Planes, satellites and else are very energy-demanding. In the case of planes, batteries are still far from replacing kerosene. Yet, we will note that supercapacitors have already been used in the A380 and more precisely regarding doors opening in case of emergency.
Electrochemical storage is equally essential in the medical field with however a bigger use of cells than batteries until now. Pacemakers and hearing aids, to name but two, use batteries. Recent developments, notably regarding treatments of heart disease (heart pumps and else), involve batteries that can be recharged by induction. Yet, this kind of applications demands smaller and smaller devices but having more energy to ensure multiple functions.