☑️ How to charge the oxygen capsule?
If you use oxygen capsules for medical care and other purposes, an empty tank is definitely not useful for you. If you are on oxygen therapy, use a home refill system to refill your tanks.
The most common is a home filling device connected to an oxygen concentrator or a liquid oxygen device. If you have a large compressed gas cylinder, such as the type used in scuba diving, you will need to refill it, as there are companies that refill or replace these tanks.