Charging Mobile Phone

jamesyang68

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Sep 3, 2018
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Why at certain level using 2amp is faster then 3amp charging mobile phone.
I tried when percentage level is 88% and 77%.
They show the same result.
Using a 2A charger with 2A cable is producing more mAh compared to using a 3A charger with 3A cable.
2A is producing 990mah while 3A is 280mah.
I am using Samsung S9 plus.
Your reply is very much appreaciated.
 

Hermes Hidayat

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Feb 6, 2017
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Why at certain level using 2amp is faster then 3amp charging mobile phone.
I tried when percentage level is 88% and 77%.
They show the same result.
Using a 2A charger with 2A cable is producing more mAh compared to using a 3A charger with 3A cable.
2A is producing 990mah while 3A is 280mah.
I am using Samsung S9 plus.
Your reply is very much appreaciated.

erm is your S9 Plus the SD or Exynos version?
charging from 77% or 88% wouldnt make much difference.try from 15%.

in my case i have the Exynos version and charging with either Samsung Adaptive charger or QC3 charger shows almost the same voltage and amperage.btw what you use to check?
 

Mooncatt

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That temp is starting to get warm. Not dangerous, but maybe warm enough for the OS to start throttling the charge rates (I know LG is bad about that). What's the temp like when using the other cable? Also, slow charging performance is a sign of a cable going bad, due to weak connections inside it. So I wouldn't rule that possibility out too.
 

Rukbat

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Using a 2A charger with 2A cable is producing more mAh compared to using a 3A charger with 3A cable.
2A is producing 990mah while 3A is 280mah.
First, understand the terms you're using.

2A is 2000mA, 3A is 3000mA (m is 1/1000), not mAh, you don't charge with mAh (that's a measure of how long you can draw that number of ma) you charge with mA. (A is capitalized because it's the initial letter of Ampere's name.)

A 2A charger can supply as much as 2000 mA, a 3A charger can supply as much as 3000 mA, but it's the phone that determines how much the phone draws.

Check the chargers. If one is 5 Volts and the other is 5/9 or some other indication that it can put out both 5 Volts and 9 Volts, that one is a quick charger, while the one that puts out only 5 Volts isn't - and it's the voltage that's making the difference in how much the phone is drawing.
 

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