Zenfone 2 (ZE551ML) Charging Analysis

HI Guys

Today we will do a charging analysis for Zenfone 2, Model: ZE551ML.

Zenfone 2 has a 3000 mAh Li-Polymer battery and support boostmaster technology, which is compatible with quick charge 2.0. and Qualcomm also list Zenfone 2 as supported device in their official site.
The model we test is ZE551ML, 4G/32G, We are surprising to see ASUS don’t include the fast charger in this model, just regular charger, here is the photo:




The standard charger just can offer 5.2V/ 1.35A. and ASUS includes a short usb cable ( about 0.9cm length) , see here:



and we test the no-load volt for the stock charger, see here:




Now we begin to test the total charging time with stock 5.2V/1.35A power adapter and usb cable. We have made our Zenfone 2 battery to 0% and here is the test result:

Time Battery level Volt Current
PM 1:34:00 0 4.9V 1.13A
PM 1:44:00 Battery is low, can’t power on to show the battery level
PM 1:54:00
PM 2:04:00
PM 2:14:00 23% 4.9V 1.13A
PM 2:24:00 29% 4.92V 1.12A
PM 2:34:00 36% 4.92V 1.12A
PM 2:44:00 43% 4.92V 1.1A
PM 2:54:00 49% 4.92V 1.1A
PM 3:04:00 55% 4.92V 1.1A
PM 3:14:00 61% 4.92V 1.1A
PM 3:24:00 68% 4.92V 1.1A
PM 3:34:00 74% 4.92V 1.1A
PM 3:44:00 80% 4.93V 1.03A
PM 3:54:00 86% 4.97V 0.8A
PM 4:04:00 90% 4.97V 0.75A-0.55A
PM 4:14:00 94% 5.02V 0.38A
PM 4:24:00 97% 5.02V 0.32A
PM 4:34:00 99% 5.04V 0.2A
PM 4:41:00 100% 5.08V 0.16A


The total charging time is 3 hours 7 mins with regular charger, and you just can get 20% battery in 30 mins (PS: we found an interested thing, the zenfone 2 can’t be powered on if the battery is lower than 20%, i am not sure if it is my phone problem or you guys also have this problem?). After charging for 1 hour, we just get 36% battery, charging 2 hours, we get 68% battery, charging 3 hours, the battery is almost full. The Charging current will become smaller as the battery growing. but max, you just get 1.13A. Here is a photo we take when we test:


Frankly speaking, If we don’t test with quick charge 2.0 chargers, we might think the charging speed is OK, Most people might think they just leave the phone to charge overnight, and if it can charge full during the sleep, then it is ok. :) However, if you tried with quick charge 2.0 chargers, i thought you should change your mind.



Now we begin to test with our chargers and cable:

Test with Tronsmart WC1Q wall charger (Qualcomm Certified, support quick charge 2.0), and Tronsmart USB cable (20AWG support high current):



Time Battery level Volt Current
AM 8:45:00 0% 9.15V 1.65A-1.56A
AM 8:55:00 Battery is low, can’t power on to show the battery level
AM 9:05:00 27% 9.15V 1.5A
AM 9:15:00 43% 9.15V 1.5A
AM 9:25:00 54% 9.16V 1.32A
AM 9:35:00 68% 9.19V 1A
AM 9:45:00 77% 9.19V 0.87A
AM 9:55:00 84% 9.2V 0.62A
AM 10:05:00 88% 9.22V 0.39A
AM 10:15:00 92% 9.23V 0.28A
AM 10:25:00 95% 9.23V 0.17A
AM 10:35:00 98% 9.23V 0.16A
AM 10:45:00 100% 9.23V 0.14A


With our chargers and cable, we get zenfone 2 from 0% to 100% in 2 hours, When it detects Zenfone 2 support quick charge 2.0, our charger just give 9V volt instead of 5V. and you get 54% battery in the first 40 mins, and in 1 hour, you get 77% battery. (while with stock standard charger, in the same time, you just get half battery). Our chargers can give 15W power to zenfone 2 at first, while the regular charger just can give 5W. That’s a big difference. We also can see in the above table, while use our charger,in the whole charging progress, Zenfone 2 always get 9V high volt , but the charging current is becoming smaller as the battery growing.

We take a photo after charging a while with our charger to show the quick charge:


So from the above testing, we can see, use our quick charge 2.0 charger, you can save 36% total charging time , it can offer double battery level at the first 1 hour compare with regular charger. Like Qualcomm said, Less time charging, More time doing. And not just our wall charger, our quick charge 2.0 car charger also support Zenfone 2, you can get similar charging time when you use our quick charge 2.0 chargers.

In the end, Here is our suggestion to charge your Zenfone 2 faster:

1 If your zenfone 2 don’t equipped with a fast charger, just get one asap :)

2 Pick up some high quality usb cables, it do effect the charging, i take a photo to compare our usb cable and asus one:


Source: http://www.tronsmart.com/?p=4211

Zenfone 2 ZE551ML Boost Charging not functioning

From the last 2 days my zenfone 2 ZE551ML has stopped charging in the Boost Mode apart from this normal charging is also taking too long. It's the stock zenfone 2 updated to latest firmware OTA. Please suggest the solution at the earliest.

ZenFone 2 Pre Root UnRoot (ZE551ML) HELP!

Well i rooted and flashed a System.img with FastBoot and i want to know how can i unroot because i want to try out the 1 click method then upgrade to the latest version V2.20.40.90 i dont have a linux computer so i got the system.img online also i am planning to unlock the bootloader so i can use twrp

My ZenFone 2 ZE551ML (CN)

1080p Screen
32GB of Internal Memory
4GB of RAM
1.8GHz Intel Atom CPU

I Flashed it with Fastboot with the WorldWide ROM to get it to work for me in Canada and it works but i want to update since there is alot of issues that the new update will fix but i still use alot of root since i use root uninstaller and Titanium Backup and alot of Root Benifit like moving the app to system apps and freezing and my favourite remove the Bloatware

If you guys need the System.img to check it out if its broken or something tell me and i will upload it to my MEGA Account or DropBox or OneDrive or Google Drive if any of these are blocked in you country but this is only for look at and i dont know if i am going to break the rules but sorry if i did but i am really in need since my phone i am doing new stuff and the OS is starting to get buggy and also the flash look horrible and the update fixs it


Also if anybody can make me a PreRooted System.img for (ZE551ML WW 2.20.40.90)

ZE551ML: Extreme Battery Drain... battery failing ?

Running the latest OS update. Never had this issue before...... If you look at the screenshot it seems to be charging and awake while the battery is draining... The phone was sleeping at least 90% of the drain time..... An ideas ? Thanks

Attached Thumbnails

 


 

Who has the ZE551ML USA version that can extract the Baseband?

Who has the USA version of the ZE551ML rooted that can extract the baseband (radio) and send it to me so I can flash it in my ZF2 CN version. I will sacrifice my ZF2 and see if that way we can get different LTE bands from different region phones. See the method below, I will need the Radio Partition as a radio.img file.

[GUIDE] Making Dump Files Out of Android Device Partitions] http://forum.xda-developers.com/show....php?t=2450045

Please Help, thanks in advance.

I need RAW FW for Zenfone 2 ze551mL

:good::good::good::good::good:

:fingers-crossed::fingers-crossed::fingers-crossed::fingers-crossed:

Imei null asus zenfone 2 ZE551ML

buy a asus zenfone 2 Model ZE551ML 2GB. and I have a problem saying imei sim1 null and sim 2 works without problem I do have version SO 2.19.40.18_20150612
I need help for me.

Google Play Store for ASUS Zenfone 2 - ZE551ML

Hi, I've seen some posts on how to add Google Play Store on my chinese version of the Zenfone 2. However, can some one please walk step by step on how to do it? All I saw was "Transfer it to the phone and enable unknown sources...Install apk normally.." - but - I don't know where it needs to go and how to install it? The file I received was "com.forfun.ericxiang-1.apk" Thank you

ZenFone 2 (ZE551ML) - Won't continue past AT&T logo at boot ~ Please help!

This phone is nearly 2-3 weeks old, I had been transferring stuff over to a sd card cause I had filled up the internal space so quickly. I than realized that I had certain apps still downloading to my internal storage and it filled up to near capacity and the OS began to misbehave, ASUS launcher would not respond and crash, as well as various background applications as you would assume would crash due to low memory allowed. Before I had a chance to delete or transfer anything more ASUS launcher kept crashing repeatedly so I restarted it. At first it came back on with a blank screen but I could feel the pattern to unlock the encryption during the boot, so I hard restarted it, and it will show the first AT&T logo then allow me to decrypt with a pattern then it goes to another AT&T logo where it just sits, it doesn't freeze you can see the subtle animation of the logo, but it doesn't proceed any further. When I go into recovery I'm only allowed 3 options, restart, update via adb, update via microSD, there is no factory reset, or clean cache.? :( In fast boot mode I'm presented with the following information if it is of any use:

Product_Name - ATT_Phone
VARIANT - ASUS ZenF
HW_VERSION - 4
BOOTLOADER VERSION - 2.52
IFWI VERSION - 91.37-DEV
IMEI - 0123456789ABCDEF
SKU VERSION - ZE500CL_EU_US
SECURE_BOOT - ?

----

Any advice or help would be deeply appreciated, I'm going to try and reinstall the firmware or upgrade it, but is there any way to wipe the cache with fast boot? Or something else I'm not thinking of? Thank you.

[GUIDE] ReLock bootloader for ZE551ML

After some research on internet and xda i decided to try to relock my bootloader with the information provided by RealYoti, and this is how i did without causing a war conflict a Cthulhu evocation or a burning Zenfone
Anyway follow this guide at your own risk, turn on your brain and everything will be fine (hopefully)

• Download these files


• AFT: https://mega.nz/#!LcwhXDLZ!PN1jzQ0hD...QyvMzN8VK4fVBU


• RAW: https://mega.nz/#!7cA3nTZC!NiHOzVoVP...axpE2es7lrwGpI


• Install the Asus flash tool


• Reboot your zenfone to bootloader


• Open the asusflash tool


• Select your model in the drop-down menu (under the button settings)


• Choose if you want to keep the data or to wipe it all (i wiped)


• Click on the box and the select the raw file you just downloaded


• Connect your phone to the pc with the original usb cable


• Now you should see your phone in the device list, check if all is ok and then start the flash clicking the green button on the top


• Wait for 6-7 minutes and your phone should boot to android but now is recognized as ZE550ML, we have to fix this


• Reboot to bootloader


• Download from here (thanks to Shaka Huang) the last recovery set for the ze551ml (recovery.img droidboot.img boot.img)


• Flash it from cmd:


• 
  

  Code:

  
  

  ---

  fastboot flash fastboot droidboot.img

  ---

  
  


• 
  

  Code:

  
  

  ---

  fastboot flash recovery recovery.img

  ---

  
  


• 
  

  Code:

  
  

  ---

  fastboot flash boot boot.img

  ---

  
  


• Now we are ready to flash the ZE551ML firmware download the last one from the asus support site


• From the bootloader enter in the recovery


• Apply update from adb/sideload


• From the pc CMD type


• 
  

  Code:

  
  

  ---

  adb sideload thezipyoujustdownloaded.zip

  ---

  
  


• Wait


• Wipe data/cache factory restore


• Reboot


• Enjoy your warranty