should answer for us? yeah. jeff, it s richard quest in new york. the ceo of malaysia airlines says that the batteries on the pinger were due to expire in june of this year. now, those batteries are normally have quite a long life span. should we be concerned that even though they re not at the expiration date, they re pretty close to it, and would they still have had sort of maximum oomph if you like? so our design and validation process does confirm at the end of six years that the device will still operate for 30 days. we do have design margin in there, so when we published, it was at the end of live at the battery at the time it s due for replacement. if the battery needs to be replaced in june, it will still operate for 30 days and actually there is a slight design margin