I have a ti-89 calculator that I use for college classes, and it runs off of 4x AAA batteries.
If it's not in use for a period of time, I try to turn it back on and the batteries appear to be dead.
Anyone know why?

cant answer the question, but i would just take out the batteries whenever im not using it*

This post was edited by cletus7seven on Mar 30 2010 10:39pm

well i've started doing that, but it kind of becomes a hassle because it resets all of my preferences when i take the batteries out

I have a ti89 titanium. It does not lose its setting when I replace the aaa batteries. There is a second battery that looks more like a watch battery that is supposed to retain your settings while the regular batteries are being changed. In fact I can change the batteries in the middle of a calculation and it will still be there when I put them back in. Maybe you should look into changing the "watch" battery.

Also as far as battery life goes, I use mine almost every day and I have to change the batteries about once every 2-3 months. My only complaint is the low battery indicator does not seem to give you much warning. If you see it lit up, finish what you are doing and change the batteries immediately IMO, you don't have long!

This post was edited by Azrad on Mar 31 2010 10:35am

As far as the "watch" battery goes, I could probably change it.

But mine is not a titanium. Its an older model, and there is no battery indicator.

And its not that it cuts off while in use, its that when im not even using it and its turned off like overnight or something, ill wake up and try to turn it on and the batteries will be dead and it wont cut on.

Defiantly change the CR/watch battery.

Either it is helping drain the AAAs or there is a short somewhere in the calculator. I've had my TI-89 for about 12 years and as I recall, I've changed the batteries less than a 1/2 dozen times. I been running mine on generic AAAs for a couple years now actually but I will say I don't stress it as much, as I did when I was in college.

haha yeah i hear you. well chemistry is killing it right now. but thats probably what it is. ill just change the watch battery and see how that goes

has a short somewhere just take the batteries out