I wanted to replace my several-year old Canon battery that is having a short life. Upon receiving the Lenmar battery I charged it completely and alas, it only lasted 20 pictures in my camera. I discharged it completely and did a complete charge again. It still dies quickly, even worse than my old OEM Canon battery.I understand that I may have just gotten a bad battery and I will order another one. If it works as well as OEM Canon batteries, then I'll write another review with 4 or 5 stars to balance out my 1-star review here.