The phone works great, but its short battery life is the only drawback.

drawback 是由动词 draw（拉、拖）和 back（向后）组成的复合名词，字面意思是"向后拉"，引申为"缺点、不利因素"或"美中不足"。这个词形象地表达了某个优点被缺点拖后腿的情况。