| 20110223879 | Method and Arrangement for Operating a Mobile Battery-Operated Personal Emergency Signal Device - The invention relates to a method for operating a mobile battery-operated personal emergency signal device, wherein a check of the charge of the battery feeding the personal emergency signal device is performed at least in the course of initiating the personal emergency signal device, wherein the operation of the personal emergency signal device is permitted by a central device depending on the result of the check. The invention further relates to an arrangement for performing the method. | 09-15-2011 |
