If I use my external hdd's usb 3.0 cable as my charging cable to be plugged into the note 3 charger to charge my note 3 will it damage or any disadvantages to my phone like battery damage.

How do i know whether it can consistently provide 1800?

Hi guy, any clue for the issue that I'm facing now on my Note 3. When I charge my phone until the Green notification light appears and screen show the message saying it's Charged at 100%, but when I switch off the charger the 100% instantly change to 98% and if I plug in the charger again, within seconds it will show the Charged message and Green notification light appears again and if I switch off the charger now then it will only remain at 100%. What's the problem causing this?

But I suspect the chances of hardware issue is higher, because I have been seeing my friend using some sort of non original cable to charge their phone and eventually can't get to full charged at 100%. I don't really suspect it's the software that drain the battery so fast within seconds as I mentioned that if I re-plug again the charger and within seconds it will jump back to 100% and stay still in 100% even I plug out my charger. So I'm suspecting it's the charger or the usb cable problem as I just exchanged a brand new charger from samsung due to my previous one was faulty. But I have tried to use another USB 3.0 cable to do charging but still the same issue, but haven't tried with other charger yet, but maybe I will do a factory reset to see if this issue fix.

Anyway thanks for your clue.