One thing that portable console owners know about the DS vs PSP is that the battery life on the PSP pales in comparison to the DS'. It's roughly double the time, though obviously the DS doesn't have the option for additional batteries in case your battery dies, but with around 15 hours of battery life while doing anything, that's not really a huge concern for the most of us.

PSP owners know that charging and have additional batteries is damned important, especially if there's a long 10-hour flight ahead or that the next recharge available will be in 3 days. Thus is the way of life on the road, even in today's times. 

The guys over at Maxconsole found a huge battery made for the PSP. Not big, not oversize, not even lol hueg. Epically massive. Now, I've seen my share of PSP batteries, and you may see some things on that in the near future, but damn this battery is a monster. It's so big that laughing is nearly impossible because the idea of having such a large battery is just preposterous. You have to see it for yourself to truly judge it.