when charging, the battery status from 95% suddenly jumps to 100%

[Da_Beats]

Hi Guys!

I just bought my Xperia Z1 last month, i haven't full charge to 100% my battery since the the first 8H charging the time i bought. I always charge when the status 20% and below, but never flat. Now I noticed that the battery status from 95% suddenly jump on to 100% within a matter of seconds. 

 Please help.... don't know the cause, is my battery already damaged or spoiled?

Thanks.

[Mystic · Accepted solution]

Well with any battery you need to cycle it completely once ina  while. Charging it from 20% back to 100% is actually detrimental if you do it on a regular basis.

Sometimes let your phone dicharge completely then charge it completely to 100%.

The issue you are facing however could also be due to the battery capacity being detected wrongly. 

Try going to *#*#7378423#*#*  on your dialer and go to diagnostics and check battery health.. if it reads over 300000 then you are fine... Its not your battery. 

[Da_Beats]

Hi Mystic!

Thank you very much for your reply. i'll do it. other more question, sorry kinda newbie..

I usually charge when it's 30% or 40% is it ok? also, when i charging my phone turned-off, the led indicator turns green, but the icon looks still charging, the icon image, battery with the lighting image inside. will my screen tell that my phone fully charged? or the lightning image will gone once my battery is 100%, like the other phone does?

Please help.. sorry for this lame questions..