The HP-15C is a high-end scientific pocket calculator with a root-solver and numerical integration. A member of Hewlett-Packard Voyager series of programmable calculators, it was produced between 1982 and 1989. The processor used the then new technology of Silicon on Sapphire that allowed ultra-low consumption. The 3 button batteries provided often lasted decades!
For many users, it is the pinnacle of HP calculator engineering together with the HP42s. Due to its popularity, and based on the then-new HP12c ARM-based platform, it was reintroduced in 2011 as HP15c Limited Edition. It was 150 times faster than the original, but it had higher consumption and the batteries would last around 4 months or normal use.
On May 2nd, 2023 HP announced the new HP15c Collector's Edition: the new version, with more speed, more memory and more battery life than the previous iteration.
HP15c enhanced pack - B stockProduct no.: HP15c_Enhanced_BNo more units available
Old price
139.99 €
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New HP12C battery cover - new modelProduct no.: HP12c cover[1]16.00 € *
Old price
17.00 €
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HP15C Collector's Edition B-stockProduct no.: HP-15c #INT_2_Bstock85.00 € *
Old price
129.99 €
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Self test procedure for the HP15c Collector's Edition
Some links to HP15c resources
Some interesting videos about HP15c
How to use The Calculator Store cable for programming HP15c, HP12c and HP10bII calculators