I was taking apart a simple pocket calculator, interested in perhaps harvesting the solar cell(Texas Instruments: TI-1706SV) and i was looking at the circuit board and found where the solar cell was hooked up, but also i found a very tiny alkaline cell battery ( GP189 ). I was interested and fussed with it and took it out of its holding place, and then the calculator wouldn't work anymore. But i put the battery back in, and then it started working again. If calculators are supposed to run off solar cells, whats the extra battery in the board for? Is a calculator not able to run fully on a 1.5 volt solar cell?
Thanks
PS here is a pic i found online of it, (top picture) not exactly the same layout. theres only two wires in mine instead of the four shown in the pic, and they run from the solar cell, but the battery looks the same.
http://www.datamath.org/BASIC/LCD_Modern/JPEG_TI-1706SV.htm#PCB
Thanks
PS here is a pic i found online of it, (top picture) not exactly the same layout. theres only two wires in mine instead of the four shown in the pic, and they run from the solar cell, but the battery looks the same.
http://www.datamath.org/BASIC/LCD_Modern/JPEG_TI-1706SV.htm#PCB
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