It seems like the battery life has become shorter now after I use my calculator for about 5 years. With fully charge batteries it could run at least 6 months, now it's about only 2 months; I use it as frequently as I used to. Is there anyway to fix it? Thanks.
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Assuming you have connected the correct charger - it sounds like the battery has reached the "end of life". There are only so many charge / discharge cycles a battery can accept, and yours has probably reached it.
If it is the solar version, expose the face of the calculator to direct sunlight or to a lamp. For the battery version, replace the battery. If that does not work, calculator may be at the end of its useful life.
Ah! that perennial desire for eternity. The calculator uses solar power. It also have a battery. Under normal circumstances you won't need a battery, may be if you are living through a long Nuclear Winter.
Any way, just get a battery with the same characteristics as the one that shipped with the calculator: voltage, thickness, diameter. That is what counts.
The life of the batteries depend on the use. If calculator is on and running programs 24 hours a day, the batteries will not last more that 2 or 3 days. If you use it the calculator for 2 hours a day, fresh batteries may last a semester. But I believe you want to check the CURRENT state of the batteries. You can buy from an electronic store or a dollar store a device that tells you if a battery is still good or not. With the TI Connect software you can check battery status. See the screen capture that follows. To obtain the displayed window you must click the button DeviceInfo with calculator connected to the computer and TI Connect running.
HP 10b Calculator requires two CR2032 Lithium batteries. The battery is 3 Volts,
3/4" in diameter and has an
estimated life of three years. Replace the
battery with CR2032 or an equivalent one.The
following brands are used interchangeably for this item: Energizer
(ECR2032), Duracell, Panasonic, Eveready, and 3M etc, which can be purchased from any local electronics store.
For further information you may refe to HP 10b Manual GoodLuck! Dont forget to appreciate the solution if I could have been of any help! CreativeTECH
There is a strong probability that your calculator is functioning correctly. The problem is that after replacing main batteries the screen contrast may become too dark or too light (your case). To fix this "problem" you must adjust the contrast. To darken screen:
Press [2nd] key and release it.
Press and HOLD the UpArrow
Keep pressing UpArrow until screen is dark enough.
Try this adjustment. I am confident it will bring your calculator to life. If it fails, post a comment to this thread and I will give your additional diagnostic procedures.
Hello, You may be right. I have left batteries in my TI92 for years without using it. When I put in fresh batteries, it came back to life. The backup battery of my TI92 (bought a dozain years ago) has not been changed yet.