HP 35s Battery Life

[Dieter]

(08-31-2017 11:29 AM)Mox Wrote:  My question is regarding battery life, as an engineer I use my scientific calculator for about two hours a day most days of the week and looking at images online the 35S appears to use 2 x 2032 button batteries. Has anyone experienced issues with time between battery changes?

FWIW, I have been using the 35s since it was available in 2007, and with regular daily use the average interval between battery changes was about 1,5...2 years. Only in the first time with heavy use and lots of programming the batteries (the ones that came with the device) had to be replaced after a year. Today, with less regular use, my 35s still runs on batteries that have been changed 2,5 years ago.

Be sure to replace the batteries soon after the low battery warning appears in the upper right corner of the display, especially if you are running programs. The battery symbol is quite hard to see and can easily be overlooked.

Dieter