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#11
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How do I replace the BIOS battery?
Hi!
I have Packard-bell 450M+/4x4 computer and after 13 years of service, the BIOS battery has died, causing all sorts of start-up problems. How would I go about replacing the battery? The onboard battery is likely to be a NiCad rechargeable. The computer will charge it when powered on. Therefore you could try leaving the computer on for a few days to see if the battery will come up, especially if has been sitting. Eventually, it wears out. I've got an Axcel 386SX-16 still running on its original soldered NiCad, and it looks good--no sign of leakage or age. So the lifetimes vary somewhat... What you need may be a little hard to come by. The onboard battery is likely a 3.6V unit, probably with a colored plastic wrapping around its body. You may wish to try and remove it, as it can leak and then you will have all kinds of problems. Anyway, the replacement battery you need is typically a black rectangular package with a wire lead coming out of it. A four position plastic plug will be attached to this, but only two positions at each end will have a wire in them. One wire is - and the other +. I'm sure that someone is still selling them, somewhere. Used to be that all the regular suspects (battery makers) had one. I've seen them from Ray-O-Vac, Duracell and Energizer. Tadiran also marketed one. If you can get one, it's a plug and go affair, as long as the connector gets plugged in the right way. William |
#12
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How do I replace the BIOS battery? - Acknowledgement
Hi!
Its a bit a revelation to know that I can use AA batteries as I was I had a set a idea that only watch batteries can be used to power the BIOS. Can they indeed be safely used and how long to AA Alkaline batteries last? Can I substitute other concoctions of batteries like lithium or titanium AA batteries? Just get some good quality AA batteries if you want to do this. No sense in getting all spendy on them. Locate them where any leak won't hurt anything. Since you're only going to have 3 volts coming into the circuit from these, the clock may run somewhat slowly. However, it may not be too bad, as these things usually keep time going up to the bitter end of the battery's life. For some more "advanced" tinkering, see these: http://www.walshcomptech.com/ps2/dallasrework.html http://greyghost.mooo.com/ds1387rework/ Your computer probably doesn't use one of those. Later PB systems did. William |
#13
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A little late to the party Bill
Hello William !
"William R. Walsh" m wrote in message Just get some good quality AA batteries if you want to do this. No sense in getting all spendy on them. Locate them where any leak won't hurt anything. Since you're only going to have 3 volts coming into the circuit from these, the clock may run somewhat slowly. However, it may not be too bad, as these things usually keep time going up to the bitter end of the battery's life. Why? Why would the clock run slow ? You know Bill, I tend to do a little research before I answer questions, 'cause I really dislike being wrong. Some Packard Bell's use a Pansonic BR1225 3V bat on the motherboard. http://parts.digikey.com/1/parts/123...m-br-1225.html If you were actually here, I would point to various Packard Bell motherboards with this battery on the motherboard. Some used a bat holder with 2 1.5V AA bats, which my math equals 3V. Have some of those too. I looked around the internet, and most if not all references were to a 3V bat on his and other "older" motherboards. Before I responded to the question. Taking into consideration the "skill level" of the OP, I carefully considered my answer, and figured my response would be the easiest course of action. I could have come up with lots of other ideas, some of them involving Plutonium U-238 or U-239, and even some Anti-matter suggestions. But I decided that KISS would get the job done. For some more "advanced" tinkering, see these: If I have to come all the way down to Texas to straighten you out again, I'm bringing DooM, my cat, and you're not gonna like it ! bobwatts -- bobwatts Watts Carburetion Service WhizzBang Computers " collector of Asian transfat plastic trinkets ! " EartH // KlaXXoN |
#14
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A little late to the party Bill
Hi!
Hello William ! Better late than never. Why? Why would the clock run slow ? You know Bill, I tend to do a little research before I answer questions, 'cause I really dislike being wrong. I don't know that I'm right. :-) But I know what I've seen on similar vintage PB systems, in the "3x3" case...and that's a rechargeable, 3.6 or so volt NiCad package battery. If I still had that 486 board, I'd shoot a picture of it. I'm not sure I can get at the Accel machine right now, which has a Yuasa brand NiCad onboard. Run a 3.6V clock on 3V and it might run a little slow. Or maybe not, if the design can tolerate the battery voltage dropping. That's what I was coming from, in light of what I knew. I tend to favor things that I've seen firsthand as valid experience, as long as I understood what was there. I've seen two other methods, what I'd call later and latest. The "later" method is a Dallas clock module, and the latest is a CR2032 battery. My mother's Legend desktop has a Dallas clock module. I am pretty sure that I've got a P150 tower with a CR2032 battery in it. If I have to come all the way down to Texas to straighten you out again, I'm bringing DooM, my cat, and you're not gonna like it ! You have a cat named DooM? I may not like meeting this cat, but I sure DO like its name! William |
#15
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A little late to the party Bill
William R. Walsh wrote:
Hi! Hello William ! Better late than never. Why? Why would the clock run slow ? You know Bill, I tend to do a little research before I answer questions, 'cause I really dislike being wrong. I don't know that I'm right. :-) But I know what I've seen on similar vintage PB systems, in the "3x3" case...and that's a rechargeable, 3.6 or so volt NiCad package battery. If I still had that 486 board, I'd shoot a picture of it. I'm not sure I can get at the Accel machine right now, which has a Yuasa brand NiCad onboard. Run a 3.6V clock on 3V and it might run a little slow. Or maybe not, if the design can tolerate the battery voltage dropping. That's what I was coming from, in light of what I knew. I tend to favor things that I've seen firsthand as valid experience, as long as I understood what was there. I've seen two other methods, what I'd call later and latest. The "later" method is a Dallas clock module, and the latest is a CR2032 battery. My mother's Legend desktop has a Dallas clock module. I am pretty sure that I've got a P150 tower with a CR2032 battery in it. If I have to come all the way down to Texas to straighten you out again, I'm bringing DooM, my cat, and you're not gonna like it ! You have a cat named DooM? I may not like meeting this cat, but I sure DO like its name! William By the time PB started shipping Pentium systems, it also began using a lot of Intel branded boards, all with CR2032. It took a long time for the personal computer industry to standardize on CMOS batteries... Ben Myers |
#16
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A little late to the party Bill
Hi William !
"William R. Walsh" m wrote in message You have a cat named DooM? I may not like meeting this cat, but I sure DO like its name! William Of COURSE you would like meeting DooM ! He's neato. So is his brother Hammer. Maverick is still skittish as hell ( for reasons unknown ), and Josie you might have some trouble with. I have seen her hurt some people pretty bad. O.C. ( outside Cat ) is ambivalent. All strays, all in perfect condition. DooM of course was named after the Greatest P.C. Game in History. Hammer was named in honor of Mike Hammer. D2 ( daughter two ) named Josie and Maverick. O. C. is obvious. :-) Stop in around feeding time, always a hoot ! bob |
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