NiMH batteries Re: Mac Portable HD dilemma
From: [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Looking at my conditioning charger for both AA/AAA NiMH and NiCd cells, the instruction sheet suggests reconditioning(completely discharging) NiCd cells each time they are inserted, while with NiMH cells it says recondition/discharge completely every several times. So I am assuming memory effect for NiMH's isn't a big problem, but must still be considered. On the other hand, http://www.batteryuniversity.com/partone-12.htm seems to indicate the opposite. So, Jeff, will you be able to find the right sized NiMH battery to replace the lead acid one in the Outbound Laptop? Wonder if I could find the correct size for my Outbound Notebook? I don't know if I'd find a perfect fit, and I doubt that I could find one with that particular connector, but I bet I could rig something or find something that would fit in the compartment, provide 12V and have a higher Amp-Hour rating. On the other hand, the lead acid batteries are something like $25 and I bet the NiMH would be considerably more. So I'm not likely to pursue this in the near future. Good to hear from you Saul. Us Outbound owners seem to be thin on the ground. Jeff Walther -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
NiMH batteries Re: Mac Portable HD dilemma
In a message dated 12/21/05 15:41:09, vintage.macs@mail.maclaunch.com writes: --- Jeff Walther [EMAIL PROTECTED] wrote: Do NiMH batteries have the same memory phenomenon if not fully discharged as NiCd batteries do? I might like to look at a NiMH replacement for my Outbound Laptop battery, Nope, no problems with NiMH. Might want to fix it up with a snart charger that'll switch from full charge to just a trickle when it senses the cells are fully charged. The so-called memory effect isn't a big problem. Looking at my conditioning charger for both AA/AAA NiMH and NiCd cells, the instruction sheet suggests reconditioning(completely discharging) NiCd cells each time they are inserted, while with NiMH cells it says recondition/discharge completely every several times. So I am assuming memory effect for NiMH's isn't a big problem, but must still be considered. On the other hand, http://www.batteryuniversity.com/partone-12.htm seems to indicate the opposite. So, Jeff, will you be able to find the right sized NiMH battery to replace the lead acid one in the Outbound Laptop? Wonder if I could find the correct size for my Outbound Notebook? Cheers, Saul Broudy Philadelphia, PA -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
Re: Mac Portable HD dilemma
i ment just to get the portable to boot remove the battery and it wont boot on its own off just the wall-wart bad design it needs both the battery (or a simulation thereof in this case the cheap second wallwart) to get started On 20/12/05, Gregg Eshelman [EMAIL PROTECTED] wrote: --- Samual Acorn [EMAIL PROTECTED] wrote: this may sound odd but i read somewhere that you can use a cheap wall-brick with the same output voltage as the battery a put it in place of the battery and plug the regular PSU in and it should power up (the wall brick will simulate the battery in order to trick the portable to boot great design eh?) The Portable always runs off the sealed lead-acid battery. Let it get too low and *pfft!* it's kaput. A modern replacement shouldn't be so sensitive. When plugged in, the charger circuit keeps topping up the battery as the Mac drains it. Apple chose lead-acid because of the longer run time it could have VS the Nickle-Cadmium technology of the time. The drawback was higher weight and the sensitivity to too much discharge. An interesting thing is that in most applications, NiMH cells can directly replace NiCd cells. They're the same voltage but NiMH has a higher energy density so it'll run things longer. A NiCd charger will work just fine on NiMH cells, it just takes longer than a higher rate charger designed for NiMH cells. Some smart chargers for NiCd may have problems where they'll shut down before NiMH cells are fully charged. Replacing lead-acid batteries with a bank of NiCd or NiMH cells is a bit of a problem since LA is 2 volts per cell and the others are only 1.2 volts. If the LA being replaced has a total voltage evenly divisible by 1.2, then use that many NiCd or NiMH cells to replace the LA. Be sure the amp-hour or miliamp-hour rating matches or exceeds the original LA battery! It will be total Fandemonium! August (Fri) 4th, (Sat) 5th (Sun) 6th, 2006 http://www.fandemonium.org __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com -- --sam http://mephitus.renamon.org/ When you've done something right, no one will be sure you've done anything at all. -- Futurama -- -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
Re: Mac Portable HD dilemma
Date: Mon, 19 Dec 2005 23:37:06 -0800 (PST) From: Gregg Eshelman [EMAIL PROTECTED] An interesting thing is that in most applications, NiMH cells can directly replace NiCd cells. They're the same voltage but NiMH has a higher energy density so it'll run things longer. A NiCd charger will work just fine on NiMH cells, it just takes longer than a higher rate charger designed for NiMH cells. Some smart chargers for NiCd may have problems where they'll shut down before NiMH cells are fully charged. snippage of useful stuff Do NiMH batteries have the same memory phenomenon if not fully discharged as NiCd batteries do? I might like to look at a NiMH replacement for my Outbound Laptop battery, but the thing keeps its RAM active even when off (Silicon Disk feature), so one generally needs to keep it plugged in, and that means recharging after partial discharges, which is great for lead acid, but death for NiCd. But NiMH...? Jeff Walther -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
Re: Mac Portable HD dilemma
Do NiMH batteries have the same memory phenomenon if not fully discharged as NiCd batteries do? I might like to look at a NiMH replacement for my Outbound Laptop battery, but the thing keeps its RAM active even when off (Silicon Disk feature), so one generally needs to keep it plugged in, and that means recharging after partial discharges, which is great for lead acid, but death for NiCd. But NiMH...? Jeff Walther No, coming from a model aircraft back ground I know that they don't have the memory problems of the NiCd cells Eddie Smith -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
Re: Mac Portable HD dilemma
On Dec 20, 2005, at 8:59 PM, Eddie Smith wrote: No, coming from a model aircraft back ground I know that they don't have the memory problems of the NiCd cells That adds a new dimension to the phrase system crash :-) John -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
NiMH batteries Re: Mac Portable HD dilemma
--- Jeff Walther [EMAIL PROTECTED] wrote: Do NiMH batteries have the same memory phenomenon if not fully discharged as NiCd batteries do? I might like to look at a NiMH replacement for my Outbound Laptop battery, Nope, no problems with NiMH. Might want to fix it up with a snart charger that'll switch from full charge to just a trickle when it senses the cells are fully charged. The so-called memory effect isn't a big problem. Poke this NiCd memory effect into Yahoo for more info. Do not try to replace the battery with Lithium Ion or Lithium Polymer Ion cells. Those require a complex charger with a thermistor to monitor the temperature of the cells. Charging them too fast will make them overheat and get ruined or they can even explode. It will be total Fandemonium! August (Fri) 4th, (Sat) 5th (Sun) 6th, 2006 http://www.fandemonium.org __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
Re: Mac Portable HD dilemma
this may sound odd but i read somewhere that you can use a cheap wall-brick with the same output voltage as the battery a put it in place of the battery and plug the regular PSU in and it should power up (the wall brick will simulate the battery in order to trick the portable to boot great design eh?) On 18/12/05, Macintalk Fejlesztés [EMAIL PROTECTED] wrote: I have a Mac Portable that I used back in the old days, and I have lots of files on it. However, it does not work anymore, because the battery in it is dead and it won't run off a power supply. I want to put the HD in another Mac to get the files off it, but the Conner HD in the portable is a different format (some SCSI variant) - how to convert it to work with a regular, desktop SCSI? -Mackie -- --sam http://mephitus.renamon.org/ When you've done something right, no one will be sure you've done anything at all. -- Futurama -- -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
Re: Mac Portable HD dilemma
--- Samual Acorn [EMAIL PROTECTED] wrote: this may sound odd but i read somewhere that you can use a cheap wall-brick with the same output voltage as the battery a put it in place of the battery and plug the regular PSU in and it should power up (the wall brick will simulate the battery in order to trick the portable to boot great design eh?) The Portable always runs off the sealed lead-acid battery. Let it get too low and *pfft!* it's kaput. A modern replacement shouldn't be so sensitive. When plugged in, the charger circuit keeps topping up the battery as the Mac drains it. Apple chose lead-acid because of the longer run time it could have VS the Nickle-Cadmium technology of the time. The drawback was higher weight and the sensitivity to too much discharge. An interesting thing is that in most applications, NiMH cells can directly replace NiCd cells. They're the same voltage but NiMH has a higher energy density so it'll run things longer. A NiCd charger will work just fine on NiMH cells, it just takes longer than a higher rate charger designed for NiMH cells. Some smart chargers for NiCd may have problems where they'll shut down before NiMH cells are fully charged. Replacing lead-acid batteries with a bank of NiCd or NiMH cells is a bit of a problem since LA is 2 volts per cell and the others are only 1.2 volts. If the LA being replaced has a total voltage evenly divisible by 1.2, then use that many NiCd or NiMH cells to replace the LA. Be sure the amp-hour or miliamp-hour rating matches or exceeds the original LA battery! It will be total Fandemonium! August (Fri) 4th, (Sat) 5th (Sun) 6th, 2006 http://www.fandemonium.org __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
Re: Mac Portable HD dilemma
On 18-dec-05, at 10:14, Macintalk Fejlesztés wrote: I have a Mac Portable that I used back in the old days, and I have lots of files on it. However, it does not work anymore, because the battery in it is dead and it won't run off a power supply. I want to put the HD in another Mac to get the files off it, but the Conner HD in the portable is a different format (some SCSI variant) - how to convert it to work with a regular, desktop SCSI? 1. you can boot the portable off a powerbook 180 adapter. these are 45Watt. remove the battery and boot. 2.The hardrive is mechanical equivalent to the 40Mb drives used in classics. swap the pcb on those drives to get to your data. after that. swap back and your classic is working again. Are you sure? My Classic II has an IBM drive, and the Classic I has a Quantum drive I think. I do have a PB 180 adapter, I'll give it a go. Thanks! -Mackie -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
Re: Mac Portable HD dilemma
On 18-dec-05, at 13:36, Macintalk Fejlesztés wrote: On 18-dec-05, at 10:14, Macintalk Fejlesztés wrote: I have a Mac Portable that I used back in the old days, and I have lots of files on it. However, it does not work anymore, because the battery in it is dead and it won't run off a power supply. I want to put the HD in another Mac to get the files off it, but the Conner HD in the portable is a different format (some SCSI variant) - how to convert it to work with a regular, desktop SCSI? 1. you can boot the portable off a powerbook 180 adapter. these are 45Watt. remove the battery and boot. 2.The hardrive is mechanical equivalent to the 40Mb drives used in classics. swap the pcb on those drives to get to your data. after that. swap back and your classic is working again. Are you sure? My Classic II has an IBM drive, and the Classic I has a Quantum drive I think. I do have a PB 180 adapter, I'll give it a go. Thanks! Some classics have a connor cp4045 drive. a black rounded case. i've swapped a few of my portable drives with spares from classics due to the sticky mess used to seal the cover of the plates dripping on the plates and ruining the disk. At least 2 of my 4 Portables had that problem. I recall that the disk labels are green or red, but the mechanical parts are identical. the quantum 40Mb/80Mb were used on later SE's (fdhd) and SE/30. Like the IIci and CX at the time. The early SE's used a Miniscribe 20Mb (i can recognize the sound from about 100 meters...) -- met vriendelijke groet Simon Claessen [EMAIL PROTECTED] -- Vintage Macs is sponsored by http://lowendmac.com/ and... Small Dog Electronicshttp://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac http://lowendmac.com/lists/support.html Vintage Macs list info: http://lowendmac.com/lists/vintagemacs.shtml -- AOL users, remove mailto:; Send list messages to: mailto:vintage.macs@mail.maclaunch.com To unsubscribe, email: mailto:[EMAIL PROTECTED] For digest mode, email: mailto:[EMAIL PROTECTED] Subscription questions: mailto:[EMAIL PROTECTED] Archive: http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/ iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
