The figures quoted by SCE rely on playing with headphones, without using the wireless multiplayer capabilities of the device, and with screen brightness set in a specific range - leading to widespread speculation that using the full power of the system will bring the battery life down closer to the originally rumoured two hour level.
He cited the Sony Walkman as an example of battery technology progress, pointing out that the device had started off with an exceptionally short battery life. However, he stopped short of saying that the company plans to upgrade the battery technology in future revisions of the PSP, instead focusing on the possibility that developers will find ways to optimise their games to use the battery life more efficiently.
