The recently announced PSP2, codenamed Next Generation Portable, has a battery life of between four and five hours, Eurogamer has been told by a source.
Six to eight hours of life was Sony's original target, Eurogamer understands.
Sony announced the NGP this morning at a Tokyo press conference, but failed to discuss the device's battery life.
It did, however, reveal specifications.
The NGP boasts a ARM Cortex A9 (4 core) PU, a SGX543MP4+ GPU, a five inch (16:9), 960 x 544, 16 million colours OLED screen, and a multi touch pad on the back.
Then there's a Sixaxis motion sensing system, a three-axis electronic compass, and built-in GPS and Wi-Fi location service support.
As for wireless, expect 3G mobile network connectivity, Wi-Fi and Bluetooth support.
The NGP's four to five hour battery life is similar to that of the Nintendo 3DS. Depending on the level of brightness used and whether you're playing a 3DS-specific game, the Nintendo 3DS should last between three and five hours on a single charge.
NGP pricing is also yet to be revealed, but Eurogamer was told this morning that Sony will "make a loss".
Eurogamer's Oli Welsh is in Tokyo now and on the hunt for official, Sony-endorsed answers.