One of my kids bought me the 3/8 drive digital torque wrench for Father's Day a few years ago. When I pulled it out of the toolbox the other day the batteries fell out and the battery end cap is MIA. Is there some sort of hack to replace the battery end cap so that the wrench will function. It seems a shame to throw away a $160 wrench simply because the cap is not available to purchase. It's one of those twist end caps similar to a flash light. Maybe a little ground wire soldered to the tool and tape the batteries in place with the wire on the back of the battery negative?