Bridge Battery Found in the T4220?

During disassembly of my T4220, I came across a set of perhaps coin batteries inside a yellow plastic-molded casing tucked into a small portion above the battery compartment.

I haven’t tried swapping the main battery during normal operation (don’t want to take that risk) or when it is standby/sleep mode. If you are a T4200 series owner, do you have any experiences with this? I’ll come back with my findings in a later post.

Disassembly of the Fujitsu LifeBook T4200 Series Tablet PC

This guide is a mirror (mostly) of the one posted over at the Tablet PC forums.

This disassembly guide is a primer on how to disassemble the Fujitsu LifeBook T4200 Series Tablet PC to get to the Socket P socketed processor so one can upgrade from a “Merom” 65nm processor to a “Penryn” 45nm processor, reapply thermal grease, clean out the heatsink and fan, and so forth. This guide will not go in to specific details on how to a.) replace the processor and ensure stable operation; b.) remove and reapply the thermal grease; or c.) clean the heatsink — it is simply a basis to get access to the processor, what you do from there is up to you. This guide is applicable to the Fujitsu LifeBook T4210, T4215, and the T4220 as these models all use the same chassis, but may be also applicable to previous and possibly future generations of the Fujitsu LifeBook T4000 series line. And, now for some friendly reminders:

Notices and Warnings

Notice: This will void your manufacturer warranty, make sure you are willing to accept that any mishaps during disassembly of your system will void it.

Warning: This guide is also not for the faint of heart, in any disassembly there is a risk that you may damage system components. It is your responsibility and ultimately your choice to proceed with the following guide and its steps. I must admit that I had a couple of close calls of possibly damaging something, it’s a risk that one must take, even when documenting a disassembly guide.

Warning: Electrostatic discharge (ESD) kills sensitive components like the one found in your Tablet PC or any other system. Remember to ground yourself before touching any component or wear an antistatic wrist wrap at all times when dealing with computer components.

Warning: You can not undo any of your actions when disassembling if any system component is damaged. Like the first warning, make sure you are willing to risk disassembling your system because opening up your system will void your warranty. If only life was as easy as doing a Ctrl-Z. 🙂

Right, now that we’ve gotten through that, let the disassembly begin! Read more of this post