It's probably just me, but the battery life only lasted for less than an hour. My original battery always lasted for 5+hours.
As a teenager, I love to go on the PSP for at least a few hours, so I'm back to having the charger out and plugging it in when I'm on it now. It's definitely not worth the hassle of sending it back for a 'warranty'.
Out of all the products I've wanted to purchase on Amazon, this is the only product that has disappointed me.