SHREL233SB - EL233SB Pocket Calculator is not dual powered. This product is battery powered only.
The replacement cartridge for your calculator is item DPSR1180 . Which can be found at the link below :
If your calculator has a mechanical issue it has a one year warranty which can be carried out with the manufacturer Casio® . Their contact number is 800-638-9228 .
We appreciate your question, have a great day .
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