Lenovo has these back instock, but looks like they're 6-cell this time.
From their site:
link: http://outlet.lenovo.com/laptops/2957xb3.html
Outlet Part Number 2957XB3
Condition Refurbished
Processor Intel Atom N270 (1.60 GHz, 512K L2, 533 MHz FSB)
Operating System Genuine Windows 7 Starter Edition - English
Keyboard/Pointing Device Industry Standard Touchpad
Total Memory 1GB PC2-5300 DDR2 667MHz SDRAM SODIMM Memory
Hard Drive 160GB, 5400RPM Serial ATA 2.5" Hard Dri