Question about Texas Instruments TI-89 Calculator

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Minimally used calculator drains batteries fast

My Ti-89 is only a few months old (maybe 6), but I've already had to replace the batteries three times. They were all brand new sets, Duracell, but the calculator still drained the batteries rapidly. I only use it for basic stuff and no games. The two times I've replaced the batteries, Illegal Instruction popped up. I've reset it both times, but I don't want to keep doing this. Once I need the calculator for more advanced stuff, I can't afford to lose the memory. What's going on with my calculator?

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Hello,
The draining of batteries depends on usage. Turn calculator off when not in use. Use rechargeable batteries: Have two sets of them and change batteries before the ones in use are not fully discharged.
If you get tired of that, I suggest you have the calculator repaired.

Hope it helps.

Posted on Sep 13, 2009

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Posted on Jan 02, 2017

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