External battery

So my coworker comes by to tell me a story. Apparently one of our retarded coworkers came by and told him that her laptop battery was no longer charging and requested a new battery. He went ahead and ordered one and let her know when it came in. When he proceeded to give her the new battery she told him "You must have misunderstood me. I meant the 'external battery'." At the point my coworker was at a lost for words. How can someone who works in IT not know what an AC ADAPTER IS? And how she came to the conclusion that it was an "external battery" we will never know. Retards never cease to amaze us.