Method and arrangement for advising when radio pager battery req

Communications: electrical – Condition responsive indicating system – Specific condition

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34030915, 34082544, G08B 2100

Patent

active

054247217

ABSTRACT:
In order to obviate the tendency for batteries to be changed at an overly early timing, the battery voltage is monitored and a first alarm is issued when the battery voltage drops below a predetermined level. The issuance of the first alarm sets a timer which times a predetermined period and issues a second alarm upon the expiration thereof. The length of the predetermined period may be adjusted by the user and the time from the issuance of the first alarm may be shown on a display upon demand.

REFERENCES:
patent: 4345603 (1982-08-01), Schulman
patent: 4380726 (1983-04-01), Sado et al.
patent: 4471492 (1984-09-01), Mann et al.
patent: 4755816 (1988-07-01), Deluca
patent: 4876632 (1989-10-01), Osterhout et al.
patent: 5140310 (1992-08-01), DeLuca et al.

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