My TI-74 / TI-324 system - Battery standby time

[+wolhess]

TI-74 Basicalc and TI-324 printer endurance test for more than 9 months

 

Hello, everyone,

 

On September 22nd, I put new batteries in the TI-74 computer and TI-324 printer and loaded a small test program onto the 8K Ram card.

 

I wanted to test how long a set of batteries can operate the small system in standby.

 

For this purpose I switched on the TI-74 several times a month, started the program and printed out a text line "Test on date".

 

I was able to do that for a period of more than 9 months.

 

The system ran until July 30, 2022 and then showed an I/O error after printing.

The printer image also became very pale, as can be seen on the printout.

 

  

 

 

The TI-74 still ran without problems, but the printer battery was too weak to use the printer.

 

I replaced the batteries in both devices and ran the test again. Let's see if the devices will be ready for operation for a second time.

I expect the result in April/May 2023.

 

Here is the documentation of the test on the printout:

 

 

 

 

 

 

[+dhe]

Carbon Zinc, Alkaline or Lithium?

[+wolhess]

4 hours ago, dhe said:

Carbon Zinc, Alkaline or Lithium?

I used normal Alcaline batteries from a discounter.