Satellite C660-1d7 - Wireless disconnects when not on mains

I have been having increasing problems with the wireless on my C660-1d7 . Every time I take it off the mains, the wireless drops, and i have to plug it into Ethernet, which kind of takes the whole point away from being mobile.
I've updated the drivers on the system to the most recent (taken from toshiba website) yet it still drops. Its becoming annoying as i work from home, so have VPN loaded, so every time i lose the net, I have to keep logging back into that, which takes time away. i also use a VOIP phone which again will cut off.
Wireless LAN is Realtek RTL8118CE
Can anyone help as its driving me potty.

dear sir
i have the same problem .when the charger is unbluged the wireless is down and no more net on the laptop .i tried recovery for the windows ,i tried to use helpful answers from the forum and google ,the only way is when i put the power plan on high performance which reduces the battry life ,or i must put on the charge all the time ..i didnt have this problem before ,i used the laptop almost 5 months but from 2 weeks this problem appeared .i have another laptop and it works properly no internet cuts ..i really need your help ..waiting for your answer ,thanks

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>Microsoft advises this is a manufacturer issue, as my OS is OEM.
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hello
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START QUOTE of Toshiba Support response:
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Serial No: 31474181G
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Thanx guys,
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Satellite C660-1d7 - Wireless disconnects when not on mains

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