I changed cmos battery 2 time but problem is same date & time is not saving so iwant solution regarding this problem

check if your clock battery on motherboard is working properly

Change the CMOS battery.

If you had taken the time to post the computer manufacturer name, and model number; I would know what motherboard we're dealing with, and what type of CMOS battery it uses.

Generally the battery is a CR2032.
A type of watch battery.
Positive ( + ) side ALWAYS goes UP

Post back in a Comment.
Regards,
joecoolvette

If your cmos battery is new and the date and time not change. Try the following.
1. Clean the cmos battery terminals.
2. Check your mother board if there is bulges capacitor.
3. Check the memory you have using if in the same voltage requirements.
Hope this will help to you.

Welcome to FixYa!

-try doing these steps.
1) Enter the CMOS setup
-to enter the CMOS or BIOS setup, shutdown the computer completely -then once you press the power button to turn it on, keep on tapping on F2. (for some computer its F1, del, F10)
2)In the main or system setup screen you should be able to see the date and time. Using your arrow keys, navigate to the date and change the date. Once highlighted on the month, day, or year, press your arrow keys or your page up / page down keys to change the date.
These steps may vary for your BIOS; additional help, information, and simulations can be found on the BIOS help page.
3)after you have configured the time and date, save your settings and exit.
4)if it still would'nt hold the time you have setup, it could be a possible virus issue, or the CMOS battery on your computer could be degraded.
Hope this steps would help!
Have a great day!

It is because of CMOS battery is weak
Change it and it will be fine

The most possible cause for that is the cmos battery at the mainboard. Open the case and try to locate a round small battery like this

Remove it and using this as a sample buy a new one (it's about 2-5Euros cost). Repalce with the new one and you are ready. After changing the battery a good advice is to get into the bios settings and check them, because sometimes are resetting at default after changing the battery.

In case of a problem or clarification, don't hesitate to post me a reply.
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Thanks and regards
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Stelios
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You just set up the time in BIOS setting. To get the BIOS just press delete during your laptop is on. Go to CMOS to change the time. Use arrow key to select after that you need to save just press F10 to save settings.

As if you have tried changing the date & time in your control panel plus BIOS.There is nothing left to be done regarding changing date & time.
But If your CMOS battery in the motherboard fails,it will always goes back to it deafult date & time.Replace the battery and it will solve your problem.

I recommend to use Sony Lithium Battery

I don't know what kind of unit you are useing.
You need to watch the screen when it boots up.
It will say check sum error, press ? F-2 to continue or F-1 to enter setup.??
Enter the setup screen and change the date and time.
Save ? F-10 and exit.
I hope this has helped you.

The BIOS battery maybe under one of the panels on the bottom of the laptop or under the keyboard.
To reset the BIOS ack to the default settings, go into the BIOS configuration and look at the various configurations, usually there is a setting to load the Default settings, then save and exit, and this would not change the Date & Time setting.
The other way to set the BIOS default setting is to remove the BIOS battery (it is probably a lithium 3volt button battery), wait 1/2 hour and replace the battery, the go into the BIOS configuration and set the Date & Time setting etc.