RTC battery backup replacement?

[lentinj]

My eSATA sheevaplug looses the current time if unplugged for an extended period of time. Looking at this picture:-



The rev1.3, and thus eSATA sheevaplug (I'm guessing!), has a battery next to the power connector, which is probably responsible for keeping the RTC going. Is this correct? What sort of battery is it? Is it replacable or welded into place?

[NewIT_Tayler]

To replace the battery simply remove the four feet off the bottom of the plug, unscrew the four screws under the feet.  Lift main board out and slide battery out of holder, battery is a “ AG10”.

[Julius M. Farmer]

Nice to know about that. I hope that I won't be able to encounter replacing batteries. Thanks for posting.