On Monday, September 10, 2012 at 7:22:22 PM UTC-7, fred.fl...@thecave.com
> >>> My computer clock battery died. It had a CR2032. I bought a CR2025 at
> >>> a store going out of business (No Returns). Both say they are 3v. The
> >>> CR2025 is a little thinner, but otherwise they are the same size. Is
> >>> there any reason not to use the 2025?
> >>> --------------
> >> They are the same except that the 25 is lower amp rating. The
> >> 25 at the end is 2.5mm verses the 3.2 mm you were using.. It'll
> >> work just fine but not last as long. Probably it'll last long enough
> >> for the rest of that computer's life.
> >> the 20 at the start is the width of the cell.
> >> I am doing this from memory but it should be correct.
> >> Jamie.
> >Yep that's correct.
> >For a 2032, the 20 means the diameter (20mm) and the 32 means the thickness
> >(3.2mm). The 2025 is 2.5mm thick and the even thinner 2016 is 1.6mm thick.
> >Most sockets are designed for a particular thickness so as others have
> >noted, the 2025 will not fit the socket correctly.
> It's contacting fine, and is working to keep my clock set. Teh contacts
> are on the side of the case part of the battery, so it seems to work
> just fine. This is an older IBM computer, and it needs a new battery
> every 8 months or so. It always has since I bought it around 2004.
> Seems that IBM computers all had (or still have) this problem. I'll
> live with it. At least they dont seem to have failing capacitors and
> the other failures that some other brands are known to have. Aside from
> eating batteries, these IBM systems seem to run forever.
> I should mention that I always shut off a power strip for the computer
> and all components hooked to it. I was told that leaving it plugged in
> and just shutting off the power switch would save batteries. But I'd
> probably pay for it in my electric bill, and possibly lose a computer
> from lightning. Lightning strikes are common on farms. I tend to lose
> a modem at least once a year and recently lost a DTV converter. I'd
> have to disconnect the antennas and phone lines and darn near everything
> else to prevent this. That gets to be a major hassle.
It should be noted that turning on and off the computer is more damaging than leaving it on! The worst thing for electronic equipment is heating then cooling.
If left on, the temperature remains relatively constant. The expansion and contraction on the circuit boards, soldering joints and silicon chips all have this problem. Just like a light bulb, it is better to leave it on.