My wife has a Dell 1545 and I was worried the battery wouldn't work on the 1545 like I read in many reviews, but I took a chance on it since I wasn't worried about returning it through Amazon. The battery is charging no problem and working great. No longer have the message about battery life popping up on the screen every time the computer is turned on.
You'd be a Bonehead not to try one of these shirts if you've never worn one before. I live in Southern AZ and having a shirt that can help keep you cool is a must. I've worn several different Columbia shirts in the past and this won't be the last. Plus the price was an added bonus.