Showing posts from January 24, 2016

Macintosh PowerBook 160 (1993) Battery ReCondition

I have successfully reconditioned the battery on my PowerBook to what I think will be its maximum life span (and probably the last time its ever used by an owner). How did I do it? Simple, zap it with a 20 volt laptop charger. These old PowerBook's had a 6 volt Ni-Cd battery (Ni-Cad) and they would do two bad things in their life; one being the battery gaining the "memory effect" and the other being it just wont charge at all. This was pretty simple to fix because most Ni-Cd batteries work the same. The memory effect is caused when you discharge the battery to a less-than-empty state and then recharge it to full again. It doesn't just happen with one time though, it happens over many cycles of not draining it all the way. After doing so, it seems to think that the point you drain it to is the maximum it can take so it wont discharge past that point (It "memorizes" where you discharge it to). The suggestion from Apple was to discharge the battery all the way…

Mac OS System 7.5.3 Floppies - PowerBook 160 upgrade

In this post I will describe how I upgraded my PowerBook (With a 40 mb hard drive) to OS 7.5.3. First I will talk about the challenges, then the resources.


Due to the fact that I only had 40 mb to work with, I ran in to a few problems. Using the free 7.5.3 files that Apple Provides, I had to copy the 1 .smi file and 18 .part files to the 40 mb hard drive. This proved to be impossible because, with a system already installed to boot (7.1.0) the space left was only a small 16 mb. Installing the MINIMUM software requires at least 18 mb.

7.5.3 was not in floppy form. It was downloadable in a form that you could put on floppies, but not use it directly from floppies. There was a way around this. If you can find the system 7.5.3 CD for motorola 68k (not PowerPC) there are floppy images on that cd. Those are what I am using and I will provide them for download on my Google Drive.

Mac OS 10.6.8 can not interact with HFS formatted floppies and my iBook G3 with os 10.4.11 can not pro…

1993 PowerBook 160

I scored an amazing deal for this 1993 laptop on eBay. The seller was exceptional and the item arrived a day early.


CPU: Motorola 68k (68030 with no FPU) at 25 Mhz

GPU: no clue. Info on this would be nice.

Hard Drive: 40 mb 2.5" SCSI laptop drive

RAM: 4 mb

Display: passive matrix 640x400 16 greys

Battery Life: about 8 seconds (I counted)

Battery: Original (I am going to try to recondition it)