Method and apparatus for determining the remaining operating time of battery-powered appliances
First Claim
1. An apparatus for determining the remaining operating time of an appliance that is switched on and off and powered by batteries or accumulators, which apparatus determines and indicates the remaining operating time by measuring and evaluating with an evaluating electronics the battery voltage, wherein the apparatus has an EEPROM which stores the value of the battery voltage at the instant of switching off the appliance, wherein the apparatus is configured to send the value of the battery voltage stored in the EEPROM to the evaluating electronics when the apparatus is switched on and the value of the battery voltage is used as a basis for evaluating and displaying by the evaluating electronics.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for determining the remaining operating time of an appliance powered by batteries or accumulators determine and indicate the remaining operating time by measuring and evaluating the battery voltage wherein an EEPROM is provided which stores the value of the battery voltage at the instant of switching off the appliance.
-
Citations
8 Claims
- 1. An apparatus for determining the remaining operating time of an appliance that is switched on and off and powered by batteries or accumulators, which apparatus determines and indicates the remaining operating time by measuring and evaluating with an evaluating electronics the battery voltage, wherein the apparatus has an EEPROM which stores the value of the battery voltage at the instant of switching off the appliance, wherein the apparatus is configured to send the value of the battery voltage stored in the EEPROM to the evaluating electronics when the apparatus is switched on and the value of the battery voltage is used as a basis for evaluating and displaying by the evaluating electronics.
- 3. A method of determining the remaining operating time of an appliance powered by batteries or accumulators, which by measuring and evaluating the battery voltage determines and displays the remaining operating time, wherein the value of the battery voltage at the instant of switching off the appliance apparatus is stored in the EEPROM and when it is switched on the value stored in the EEPROM is used as a basis for the evaluation and display.
Specification