Yeah, safety is obviously the most important thing. Right now we're basing the safety claims on the those of the component manufacturers. But it's also going to be a function of the enclosure and component locations, etc. Once all of that is finalized, we'll have a 3rd party lab do abuse testing, crush testing, etc to make sure there aren't any bad failure modes. There's lots of good processes and test procedures already out there for doing that kind of testing on batteries.