Original topic:

S21 Ultra Charging or Slow Charging issue ?

(Topic created on: 04-14-2021 01:46 PM)
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Anak1n
Active Level 6
Options
Galaxy S
 Please see in attached screenshot, the phone is charging in HIGH and LOW form upto 50%. What I meant, it charges with high current for certain duration and then it charges with low current for certain duration. 
 Why it is not charging with high current for long duration . It does charges flat for longer duration but after 50% and till 60 or 65%. 
 Do note - All background apps are closed, no apps open, all wifi GPS is off, no use of phone in between in charging. 
Please consider me as above average User, so I have kept all this thing checked already, Name it and I would have already did it. 
 Device is not even 2 week old. And this behavior is seen consistently in every charge cycle. 
 Is this expected charging algorithm from Samsung? 
 Why it does not charge Flat with high current for longer duration, as explained above? Device - S21 Ultra and Charger - 25W Samsung charger .
Anyone can share this Charging graph for their's device, here Please??

image


22 Comments
Aditya004
Active Level 4
Galaxy S
Oo.
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sanchit91
Active Level 2
Galaxy S
Which app is this?
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Anak1n
Active Level 6
Galaxy S
Battery Guru
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s4s
Active Level 7
Galaxy S
I think it may be by design too.

In general, the charging usually happens with 3 phases for extending battery life time.

Fast charge with high current (50 to 70%)
Slow charge with low current (upto 90 or 95)
Trickle charge (rest upto 100)

Different manufacturers pick different limits for the above which can give maximum battery life time.
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Anak1n
Active Level 6
Galaxy S
That's correct, but above graph is for charging between (1 to 50%). And, it is supposed to fast charge between that period. Instead, it keep switching between high current(5000mA) and low current (1500mA), till battery is charged upto 50% .
Let's assume input voltage for charging is 5V and if current is 5000mA, then your device is getting charge with 25W charge speed. Similarly, for LOW current of 1500mA, device gets charged with 7.5W.
I understand, the charging pattern of high-low current between 1-50% charging, is may be due design or some algorithm. I just wanted to confirm if others are experiencing same things or if maybe Samsung can confirm this.
Attached screenshot for 100% charge for better clarity.
YELLOW cloud is - Pulse mode charging (High/Low Pattern)
GREEN - Flat HIGH current/ Fast charge
PURPLE- Slow charge
Red - Trickle charge

Total charging period is 84mins aprrox for 100% charge. Instead of 60-70mins as claimed by samsung and many users/youtubers.
I am just not able to understand YELLOW PART. This is new to me 😄

20210415_003742_14539.jpg

sagarb
Active Level 5
Galaxy S
I dint understood all these voltage stuff.but as far charging my s21 ultra device goes to 50 to 53 in 30 min and 100 in 1hr 8min or 10 min.
Anak1n
Active Level 6
Galaxy S
Can you please share, screens shot of charging here from battery guru App. Start charging around 10% till 40 or 50% or more. And, Don't use phone while charging or Hotspot or anything... it's slows down charging..
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Samsung_Support1
Moderator
Moderator
Options
Galaxy S

Dear Samsung Member,


Greetings from Samsung Customer Support!


Please visit this mentioned link to resolve your charging related issue: https://www.samsung.com/in/support/mobile-devices/battery-not-charged-charging-related-issue/#:~:tex...

 

For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).


Thank you for writing to Samsung.

 

Warm Regards,
Samsung Customer Support

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Anak1n
Active Level 6
Galaxy S
I did that first, and I was told, support team will be back with an answer or solution. But they haven't responded back after that. Slow response from Samsung support.
So, I posted same query here, looking for response from community.
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