Dual power, so solar and battery. Remove the screws on the back. It will be some type of button battery.
Casio Electronic Calculator Dual Leaf SL-200 High Power ...
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Vintage Retro Casio SL-200L Dual Leaf Two Power Electronic Calculator. $4.25. + $6.75 shipping. Casio Solar Calculator Dual Leaf SL-200 Black Solar Powered ...
Features: Solar Powered, Foldable
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removed back no battery or place for battery. just a circuit board
It may be on the other side and it may also be a small soldered battery. Anything that looks like this
https://www.google.com/search?q=soldered...
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Here you go, it says 'TOP cover'. I was sure it would be from the back. I don't see fixings on the top cover?
I just replaced my battery. Remove the two small screws that fasten the top cover and pop it off. It requires a AG10 battery or its equivalent. (GP189, SR54, LR1130, etc)
M. Corbett · April 26, 2018
https://www.amazon.com/ask/questions/TxZ...
and more here but not a lot, more generic on Casio in general. They all need some type of battery so you can use it indoors.
https://www.google.com/search?q=Casio+SL...
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