Depending on what you're doing with it, your PSP battery can give you up to
10 hours of use per charge. But intense gaming sessions are more likely to last
about 3 or 4. That's not bad, but is it enough? Again, that depends on what you
want out of your PSP, but you could already be finding that those hours fly by
when you're having PSP fun.
The answer to this problem comes in the shape of MAX Power, a lithium battery
for the PSP, which will give you the same performance, the same amount of use
per charge and same total lifespan as Sony's official PSP battery, but for
approximately two thirds of the price. With a back-up battery to hand, you'll
never need to worry about draining your current battery again. If it runs out,
just swap the batteries over.