What are the best battery grips for a Canon camera if I want to keep shooting for hours and not worry about the power dying? Sorry if this is a really dumb question I literally just started getting into photography like a month ago and I dont really know what I'm doing yet. I have a Canon 90D that I got used and I was trying to take pictures at my cousins graduation last weekend but the battery just quit on me right when they were walking across the stage which was super embarrassing. I saw some people have these big attachments on the bottom of their cameras and someone told me they hold extra batteries?? I looked online and the official Canon brand ones are like 200 dollars which is crazy because my budget is closer to maybe 80 or 100 max since I already spent so much on the lens. Are the cheaper ones on Amazon like Neewer or Vivitar actually safe to use or will they like fry my camera? I have a big local street festival coming up in Chicago in two weeks and I really want to be able to shoot all day without carrying a pocket full of loose batteries. Is there a specific one that everyone likes that wont break the bank? I just want something reliable so I dont miss the shots again...