However one of the drawbacks of using DSLRs for shooting video is that the cameras have a short battery life. This means that for a long shoot, one has to carry along multiple batteries which will require constant changing.
One way of dealing with this drawback is to connect the camera directly to a power supply using some kind of adapter.
The adapter I use with my Canon EOS Rebel T3i (600D) is the PowEver ACK-E8 Replacement AC Power Adapter (a link to which is in the description).
Basically the adapter allows the camera to run on power supply from any socket and one can record for as long as they want (only limited by storage capacity).
Of course the major drawback is that one has to have access to a socket and therefore mobility is limited. But for interviews, presentations, conferences, vlogs, tutorials etc where one does not have to move around, it is quite helpful.
ADAPTER:
PowEver ACK-E8 Replacement AC Power Adapter https://www.amazon.com/PowEver-ACK-E8-Replacement-Adapter-Supply/dp/B019RIQND8/ref=sr_1_1?ie=UTF8&qid=1480921390&sr=8-1&keywords=powever+ack-e8
ORDERED VIA:
I ordered it through www.ugunlocked.com based in Kampala.