This is not really an answer in fact I have the same problem but mine is a little more in depth I have a toshiba c55_5201. and it seems to not have a battery either. Theres a spot for it but there sure isnt a battery there. My other problem is that my adapter is hooked up to the main battery but it says " adapter plugged in but not charging", Now I was reading that the main battery has to fully charged to enable it to start charing an RTC battery, but no battery????? Check to make sure your battery and adapter is working correctly, me I am about to throw this one out the window.