twesterm on 22 July 2007
I'm assuming the PSP battery is about like the DS battery in the way it degrades a small amount with each charge and I'm sure it takes longer than a year to degrade 20%. The DS is something like after 500 charges it drops to about 70% of its life. I know the PSP has a short battery life, but I imagine it lasts long enough so that you don't charge it 500 times in a year.
