Detailed Tutorial by CG Netizens: Self-made PSP "Dummy Battery" + External Lithium Battery Box

I have been using the PSP for over a year now, and there is one issue that has been bothering me during the use of my little P - it consumes a lot of power.

One original battery only lasts for about 5 to 6 hours, which isn't very convenient when going out. Although I can use an external power source at home, this will limit its portability and defeat the purpose of having a handheld console. I've seen online that some people make external battery cases using size 5, 7, AA, or AAA nickel-hydrogen batteries, but the capacity is limited, so the usage time won't be very long.