Is it necessary to buy a powerbank
I have a doubt, do the powerbank can charge the battery plugged in camera? My camera battery can be charged with the PC USB port.
When I view the amazon and find a very interesting cartoon powerbank , the amazon page below
I think it is very useful for me with my bag, but I do not know it can be used as a power supply for camera, it can replace the spare battery?
Nikon D3100 14.2MP Digital SLR Camera with 18-55mm f/3.5-5.6 AF-S DX VR Nikkor Zoom Lens