need a new battery?

SupermotoMX · 10 Mar 2010 at 10:38

i built my new pc 2 days ago (pics coming sometime soon)

and it will not remember the date / time after it has been unplugged from the wall. do i need to leave it plugged in sometime for charge? or should i go buy a new one?

JonJ678 · 10 Mar 2010 at 11:14

The motherboard battery is a non-rechargable one. Not remembering the date/time normally means the battery has died after several years of use, replacing it is then an easy fix. 2032 or something like that. It's weird that it's happening with a new computer, may indicate a motherboard fault instead. New battery is cheaper than postage back for rma.

Good luck

Philtor · 10 Mar 2010 at 11:15

The date/time is stored in the CMOS which is powered with a CR2032 battery. Check yours is installed correctly and if it keeps happening then just replace it as they are only a couple of quid

Philtor · 10 Mar 2010 at 11:36

Forgot to mention - if you change the battery and it resolves the problem only for a short time before the issue returns then you have a dodgy board. I had an old Foxconn one do that many moons ago.

SupermotoMX · 10 Mar 2010 at 11:41

okay cheers for the help, will be getting a new battery!

mymorph · 10 Mar 2010 at 12:49

they usually last for many years. the one on my abit kt7 is about 7yrs old.

Corasik · 10 Mar 2010 at 13:43

The battery is only used when you unplug or switch the wall socket off (or during power cut). If the PC is simply left in standby (using about a watt of power), the PSU supplies enough standby power to maintain the clock/cmos settings.

So leaving the computer plugged in extends the battery life, but it doesnt recharge it

SupermotoMX · 10 Mar 2010 at 14:26

i have just realised that my motherboard even when switched off keeps 5v's going through the usb's ?

JonJ678 · 10 Mar 2010 at 23:33

Some do. It's useful for boot on usb and charging mobile phones. I think the voltage will vanish if you switch it off at the psu.