A mounting structure for LED lighting sources, includes a support body having attached on one side thereof a circuit board for mounting the LED lighting sources. In order to create a vacuum conveying apparatus that can guarantee a more precise weighing andor a more accurate stipulation of the timepoint for turning off the vacuum pump or for interrupting the suction process during the ongoing conveyance process, the vacuum pump is isolated in terms of force from the separation container and is also situated such that it is not weighed. The disclosed method and system prevent over or under reporting of battery capacity due to the transition between charge and discharge curves in a battery model. The first annular flange defines a tapered angled edge for insertion through an opening formed through the patient’s tympanic membrane.