>> I believe the date is a little premature.  I purchased the Model HP-35
>> in the early 70's which was the model before the 45.  I still own it
>> and it still works just fine although I have upgraded substantially.

> I have one too and really like the RPN and the display angle -- BUT
> where do you get replacement NiCADs?

> Tried the local HP reps and they just giggle.


I have an HP-45.  I think the HP-35 used the same battery packs.
The pre-made ones are probably impossible to get from HP anymore.

Last time I needed batteries, I split the little plastic carrier
along it's seam.  Inside are 3 cells, each AA size.  I replaced
them with AA ni-cad batteries designed for flashlights  & toys.
After soldering them to contacts, I carefully glued the plastic
case halves back together.

Now I'd probably get AA size batteries designed for radio control
purposes from a local hobby shop.  Probably better quality and
certainly more amenible to soldering; downside, more expensive.

The supplied wall power cube can charge them fine.

                                                Lee Jones