Posts: 610
Threads: 53
Joined: Aug 2005
Hello,
Standard AA pacs will run perfectly and far better than the original pacs !
Thibaut
Posts: 1,788
Threads: 36
Joined: Aug 2007
You can replace the cells in the pack with AA Nicad or NiMH cells. The NiMH cells have a much larger capacity, are more enviromentally friendly, and don't have the "memory effect" problems of NiCad cells. They take more time to charge than the older Nicads (directly proportional to their greater capacity). The old Nicads were around 600 maH. NiMH cells can be found from 1200-1800 maH.
One thing to consider is that the HP29C is the most fragile calculator HP ever built in terms of what can happen if it is connected to the AC charger with a bad battery pack (or no battery pack) installed. If at all possible, charge the batteries in an external charger or a different Woodstock series machine.
Posts: 212
Threads: 80
Joined: May 2008
I use standard AA's in mine. You can modify the original battery pack's plastic housing by cutting away the plastic piece which runs in between the batteries.