>> The micro battery is a next-generation technology with a size 30 times smaller than current battery that can quickly charge 1,000 times faster.
When you’re actually under the water and your life depends on that battery, those parameters are sort of not the important ones. :-)
Its fairly easy to do an emergency ascent with zero air from 40 feet. It can be done from 100 but its not something I’d like to do.
The air in your lungs expands as you rise, giving you more oxygen then you think you have. The big problem is you have to exhale all the way or your lungs will blow out.
Probably supply enough oxygen for micro people.
i suppose t could be made with a backup battery as well.