How do you replace CMOS battery in Toshiba P775-S7215?

Replace the mother board.

Hi sibosf
You can download a user manual for free at this site, but you have to answer a few quick questions about the laptop.
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http://safemanuals.com/314159.php?k=56a1173718da0926fc965b055fca6cc4&ID=3883393&q=TOSHIBA SATELLITE P775

Well, you need a PDF viwer like Adobe Acrobat reader, if you you already have it then please visit the following link to download your laptop's user guide.
Links :
Shortened : http://bit.ly/qifPrj
Actual Link : http://cdgenp01.csd.toshiba.com/content/support/manuals/userguides/su3025174/GMAD00274010_Sat-SatProP700_11Mar31.pdf

call the toshiba tech support at 1-800-457-7777 for battery replacement...

http://www.tomshardware.com/forum/247842-30-replace-cmos-battery-toshiba-satellite

Most CMOS batteries are button lithium batteries with a voltage of 3.0 volts. Anything less than 2.9 volts should be replaced.

Hi AshishB, Yes, Toshiba does refer to the CMOS battery in their literature as the real time clock battery. Your retailer is half right, the battery is on the motherboard but its attached via a connector and it can be replaced. Here are links to a couple of venders that sell the RTC battery for your laptop: - Http://www.sparepartswarehouse.com/Toshiba,Satellite,L15-S104,Laptop,Batteries-Backup-RTC.aspx - http://cgi.ebay.com/Toshiba-Laptop-motherboard-battery-cmos-L15-S104_W0QQitemZ170060189842QQihZ007QQcategoryZ3666QQrdZ1QQssPageNameZWD1VQQcmdZViewItem Let us know if you have any other questions and please don?t forget to rate the posting.