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Xiaomi Redmi Note 2 Charging Analysis

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By GeekEric, Account currently disabled on 27th August 2015, 06:58 AM
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Xiaomi has recently released their new smartphone, the Redmi Note 2. This new model comes with a 5.5-inch 1080p resolution display, and is powered by a Mediatek 2.2GHz 64bit Helio X10 Octa Core cpu with 2GB of RAM,3060mAh battery; It also comes with MIUI V7 (base on Android 5.0).

The power adapter for redmi note 2 is 5V/2A, and it also comes with 3.9ft (1.2m) micro usb cable.

We have got this device for few days, and busy testing the charging performance. We test with the original chargers, the tronsmart charges (wall charger and car charger) , and also the charger which support Mediatek Pump Express Plus.

Here are some simple results base on our test:

1)Total Chagring time from battery 0% to 100% is 2 hours 10 mins with stock power adapter and stock usb cable. detail table is here:

Time Battery
11:00PM-11:10PM 0%-10%
11:10PM-11:30PM 10%-25%
11:30PM-12:00PM 25%-52%
12:00PM-0:30AM 52%-78%
0:30AM-1:00AM 78%-96%
1:00AM-1:10AM 96%-100%


It can get 10% power in 10 mins charging, and 52% power in 1 hour. In 1.5 hours, it can get 78% power.and in reset times, it can get battery from 78% – 100%.

2) Redmi Note 2 don’t support Qualcomm quick charge or Mediatek Pump Express fast charge, and even Xiaomi offer 5V/2A power adapter, but the max charging current is just 1.38amp, and total charging watt is lower than 10W. see the photos here:


(for reference, the Oneplus Two also have 5V/2A charger, the charging current can reach 1.9amp and total charging watt is 10W., We also use the oneplus two charger to charge on redmi note 2, same result, max charging current is just 1.38amp) .so the problem is not the charger, maybe xiaomi lock the charging current in the software? for heat? for safe? or other reason?

Here is the photo for the stock charger:


and then we test with our wall charger and car charger, here is the information:

(1) test with one port qc2.0 wall charger


(2) Test with 3-port USB wall charger:


(3) Test with dual port usb car charger:



(4) Test with 4 port usb car charger



From the above test, you can see, all of our chargers can offer same current as the original xiaomi charger.

But the redmi note 2 can’t accept more current than 1.4amp. All of our chargers’ usb port can offer 2.4Amp charging current, however, redmi note 2 just can accept 1.4amp.

So if you are looking for some back up wall charger, and new car charger for your Redmi Note 2 smartphone. Our Tronsmart Charger series should be your first choice.





Some tips about charging speed:

The charging speed is decided by three part:

(1) How much current/volt the smartphone can accept?

(2) How much current/volt the charger can offer?

(3) Which usb cables are you using?

Please make sure to use the high quality usb cables, our tronsmart usb cables are all 20awg, can delivery high current.



Any questions about Redmi Note 2 charging, feel free to contact us.

Tronsmart


Source: http://www.tronsmart.com/?p=3644
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27th August 2015, 01:01 PM |#2  
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Thanks for the good review.
I assume it's not a problem at all: to prolongate capacity life it's recommended to charge at 0.5C.
Unless there's something new with li-ions, that I don't know.)

BTW, is this xiaomi using li-pol? Just curious.

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27th August 2015, 10:48 PM |#3  
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Thanks for the info.


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27th August 2015, 11:52 PM |#4  
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Is the rest of the phone any good?
30th August 2015, 09:03 PM |#5  
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Redmi Note 2 Prime
If you have a chance to test the prime version, it would be great. In any case, I will test the Redmi Prime Note 2 with your 3 port quick charger, when my phone arrives.

PS Was your test phone upgraded to the latest software release?
2nd September 2015, 08:23 AM |#6  
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Quote:
Originally Posted by city2026

Thanks for the good review.
I assume it's not a problem at all: to prolongate capacity life it's recommended to charge at 0.5C.
Unless there's something new with li-ions, that I don't know.)

BTW, is this xiaomi using li-pol? Just curious.

Sent from my HTC One mini 2 using Tapatalk

Don't understand your meaning very well, but i take a photo for the redmi note 2 battery, in case you guys are interested:


Quote:
Originally Posted by devilsking

Thanks for the info.

Gald for help

Sent from my iPhone using Tapatalk

Quote:
Originally Posted by LoneWolfSK

Is the rest of the phone any good?

In my opinion it's good, but we are mainly focus on the charging analysis, you can check other reviews in this forum.
Quote:
Originally Posted by Explore3

If you have a chance to test the prime version, it would be great. In any case, I will test the Redmi Prime Note 2 with your 3 port quick charger, when my phone arrives.

PS Was your test phone upgraded to the latest software release?

Yes, we plan to review the prime version, we will put more and more newest smartphone charging analysis in our channel. and yes, i have updated to the last software when i do the charing review.
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2nd September 2015, 09:09 AM |#7  
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Well, We just get the redmi note 2 prime version.
The accessories are the same as redmi note 2 standard version.

and we run some quick test, the charging current is also 1.38A, which is lower than 2A.
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2nd September 2015, 02:52 PM |#8  
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Quote:
Originally Posted by GeekEric

Well, We just get the redmi note 2 prime version.
The accessories are the same as redmi note 2 standard version.


and we run some quick test, the charging current is also 1.38A, which is lower than 2A.

Any noticeable difference with the normal version?

Inviato dal mio One S utilizzando Tapatalk
4th September 2015, 11:18 AM |#9  
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Quote:
Originally Posted by ZioRò

Any noticeable difference with the normal version?

Inviato dal mio One S utilizzando Tapatalk

seems faster than the normal version. but need more test.
7th September 2015, 11:15 AM |#10  
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2 hours for a 3000mah battery, not bad.
9th September 2015, 01:33 PM |#11  
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Awesome review! You have time to do some more testing?

And do I read it correctly that is doesn't really matter with what you charge the Redmi Note 2 with, it's all pretty much same same mAh that goes in, right?
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