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2. Solar-powered calculator - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_calculator

   Solar-powered calculators are hand-held electronic calculators powered by solar cells mounted on the device. [1] They were introduced at the end of the 1970s. [2]Amorphous silicon has been used as a photovoltaic solar cell material for devices which require very little power, such as pocket calculators, because their lower performance compared to conventional crystalline silicon solar cells is ...

3. TI-30 - Wikipedia

   en.wikipedia.org/wiki/TI-30

   TI-30Xa Solar School Edition (2004): a modified version of the TI-30Xa, without the fraction buttons. This calculator is approved for Virginia State Testing. [citation needed] TI-30X IIS and TI-30X IIB (1998): added a two-line, scrollable display and a D-pad for navigating previous results. Solar/battery and battery powered respectively.

4. TI-36 - Wikipedia

   en.wikipedia.org/wiki/TI-36

   TI-36 SOLAR was based on 1985 version of TI-35 PLUS, but incorporates solar cells. It addition to standard features such as trigonometric functions, exponents, logarithm , and intelligent order of operations found in TI-30 and TI-34 series of calculators, it also include base (decimal, hexadecimal , octal , binary ) calculations, complex values ...

5. Stand-alone power system - Wikipedia

   en.wikipedia.org/wiki/Stand-alone_power_system

   As the demand from the load does not always equal the solar panel capacity, battery banks are generally used. The primary functions of a storage battery in a stand-alone PV system are: Energy Storage Capacity and Autonomy : To store energy when there is an excess available and to provide it when required.

6. Calculator - Wikipedia

   en.wikipedia.org/wiki/Calculator

   A calculator which runs on solar and battery power Through the 1970s the hand-held electronic calculator underwent rapid development. The red LED and blue/green vacuum fluorescent displays consumed a lot of power and the calculators either had a short battery life (often measured in hours, so rechargeable nickel-cadmium batteries were common ...

7. Casio fx-3650P - Wikipedia

   en.wikipedia.org/wiki/Casio_fx-3650P

   Solar cell and G13 Type (LR44) button battery two way power [1] Casio fx-3650P II Casio fx-3650P is a programmable scientific calculator manufactured by Casio Computer Co., Ltd.