Abstract: An apparatus may include a controller and a relay device for measuring voltages associated with a battery and determining resistances associated with the battery that can be used to determine whether there is a battery ground associated with the battery. The relay device may comprise one or more switches that may be coupled to the battery for measuring the voltages. The relay device may be configured to implement an automated configuration sequence of one or more configurations of the one or more switches in order to the measure voltages. The controller may determine resistance values based on the measured voltages values. Based on comparing the resistance values to a threshold, one or more battery grounds of the battery may be determined and a notification may be output based on the detected one or more battery grounds.

Abstract: A portable descent mechanism is disclosed which allows the use of a conventional window as an avenue of escape in emergency situations such as fires and comprising a passenger chair, spools with cable wound thereon, a brake, and window attachment apparatus designed for simple engagement with a conventional windowsill and utilizes a pair of hooks that fit over the windowsill.