Acer 390C Laptop: "CMOS battery bad" error - How do I replace it?

My son was just given an Acer Extensa 390C laptop that was in storage for awhile and displays a %26quot;CMOS battery bad%26quot; error when booting and the computer does not keep time. I downloaded the service manual but it gives no instruction about how to replace the CMOS battery. It%26#039;s not a clip-type and I need to know how to change the battery.|||It probably needs to be replaced. It really isn%26#039;t hard to do, and you should be able to get a new battery at Allbatteryworld.com for a good price.|||There%26#039;s a couple of dopie answers for ya%26#039;. They shouldn%26#039;t have even replied.

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|||u have to take the laptop apart, find it and replace.