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Big battery drain on A13 Tablet (ICS)

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http://forum.xda-developers.com – So i picked up one of those cheap a13 tablets,and was suprised on how good it is,but there is one weak point...the battery. after countless recalibrations of the battery,i can use the tablet only for 30-45 mins (lowest brightness,no wifi,downclocked,etc). i checked with cpu spy,the tablet goes to deep sleep normally,but on the battery inf screen (in settings) i found a quite interessting thing, in adition to the wifi,screen on,awake bars (on the bottom),there was also a line called mobile network signal,which differs in color from the other 2,and is a straight line (the other three stop&quot (HowTos)