of the anomalies. get as many direct signals as they can, erin and then maybe a much smaller box. >> tom, thank you. that is why they're rushing to race against the clock, why what they have now isn't enough. they need more. they need more to get this exactly right. richard quest joins me along with aneesh patel, president of duquesne sea com. authorities have confirmed at least one of this pingers was on board flight 370. they're saying the signals they picked up are weaker than what they got over the weekend. now we're possibly past the battery life. how much longer do you think the batteries have? >> well, we build in a design margin of about 10%. so we think they're going to go a few days longer than 30. after that, we call it bonus time. the battery is going to start to degrade. it sounds like we're in that period right now. so it could be a matter of days. in the lab we have experimented with this under laboratory conditions. we can get a very faint signal