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Asus ZenFone 2 (ZE551ML) is an Android smartphone manufactured by ASUS released March 2015.

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Why its charging very slow? It takes hour to get 8%

I have problem with charging it, it takes about an hour to increase battery level to 8%, I 've checked the battery still good as new, & it decrease normally.. Only problem is in charging, please advise what to do..

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Solución Elegida

This could be related to the charger. How old is the charger and does have you tried using a different power cable/ power box? After time the hardware gets worn out and can slow down and maybe not even work at all. Has the device ever gotten wet or has anything damaged the charging port?

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Dear I have changed my charger & cable, my previous charger & cable are still perfect when I charge other phones, the thing is Im having same problem with any charger & cable,

P. S. It's been only 10 months since I bought my Zenfone 2, despite of this problem.. it works perfectly.. But it takes half day daily to get full charged.

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Device never got wet, neither thing damaged charging port, I wish there's online troubleshoot program so I can get more clarification.

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Since it's only been 10 months see if it's under any kind of warranty before going further. This problem could also be caused by a faulty charging port, faulty motherboard or a faulty battery.

I found a guide on how to replace the battery but it requires some experience and time. You can buy batteries on multiple websites like amazon or maybe at a local cell phone shop.

Asus ZenFone 2 Battery Replacement

Good luck and let me know if you have any further questions.

~Justin

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Hi Justin, thanks for your comment, actually it still under guaranty & I went to Asus agent to check it.. He assured me that Battery doing great, mother board good too.. & nothing wrong with charging port neither charging base.. as any cable I plug; it fit as new & charges immediately but the same problem still resident. He just advised me to back up my data then format the device.. But its not reasonble. Anyway I'll keep searching for most effective related solution then take action as I use it alot & need it so much & don't want risk loosing some data by mistake now.. May be next weekend I might have time,

I really hope someone figure out what to do.

Thanks & have a nice day

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Hi Justin , I have the same problem after install the asus update for nougart . I am using Zen phone 4 max . I have monitor and done several trouble shoot and found out that it seems to be the Android OS problem . What you need to do is do a restart just before you need to charge the phone and the charging time will be ok . But if I dont restart the phone before charging , it will take 9-10 hrs to do a full charge , I have noticed that it will take an hour to charge 10% without restart. Will likely to do a factory reset an monitor again , becuase if restart will slove the charging problem , it seems to be a software problem to me . Hope the above helps ......

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Did you have solved your problem? I have the same issue!

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Hi friends,

I found this very helpful video addressing this issue. Have a look.. It worked for me:

https://youtu.be/t6lE8f93S1A

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Would be nice with a 5.5V charger. Then we could use longer cables.

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Hi, I own a Transformer Book T100TA and faced the same problem too.

I have been using 3rd party charger since my original cable damaged from a tight bend.

I have been searching the original charger for a while and finally decided to dissect the original usb connector since the original charger is so expensive. The I found the usb connector is so unique that you can’t simply replace it with an ordinary usb charging cables. Sort of similar to iphone charging cable. If you have a good soldering skills, you might be able to build one yourself as it’s considered as a technique called micro-soldering. You would required to slice open a micro usb connector and solder the smd resistor into place and seal up everything. Hope this helped.

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Make your own charging cable. Here’s a catch. Asus is such a bad-ass for making the charging connector unique to the T100 transformer book, so that generic USB cable won’t work on their devices. They force you to buy their expensive genuine charger even you just suffered from a broken connector. Here are the schematics and the cable I made. I made the USB type A on the charger so I can disconnect it and swap it with other USB cable to power other devices. Of course you can choose not to. Enjoy !

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Resistors look to be on pins 1 and 2 vs what the picture is showing…why?

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