I have an Inspiron 5520.  When you power up it continuously beeps 5 times; from what i have discerned this suggests:  

Also from what i understand, i have to dismantle the entire laptop to get to the battery.  My question is why should this prevent me from starting the computer?  It is my understanding that the CMOS memory (supported by this batter) contains, BIOS type information, so if it isn't stored in memory then shouldn't the computer start with default settings? 

In that case I don't understand why the computer just sits dead with the constant beeping.  I would appreciate any insights.

Thanks