11Terms and Symbols used in this manual• The term “unit” in this manual refers to the CASSIOPEIA.• The symbol “Important ” indicates important information about a procedurethat can result in problems if not performed correctly. Be sure to read suchinformation carefully.User Maintenance ........................................................................................... 27Batteries ................................................................................................................ 27Replacing the Main Battery ............................................................................ 28Replacing the Backup Battery ........................................................................ 29Charging the Battery Pack .............................................................................. 31Resetting the Unit ................................................................................................. 32Performing a Reset ......................................................................................... 32Memory Error Message .................................................................................. 33Full Reset (Memory Initialize) ............................................................................. 34Performing a Full Reset .................................................................................. 34Errors Following a Full Reset ........................................................................ 35Troubleshooting .............................................................................................. 36Appendix .......................................................................................................... 40Button Operations ................................................................................................. 40Specifications ....................................................................................................... 41Regulatory Information ........................................................................................ 42