As you know Vivitar is a marketing company. All their products are made by someone else with their name on it. Vivitar batteries for your canon could be coming from the same source.
Photoninny wrote:
I've never seen them mentioned here, but Vivitar markets a line of camera batteries, including for Canon and Nikon. I have a pair for my 70D and have not seen any difference between them and Canon brand. Amazon carries them for $28 for two, including a travel charger.
Anything you get, make sure the chip is compatible so that the camera will correctly report the battery's charge level.