The cmos battery is out of service. Where can i buy a new one?

If showing a cmos problem, try pulling out the cmos battery (round circle battery) on the motherboard and wait 30 seconds, then place the battery back in. If you can't get to the bios still, then go out and buy a new cmos battery, or order from a site such as newegg.com

Locate your CMOS battery
Open the computer case and find the battery on the computer motherboard, verify that it will be accessible and that it can be removed. Most computers today use a coin cell CMOS battery as shown in the image to the right.
If you are unable to locate your CMOS battery you will need to refer to your motherboard or computer documentation and/or contact your computer manufacturer for additional assistance in locating it.
Obtain battery information
Unfortunately, most manufacturers will not list the exact type and model of your CMOS battery; therefore, once you have located the battery, write down all information about the battery (Voltage, chemistry, wiring, and packaging). If possible, remove the battery and take it to the location you plan on purchasing a new battery from.
Additional buying information can be found on our battery buying tips page.
Removing the battery
Caution: While in the computer make sure you're aware of Electro Static Discharge (ESD), your computer is off, and that you're properly grounding yourself. Especially before removing the battery.
If you're computer is using a coin cell battery similar to the above example picture. Removing the battery is relatively simple. Simply use your fingers to grab on the edge of the battery and pull it up and out of the container holding it. Some motherboards have a clip holding the battery down. If your computer has this clip you may need to use one had to move the clip up and the other hand to pull the battery out.
Unfortunately, not all CMOS batteries are removable; some manufactures will only allow a replacement battery to be added. If you're not using a coin cell battery and are not able to determine how to remove it refer to your motherboard or computer documentation and/or contact your computer manufacturer for additional assistance in removing the battery or how to insert a new replacement battery.
Users with computers that do not have removable batteries only options to install a new battery will most likely also need to set a jumper when adding the new battery into their computer.
Insert the new battery
Once you have purchased a new battery, remove the old battery (as instructed above) and replace it with the new battery.
Enter CMOS values
Once the battery is replaced turn on the computer and enter all values back into CMOS or set the values back to the default settings. Additional information about getting the values back to default can be found on document CH000970.
After the values have all been entered make sure to save the settings before exiting. Many CMOS setups allow you to press a key (such as F10) to save values and exit all in one action.
If after following all the above steps you continue to experience the same error when your computer starts and/or your computer is still unable to keep the stored values it's likely that you're experiencing a more serious issues. Most likely causes are bad power supply or bad motherboard.

Locate your CMOS battery
Open the computer case and find the battery on the computer motherboard,verify that it will be accessible and that it can be removed. Mostcomputers today use a coin cell CMOS battery as shown in the image tothe right.
If you are unable to locateyour CMOS battery you will need to refer to your motherboard orcomputer documentation and/or contact your computer manufacturer for additional assistance in locating it.
Obtain battery information
Unfortunately,most manufacturers will not list the exact type and model of your CMOSbattery; therefore, once you have located the battery, write down allinformation about the battery (Voltage, chemistry, wiring, andpackaging). If possible, remove the battery and take it to the locationyou plan on purchasing a new battery from.
Additional buying information can be found on our battery buying tips page.
Removing the battery
Caution: While in the computer make sure you're aware of Electro Static Discharge (ESD), your computer is off, and that you're properly grounding yourself. Especially before removing the battery.
Ifyou're computer is using a coin cell battery similar to the aboveexample picture. Removing the battery is relatively simple. Simply useyour fingers to grab on the edge of the battery and pull it up and outof the container holding it. Some motherboards have a clip holding thebattery down. If your computer has this clip you may need to use onehad to move the clip up and the other hand to pull the battery out.
Unfortunately,not all CMOS batteries are removable; some manufactures will only allowa replacement battery to be added. If you're not using a coin cellbattery and are not able to determine how to remove it refer to yourmotherboard or computer documentation and/or contact your computer manufacturer for additional assistance in removing the battery or how to insert a new replacement battery.
Userswith computers that do not have removable batteries only options toinstall a new battery will most likely also need to set a jumper when adding the new battery into their computer.
Insert the new battery
Once you have purchased a new battery, remove the old battery (as instructed above) and replace it with the new battery.
Enter CMOS values
Oncethe battery is replaced turn on the computer and enter all values backinto CMOS or set the values back to the default settings.

hi... u hav to replace the BIOS battery, go to a computer hardware shop and buy 1 and u can replace it by ur on


Locate your CMOS battery
Open the computer case and find the battery on the computer motherboard,verify that it will be accessible and that it can be removed. Mostcomputers today use a coin cell CMOS battery as shown in the image tothe right.
If you are unable to locateyour CMOS battery you will need to refer to your motherboard orcomputer documentation and/or contact your computer manufacturer for additional assistance in locating it.

Obtain battery information
Unfortunately,most manufacturers will not list the exact type and model of your CMOSbattery; therefore, once you have located the battery, write down allinformation about the battery (Voltage, chemistry, wiring, andpackaging). If possible, remove the battery and take it to the locationyou plan on purchasing a new battery from.
Additional buying information can be found on our battery buying tips page.
Removing the battery
Caution: While in the computer make sure you're aware of Electro Static Discharge (ESD), your computer is off, and that you're properly grounding yourself. Especially before removing the battery.
Ifyou're computer is using a coin cell battery similar to the aboveexample picture. Removing the battery is relatively simple. Simply useyour fingers to grab on the edge of the battery and pull it up and outof the container holding it. Some motherboards have a clip holding thebattery down. If your computer has this clip you may need to use onehad to move the clip up and the other hand to pull the battery out.
Unfortunately,not all CMOS batteries are removable; some manufactures will only allowa replacement battery to be added. If you're not using a coin cellbattery and are not able to determine how to remove it refer to yourmotherboard or computer documentation and/or contact your computer manufacturer for additional assistance in removing the battery or how to insert a new replacement battery.
Userswith computers that do not have removable batteries only options toinstall a new battery will most likely also need to set a jumper when adding the new battery into their computer.
Insert the new battery
Once you have purchased a new battery, remove the old battery (as instructed above) and replace it with the new battery.
Enter CMOS values
Oncethe battery is replaced turn on the computer and enter all values backinto CMOS or set the values back to the default settings. Additionalinformation about getting the values back to default can be found ondocument CH000970.
After the values have allbeen entered make sure to save the settings before exiting. Many CMOSsetups allow you to press a key (such as F10) to save values and exitall in one action.

go to http://tim.id.au/laptops he may have your service manual for download , you,ll have to dissasmble the laptop to replace the cmos battery , its a watch battery, the part# will be on the battery , go to any electronic,s store or r/x store to buy the battery , can be done with simple hand tools & take your time .

You need to open back cover of the laptop..there u can find a round battery on the motherboard...Replace it with a new one ..

You will have to open the case and look on the motherboard. There is a small battery looks like a watch battery. Just take it out and buy one with the exact amount of voltage. Snap the new one back in and voila done..
Don't forget to rate this solution.

If you buy a new cmos battery from Best Buy they will usually install it for a nominal charge if not for free. Hope this helps.

The key to opening the M5160T is to slide the power button cover strip: http://www.ari-service.com/blender/data/28147/3756_001.pdf

go to ebay to look for cd dvd rom replacement.

It is best to take computer to a computer shop to have cmos battery replaced because the computer has to be disassemled to access motherboard.

If the main battery has never been replace most likely its bad most laptop batteries have short lives.

on the otherhand with expense in mind you may want to price a new laptop from walmart they start arond 499.00 brand new