HALO needs to be plugged in and does not have a built-in battery.
If you have an event and won't have easy access to a power source, here are some portable power supplies we recommend:
The 54k supply is suitable for events. 6+ hours battery life running HALO. Not allowed in carry-on luggage by TSA.
The 27k supply holds 3+ hours battery life running HALO. This option is allowed in carry-on luggage by TSA.