Don't use generic battery chargers, PSP gets angry
First, the scent of something burning. We all know the smell of something plastic on fire -- it stinks and the black smoke sticks to the wall like nicotine to the lungs. That's where the smoking analogy ends, since the PSP battery exploded so forcefully that "it flipped the PSP off of the nightstand." There you have it -- get an official replacement from Sony or make super-duper sure that an off-brand charger will work properly with your PSP.