Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Two thumbs down

The first time I used this battery the red "your battery is dying" light came on after I had taken maybe a dozen pictures and less than 20 minutes after I powered up the camera. Since I didn't use this battery until after the 30 day return period I couldn't return it to Amazon and I couldn't get a replacement from Panasonic despite a lengthy call to Panasonic Customer Service. So one moral of the story is to use the new battery immediately and keep using it until it runs down (which may take no time at all). And since I paid full price for this battery simply because it was the name brand, the second lesson is, buy the cheap batteries. Can they be any worse?