HP-28S battery door

[rprosperi]

(09-05-2018 01:53 AM)Jlouis Wrote:  There's a guy in Curitiba, Brazil, that modifies the clamshell calculator, putting the batteries on the back. I just saw photos, but looks like it was made by HP. I 've bought calculators from him, but never bought one modified. He sold recently one 19bII with the modified back door for the equivalent of 100 us dollars.

I have no affiliation with him in whatever way.

Here is a link for an advertisement.

Thanks for sharing this JL, however, when I follow this link, I don't see any clamshell machines at all; do I need to navigate somehow from that page, and if so, what do I click?