Sony says goodnight to PSP Extended Life Battery Kit

Sony, where's the justice? How could you mercilessly kill the nine month old PSP Extended Life Battery Kit -- capable of boosting the PSP's play time by up to 80% -- while UMDs continue to be the preferred method of distribution for the system's games and video content (thereby also heavily contributing to the device's juice-drain)? Worse still for Sony, why are we not surprised?