Question about Acer Extensa 500T Notebook

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Acer Extensa 503T

Hello, my olc Acer needs a new CMOS Battery. But i cant find a description how to do this. I know the battery type is CR 1220 but i dont know how to open the maschine to change.
Is anybody here to help me ?
Just now thanks a lot for your help

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  • Anonymous Mar 23, 2008


    I have the same problem. Did you manage to change the battery?



  • skaanild Mar 23, 2008


    I have the same problem. Did you manage to change the battery?





5 Answers

The RTC battery type is CR 1220.

Posted on May 01, 2008

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Go to this link to show how to roll back the keyboard.
Once you have done this then to your left you have the heatsink it has 4 screws in, undo the screws and you will see the Cmos battery just pop it out and fitt new on . Make sure u earth yourself before going into the machine HOPE THIS HELPS

Posted on Apr 23, 2008

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Oops. The above link to the Extensa 50x-510 Service Guide was incomplete. Here's the real link:
Note: you have to remove the CPU heat sink to get at the battery. Not sure you can just put it straight back on after replacing the battery or if you have to use a new heat sink pad? Looking into it.

Posted on Jan 30, 2008

If you want to do it yourself check out the following links:
Search for "Removing the RTC battery" in the following document:

The pictures on how to fold the keyboard back are easier to see in the following link :

Good luck
Shane =o)

Posted on Jan 30, 2008

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Let a computer repair shop do this because the computer has to be diassemled to acess the motherboard removing laptop covers is a delicate operation.

Posted on Jan 15, 2008

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Posted on Jan 02, 2017

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Www ehow com

Cmos battery is usually a 3 V button battery, there are variety of different brands so you need to open and check it.
eBay: ACER ASPIRE 7741G 334G50 MS2309 CMOS BATTERY - 476
2035, 2032 can be bought from any super market or hardware store. Need to open the PC, locate the battery, which is normally clipped to the mother board. Use a small screw driver and lift out. If battery is soldered to the mother board then need to access under the board and de-solder carefully without damaging the tracks.

2032: CR2032 CR 2032 5004LC 3V 3 Volt button cell lithium battery for CMOS
solder types: SONY CR2032 3V SOLDER TAB Pin battery with soldering tag for CMOS Bios PLC new

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First you need to remove the keyboard to gain access to the CMOS battery (Acer call them a RTC battery)
Tell you what give me a email address and I'll send you the service manual.


Jan 08, 2008 | Acer Extensa 503T Notebook

1 Answer

How to change battery on acer extensa

you need to open the side panel to remove the battery cmos its size of a dime and has a mark cr-2032 then unlock it the battery should pop out easily

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Each time I start my eeepc 1005HA, time/date has gone. This sounds like a CMOS battery dead. I expect you give me what I must buy and how I can replace the battery. Thanks a lot.

you should change your cmos battery. the model is ML 1220. don't buy the CR 1220 because it is not rechargeable. I hope this helps. I also have the same problem with my asus eee pc 1005HA.

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Yes, you do have to take it apart. How do you know the cmos battery is bad? Is the time wrong all of the time??Does the BIOS default all the time??

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