Acer Liquid mt - Strange charging behaviour...

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Since there's no Acer Liquid mt section for now, I'll post it here

First of all, I got an Acer Liquid mt since 5 days.
The first 3 days everything went fine, since 2 days... there's a "Ghost in the Machine"

Issue 1:
The Liquid mt is swtiched on.
Battery went down to 15% - I plugged in the charger.
After 1,5 hours, the phone shows 100% (under Settings and a separate Taskbar icon, "Batteryminder").

So I took the charger off - and after 1 hour of standby the battery went down to 95%.
After 2-3 minutes of typing - 90%.
So WTF...?!

Issue 2:
So I charged again and after 15 minutes or so the phone shows 100% - again
Then I turned off the phone and charged it in off-mode.
The phone was then fully charged after another 45 minutes!

With this procedure I have normal battery life... that means 5% in around 8 hours (in standby).
Strange thing is, that the phone shows "fully charged" - when it's approximately charged 60% or so...

Does anyone have an idea?!
Thanks!

Don't worry mate this is how Lithium-ion battery's behave and I have an Acer Liquid MT it does this stuff but its not anything to worry about just don't use any battery saving programs their all crap.