However, for daily travel, the endurance of more than 5 hours always feels uneasy. It's best to take a mobile power supply with you. Of course, you can also charge it through the USB interface of your laptop.
Of course, the reason why MiFi devices are not well known is that the traffic tariff is still too expensive. However, with the large-scale spread of 4G, the traffic tariff has been basically reduced to psychological expectations, and there is room for further reduction in the future.