Instruct: Classify a given review as either positive or negative.
Query: Did not have high expectations, still let down.

I assume it is a lemon based on the fact that when fully charged, my camera only reads the battery at 25%. With the OEM batteries (2 in the battery grip) I have gotten 1500 shots before recharge. Change one Canon battery with this one, I get 800 on a good day. My Canon battery is 4 years old. I've used this one 10 times.