Casio PCR-T500 User Manual page 6

To use the cash register's basic function
Only use the specified batteries.
• Do not disassemble, modify or short-circuit them.
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• Do not put them in fire or water or heat them.
• Do not mix new and old batteries or different types of batteries.
• Orient the terminals +- correctly.
• Remove the batteries if the system will not be used for a long time.
• After batteries are spent, dispose of them as per local regulations.
• Do not try to recharge dry cell batteries.
Disposing of batteries:
• Make sure that you dispose of used batteries in accordance with the rules and regulations
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in your local area.
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Caution