Can I buy a spare battery?
The Moobox cameras are sealed units to avoid water and dust ingress, particularly important for the outdoor ProXT cameras. So batteries cannot be changed within the cameras.
The way around this is to simply buy additional cameras and have on standy-by for each swap-out for the one you need place on charge at any given time.
From zero to full charge takes around 3hrs so it's not too long a downtime should you need to charge it and are unable to consider a standy-by camera.