It must have been good gunja
to go to a job and take DMM meter readings without a battery
His mistake was not offering the client a puff or two, or three...whoa!
Next time if he wants to be professional, he'll rock up with an analogue meter that will work in most modes without a battery, a pair of tangled leads to look the part
and a bag of awesome weed to blow the client away, and call in a straight electrical contractor to sort out the faulty electricals
Money for jam, too easy