I have just had reason to open up two ageing laptops to retrieve their CMOS batteries. Here is a quick rundown of what I had to do to get to them. HP Compaq Evo N115 What I had to remove: Battery Hard disk CD-ROM drive LED cover Keyboard Screen Heat dissipator Total screws: 19 T-8 head screws of varying sizes, including 4 sprung screws that have to be removed and replaced in a specific order to prevent the heat sink breaking. Time to disassemble: 20 mins Time to reassemble: 10 mins IBM Thinkpad R30 What I had to remove: Keyboard Total of 2 Philips head screws. Time to disassemble: 1 minute Time to reassemble: 1 minute Conclusion I think the conclusion is fairly obvious. The R30 is a "consumer" level laptop, so doesn't have the shear awesome build of the T or X series Thinkpads, and yet even for something as simple as this it runs rings around the other "big brand" laptop I have the misfortune of owning. Thinkpad. Beca...