Ambulatory infusion device with variable energy storage testing and method for testing an energy storage

Ambulatory infusion device, comprising:

• an energy storage for storing electrical energy utilized for powering the ambulatory infusion device, the energy storage serving as a primary power source of the ambulatory infusion device, the energy storage being successively depleted during application;
• a dosing unit with an electrically powered actuator and an electronic controller, the electronic controller controlling operation of the electrically powered actuator;
• and
• a testing unit for testing the energy storage, the testing unit configured to repeatedly carry out a test during operation of the ambulatory infusion device, the test including determining a control variable, the control variable being indicative of a capability of the energy storage for further powering the ambulatory infusion device,
• wherein the testing unit is configured to vary the testing of the energy storage in dependence of the control variable.