longest battery life - is this a record?

[orangeleavesinautumn]

I am still using the calculator my father bought for my O levels - if not daily, then certainly weekly. No battery change - in fact, I am not sure if the battery is even changeable, I can't see a battery compartment that can be opened.

just over 40 years now.

Is this a record? Does anyone have a battery that has lasted longer?

Ooh, nothing that can compete with that!

And not one of the little solar panel ones?

no solar panel, no. Did solar powered calculators exist in the 1980s?

Hate to tell you... it's got a little solar panel? Four or five little shiny squares somewhere near the screen?

Yes they did exist in the 80s

Definitely.
I'm 51 and had solar ones doing my GCSEs and Alevels.

No, nothing like that

Pics or it didn't happen 😁

Similar to this, although would have been a scientific one.

We need a photo of this amazing calculator

its a Texas instruments one, from 1984

like this
https://www.ebay.co.uk/itm/203522051509

Theres literally a picture of the removable battery cover on that listing.

its like that, not exactly the same- I cant see a removeable battery cover on mine, unless I unscrew the whole back, maybe, but I am not going to do that

I still sometimes use my 1976 scientific calculator - a Casio fx-19 this model. I like the green display - most other calculators of the era had red display.
The batteries last forever. I keep it in the kitchen junk drawer, and it is mostly used to convert g to ounces when cooking. Can't say I use the log function these days, but when I got it it effectively replaced log tables.

wow! a decade older than mine!