Emergency (back-up) battery adaptation examples:

Switch off emergency battery prior to disconnecting vehicle battery. See EXAMPLE: SWITCH OFF EMERGENCY (BACK-UP) BATTERY .
Switch on emergency battery after reconnecting vehicle battery or reinstalling emergency battery after removal. See EXAMPLE: SWITCH ON EMERGENCY (BACK-UP) BATTERY .
Reset emergency battery time register after installation of new emergency battery. See EXAMPLE: RESET EMERGENCY (BACK-UP) BATTERY TIME REGISTER .