Inspiron 1545 battery problems

I've had my Inspiron for a couple of years now, and just recently it has developed a problem where if it accidentally is moved the wrong way it will shut down the entire system.  It also happens if I grab onto it to move it it will do the same.  I have no idea why this keeps happening, can anyone help??

http://support.dell.com/support/edocs/systems/ins1545/en/SM/basecvr.htm#wp1224689

Sound like something like the memory may have become loose...wouldn't hurt to open and have a look around...