How to replace the eeePC 1005HA CMOS backup battery

All small white things are good

The eeePC 1005 is still a nice little netbook. Despite owning an iPad and them apparently being all the craze, I still prefer being productive on my eeePC.

However if you’ve got one, its likely getting a bit long in the tooth by now.

Getting BIOS setting errors on each boot up of your eeePC? If it’s asking you to reload setup defaults by pressing F2 every time you turn it on, it’s probably time to replace the CMOS backup battery.

With a hefty disclaimer of me not being responsible for anything you do or don’t do… here’s how:

First buy a replacement battery. It is an ML 1220 3V rechargeable button battery. eBay or Amazon will be your best bets. If you can get one with metal contacts pre-soldered to the battery, it will make your life easier. Don’t get a CR1220 — those are non-rechargeable.

When ready, it’s time to open up the eeePC.

1. Unplug the eeePC and remove the main battery.

2. Turn the netbook upside down and remove the four Philips screws, one in each corner. Unscrew the memory flap on the bottom to find a fifth screw inside. Unscrew that too.

Unscrew the five screws

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