Description
This is a Mac Portable Battery Eliminator solution. It entirely replaces the lead acid main battery and battery harness with Supercapacitors of 4 Farads total capacity.
You will be unable to use your Mac Portable in a mobile manner with this solution. It’s intended for wall power tethered usage only and is not a battery with any substantial capacity for mobile use. Currently this does not offer a PRAM retention mechanism.
Important Note!
This Battery Eliminator must only be installed in Mac Portables which have had their capacitors replaced and any related motherboard corrosion, fluid leakage, and damage fully repaired.
Running a Mac Portable without replacing the capacitors is a recipe for disaster!
These systems eat themselves alive without capacitor replacements, just like most vintage Apple (and other manufacturer) systems.
Testing Performed (On an M5120):
* Boot With Original Hard Drive
* Copy from Floppy to Original Hard Drive
* Boot from BlueSCSI
Tested and Working On M5126 Backlit Portable:
Testing performed by Techknight.
This ought to let you use 7.5 volt power supplies of greater than 1.5 amp current capacity, as it fully replaces the battery. The Mac Portable has a 7 amp fuse to the battery, because the battery is really what runs the system. The original 1.5 amp supply is just enough to trickle charge the battery while booted with original hard drive running.
Installation And Use:
* Refer to product images, which shows the product fully installed
* Remove the keyboard shroud (this covers the display connector, SCSI connector, etc)
* Unplug the original battery harness
* Plug the included jumper cable into the motherboard and route under the display hinge
* Hook the jumper cable to the Battery Eliminator
* Plug Battery Eliminator into the Modem slot
* Plug Power Adapter into the Battery Eliminator (not the original DC in jack, which now does nothing)
* Wait about 1 minute and 30 seconds (this is how long it takes to charge the supercapacitors)
* Boot
Removal:
* Unplug the DC power adapter
* Use the included jumper to bridge the “Discharge” header
* Wait about an hour for the supercapacitors to discharge to a safer voltage level
* Unplug from Modem slot
* Disconnect from the motherboard cable
