Posts: 273
Threads: 31
Joined: Jul 2005
It needs a classioc series charger (35,45,65,67,70,80,55) Three female plugs. The 25 series had 2 prongs.
Get a pack rebuilt at batteries Plus or similar place.
Key bounce can sometimes be helped by opening and fixing the machine (be careful and learn how to do it)
Dave
Posts: 312
Threads: 25
Joined: Jan 1970
Like Dave said, you need the "classic" battery pack for this one; the HP-25 uses a different kind.
One word of warning, however -- the "classic" battery pack gives you only 3 hours of power after a full recharge of FOURTEEN (14) hours. It's always seemed disproportionate to me. If you can, try to find a different solution for your battery replacement. I don't know much about these things, but perhaps the HP-65 can be used directly from the AC adapter/charger, bypassing the batteries altogether.
Can anyone elaborate, please?
-Ernie
Posts: 899
Threads: 193
Joined: Jan 2005
Key bounce is simply just dirty key contacts. They are easily cleaned. A piece of fine grit emery under the contacts is all that is required to remove debounce. Just one or two passes is all that is needed. Don't over do it.
Taking the calculator apart without damaging the calculator is another trick that takes practice.
If you have the old battery pack, repairing it yourself is easy and costs less than $8. Three fine slits on the end to cut through the tabs that hold the pack together is all that is needed. 3 packs of batteries that are already welded are available. Almost dropin. Two easy solder operations is all that is required.
You can buy replacements, and save the work, but they do not have the look of the original battery pack.