50g Backup Battery

[franz.b]

(11-19-2024 12:46 AM)rprosperi Wrote:  

(11-18-2024 07:44 PM)FLISZT Wrote:  Hello all,


Indeed, my advice was rather obvious.
I could have added “Et voilà !” for a touch of humor...or not, you never know.

On a more serious note, I too have noticed that CR-2032 battery life seems rather short, even though I've never bought high-quality CR-2032 (pack of 8 from Ikea). After storing one of my HP 50G for about 1 (more?) month (without AAA batteries), I had more than one “Memory Lost” when I wanted to use it again.

Perhaps two CR-2032s would have been better but was there enough space? Or did the designers think that it was fine as it was, and that the possibility of using a USB cable and/or an SD Card provided for the weakness of the battery? We may never know.

The purpose/role of the backup battery is to preserve the memory contents when the main batteries die long enough to let you install new main batteries. It is not intended to power the device and maintain memory for extended periods with no AAA batteries installed, so it's not surprising you had multiple memory lost episodes.

Also, given the important role these play, I would think you should use top-quality batteries from a proven vendor, but maybe that's just me...

Yes, I agree, but I have never used poor quality batteries or expected them to power the calculator for long periods. Memory loss for me occurs in the few seconds it takes to change AAA batteries.