NOVELTY - The apparatus has a cap insert (16) and a conductive cap (14) in polymer material respectively making electrical contacts with internal negative and positive battery contacts (18, 20) when the apparatus fits inside a battery compartment (B), such that a connection is formed between an external power source and an alarm unit. The alarm unit is activated to transmit an alarm signal to an external alarm if the connection is broken or the apparatus is removed from the compartment causing the cap insert to be dislodged, to break electrical contact of the apparatus with the compartment.    USE - Connection apparatus i.e. battery power supply substitute apparatus, for connecting an external power source and an alarming unit for a battery powered hand-held electronic device e.g. cell phone and MPEG-1 Audio Layer 3 player, on a display.    ADVANTAGE - The alarm unit is activated to transmit the alarm signal to an external alarm if the connection is broken or the apparatus is removed from the compartment causing the cap insert to be dislodged, to break electrical contact of the apparatus with the compartment, thus preventing pilferage of the device. The apparatus permits to continuously deliver the current to the electronic device from the external source, thus eliminating the need to replace the batteries of the electronic device on the display. The apparatus can easily accommodate to the power requirements of the small hand held device using disposable batteries. The apparatus can be easily and conveniently used with the battery powered electronic devices.    DESCRIPTION OF DRAWING(S) - The drawing shows an enlarged view of a cavity in an end of a conductive cap, typically a negative conductive cap of an apparatus for enable convenient connection to an external power source and an alarming unit for a battery powered hand-held electronic device on a display.    Battery power supply substitute apparatus (A)    Battery compartment (B)    Battery powered hand-held electronic device (D)    Conductive cap (14)    Cap insert (16)    Internal negative battery contact (18)    Internal positive battery contact (20)