Apple's voice assistant Siri does a lot of things iPhone users ask her to do; maybe not always perfectly, but at least their somewhat related to the request. However, it has recently been discovered that asking the device to charge the battery triggers the software to start calling emergency services. It's not clear if this is a bug — though most likely it is — or exactly why this happens. Perhaps part of an unannounced security feature? Either way, it's something to aware of, and avoid if possible.