 1% per minute - particularly when below 70%..
jauhien said:
The supplied charger is charging rapidly no doubt.
I guess not less than 1% per minute - particularly when below 70%..
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No its not. Especially when your using the phone and its on 5% plugged in. Takes forever to reach 6%.
I'm having literally no issues with charging from dead to 25% in about 15 minutes. 2 hours to 100% im very happy with the speed of charging and this is using my m8 charger as the m9 one is still sealed in box.
Sent from my D5803 using XDA Premium HD app
MattMJB0188 said:
No its not. Especially when your using the phone and its on 5% plugged in. Takes forever to reach 6%.
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I went with this one and it working like a champ, 30% to 100% in 50 min
https://www.amazon.com/gp/product/B00QTJZ3D0/ref=od_aui_detailpages00?ie=UTF8&psc=1
I've been using the GS4 charger, with a high output cable. The Samsung charger is 1.5A where the HTC m8/m9 charger is 1.0A
the supplied charger is definitely giving 1.5 amps to mine. charges up pretty quick. with a quickcharge 2.0 charger it's crazy fast to charge.
One thing to note is it will take a faster charge the lower the battery level is, which means more heat. if you're also gaming with it, you could be bumping against the battery charging cutoff temperature. I only ever saw this happen on my Tegra HOX+. IIRC HTC has the notification LED blink in alternating green and orange/red when this happens. I'm guessing you would have mentioned temperature in the OP if this was the case, but I figured I'd bring it up.
gonzo237 said:
The Samsung charger is 1.5A where the HTC m8/m9 charger is 1.0A
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Just spread your arm, pick whether HTC M8 or M9 charger, and read upon it.. 8)
Both M8 and M9 chargers are - 1.5 Ampere.. furthermore both handhelds are charging fast - otherwise if the cable is a problem..
jauhien said:
Just spread your arm, pick whether HTC M8 or M9 charger, and read upon it.. 8)
Both M8 and M9 chargers are - 1.5 Ampere..
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Sorry, meant it was 1.5a for HTC and 2.0a for the Samsung one. Didn't have them on hand to check.
iPhone 5 battery is 1,440 mAh... M9 battery is 2,840 mAh. 50% charge of Iphone battery doesn't equal 50% charge of M9 battery, in terms of charge time.
I believe the rate of charging to decrease while you use it to prevent the phone from overheating. (My M8 does this as well)
My stock charger is fast, and my quick charge 2.0 is crazy fast.
MattMJB0188 said:
No its not. Especially when your using the phone and its on 5% plugged in. Takes forever to reach 6%.
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If you are using your phone and charging at the same time, it will take longer to charge....
as someone who had a nexus 6 with turbo charging. this is bad. charging is so slow.
joetang97 said:
If you are using your phone and charging at the same time, it will take longer to charge....
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I got a qualcomm 2.0 charger and now its super fast.
MattMJB0188 said:
I got a qualcomm 2.0 charger and now its super fast.
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Yeah, this. I got an HTC Rapid Charger 2.0 for it just to be sure since I knew with certainty it's Quick Charge 2.0. In retrospect perhaps not the best move considering I'm essentially incentivising HTC for not including one in the box from the get go, but whatever.
MattMJB0188 said:
No its not. Especially when your using the phone and its on 5% plugged in. Takes forever to reach 6%.
Click to expand...
Click to collapse
Yup i got the same issue gonna take me 6-11hrs to charge and its very slow charging
I had a similar problem to OP. The second night I had my phone I plugged it in at 11 pm with about 5% battery left and went to bed. At 5:15 the next morning (6 hours later) it was only at 85%. I can't tell if there's still a problem or I just think there is because I'm paranoid about it now. I haven't run my battery down that low since, and looking at the charge current with Ampere seems somewhat inconclusive. I may have to run it down and then keep an eye on it while charging to see what's going on.
Something IS wrong with SOME M9 phones (I think)
I have one of the "bad" ones. Mine takes hours and hours to charge, whether on the cable and plug that came in the box, or on any others that I have around - some I know are 2 Amps. I think there is something seriously wrong with some of these phones, based on what I am reading in this thread, and on my own example. I have had my M9 for just a few days.
I'd like to post a follow up to this thread after having the phone for a couple of weeks now.
I've had several occurrences where my phone didn't fully charge overnight. The worst was a few days ago, I plugged it in at 5% and the next morning (6-8 hours) it was at 1%, it actually lost charge. I noticed before unplugging it so I looked at the history in Battery Widget Reborn and it showed the battery level just slowly dropped from 5% to 1% without any jumps or dips. The battery icon at the top of the screen showed it was charging but it died at that point so I didn't get a chance to open Ampere.
I think it's the charger (and/or the cable) that came with the phone. I've tried several other chargers that have all worked reliably:
- The QuickCharge 2.0 charger that came with my wife's S6 charges my phone really fast.
- I have a Kmashi external battery that also seems to charge it relatively quickly.
- Two older chargers that are several years old (both rated 5 volts at 0.7 amps) charge it from around 30% to full in 3-5 hours.
At first I thought it might have been a wakelock problem, but the battery has been dropping so slowly when the phone is just sitting in my pocket that I'm confident now that it's not wakelocks. I don't know if HTC is likely to send a replacement, but I'm going to stop into the Verizon store that I got the phone from to see if they'll replace it.
Gilligan
My phone is also odd when charging.
Half of the time it takes 6 hours or more to charge. If I look at GSAM battery monitor it shows a charge current of around 350mA. If I then unplug the charger and reconnect after 15 seconds I get over 1300mA charging current, most of the time. (It takes GSAM a while to show an accurate reading). Occasionally it will take a few tries to get it right. Once I get a good reading over 1300mA the phone will charge in 1.5 hours like it should.
Something very buggy about this phone's charging circuit. I get the same behaviour with all chargers and cables, even my battery bank.
MattMJB0188 said:
Anyone else notice that with the supplied charger charging ins't what it should be. My iPhone 5 charged almost twice as fast as this phone. I find it kind of annoying. I did order one of these chargers hoping that solves the issue.
http://www.amazon.com/gp/product/B00HPTU00E/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Click to expand...
Click to collapse
I use a 2A tablet charger from my hp touchpad. Charges from dead to 100% in 45 minutes.

Speed charge stopped after Nougat upgrade

Rapid charger stopped after Nougat upgrade it shows two lighting bolts but it charge too slow it takes 4:30 hours to full charge !
I use orginal charger directly in the wall
Are you using the phone when it's charging? Fast charging stops if the screen is on.
Looks like there's a small bug for Rapid Charging after Nougat OTA.
The rapid charging is either stop working or charging at slow rate or even stop charging at 95%.
To solve:
1) While P2 is being charged using the stock Rapid/Rocket Charger, just reboot/restart P2.

Oem charger heat up the phone?

I just bought an use xl. The oem accesories were never used seems he was charging the pixel mostly in his car. Now im using the official oem charger and cable and heat up the phone like crazy. It does say rapid charging but even the time went up to 3 hour estimated time to fully charge which is crazy. Now using a galaxy s7 edge dock charge and some spare usb c cable i had the phone does not heat up,. Charge in quick charge and it take like an hour and 20 minute to fully charge..... Im i missing something here?
Charging time left is not static it changes with temperature. If your phone is already reached 42 45 degrees which generally correct it slows down charging. And also it heats up if you are using your phone during fast charging intervals which is first 20 min. Also even when you don't use it, it heats up because of wake locks (charging). Also i realize a hot climate is a factor. For oem charger it can reach 3 amps so it is normal for heating and most other chargers supply less so it does not heat up. Soo it is like a design problem you can charge your phone super fast but it will heat up so charging speed will vary but i think in the end it will still quick enough.
Why do you think they advertise quick burst charge instead of quick full charge ?

No fast charging after battery change Mi 10T Pro 5g

Hallo everyone... Can someone pls tell me what could be the problem that i don`t have fast charging anymore after changing the battery on my phone? I bought original battery in local phone service and i saw that it is the same as the one that came with the phone. Before changing charging was as fast as it was from the start, about 1h 0-100%... But battery health was half way through and not lasting that long during the day. Now, it needs almost 2h30min to charge it. When i plug in cable it says on animation turbo charge like it should but charging is just around 5-7w according to Antutu battery test and i know it was 30w before. What is interesting to me, and i haven`t noticed that before since it might not have had anything to do with how fast it charges, is when i plug in cable one way no fast charge message, just starts charging. But when i turn it 180 degrees, so opposite way, it shows fast charge but as i said, it`s not charging fast at all. Any idea pls? Thanks

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