0
votes
1answer
74 views

What are the negative effects of a flat CMOS battery?

Recently I have noticed that my computer has been starting up with the time and date incorrect. Given that my motherboard is about 7 years old I'm guessing that the CMOS battery is flat (or close to ...
0
votes
0answers
78 views

CMOS battery lifespan

How long does it take for a CMOS battery to STOP working since the first instance of a failure. For example, if a CMOS battery fails on Jan 1, but then works without problem until May 1 (four months ...
1
vote
4answers
242 views

CMOS Battery recharged [duplicate]

My pc was unused for several months(its a 5 year old acer desktop) and on boot up a screen came up indicating that the CMOS battery was low. Any time I restarted, as expected, the same screen came up ...
0
votes
3answers
559 views

In linux, how to find whether CMOS battery is working or not?

I want to programatically determine whether CMOS battery is working or not. In my C++ program on linux I want to connect to internet and update system time if CMOS battery is not present or not ...
2
votes
1answer
99 views

CMOS Battery. Forgot to put it in

Well. I am a complete idiot. I had to replace my keyboard. And the only way to do that was to completely take it apart. While I was at it I was going to replace my CMOS battery. I took it out. Went to ...
1
vote
1answer
104 views

Changing CMOS battery Compaq 1234

How do I locate and change the CMOS battery in HP Compaq Presario 1234?
2
votes
4answers
7k views

How long does CMOS battery (3V) on a motherboard last?

Just wondering usually how long does CMOS battery last on a regular motherboard? I read that motherboard leakage current of about 3 - 6 micro ampere. I did a calculation below but I believe that i ...
0
votes
0answers
298 views

I have to clear CMOS to Boot

The problem I have is that I need to remove the CMOS battery so the computer would turn on. It appears to be dead, I press the power button and it does absolutely nothing, no lights on, no beeping, ...
32
votes
8answers
5k views

How can a CMOS battery store data?

How does a CMOS battery store information on it? I know it stores information such as the time, date, passwords and drive configuration, but how? How can a battery store data?
5
votes
2answers
8k views

is a CMOS battery rechargable?

if so, how does it's recharger look like?
2
votes
4answers
301 views

Home server clock runs too fast

I have a Debian server running on some hardware from ca 2004, and the real time clock is running too fast. I have set it to run ntpdate every hour, so the clock is mostly correct, but this seems kinda ...