Data retention - lifetime prediction of modern calculators

[Don Shepherd]

I agree with Max.

I have two HP-65's from around 1974, 44 years old, and both still work, the only problem (in the past) being the gummy wheel in the card reader which is a well-known flaw. I have an original Pulsar digital watch from 1973 that still works fine. All things considered, items that were well-made tend to last as long as the owner takes care of them.

I have a PC I no longer use that still works after about 15 years. I had to replace the power supply once.

I have two tablet computers that still work after five or six years. The batteries in my Chromebook failed after less than a year; they were replaced under warranty. I do not like the fact that these batteries are not user-changeable; I would have to take them to an electronics store to replace them now and I'm sure it would not be cheap.