Batteries need to be removed and carried on carry on luggage.
Devices with non removal batteries need to be turned off, including medical devices. Hearing aids?
No need for airplane mode on cell phones any more then, as they have to be turned off, also no ones doing work on a laptop while on a flight anymore.
Or have I interpreted it wrong. Just I see people using laptops on the movies on a plane, but maybe that's just the movies.