Hello. I recently ordered this refurbished MBP off of the Apple website: 15.4-inch LED-backlit glossy widescreen display 2GB memory 2.4GHz Intel Core 2 Duo NVIDIA GeForce 9600M GT graphics processor; and NVIDIA GeForce 9400M graphics processor with 256MB of DDR3 SDRAM shared with main memory 250GB hard drive 8x SuperDrive (DVD±R DL/DVD±RW/CD-RW) Built-in iSight camera Illuminated keyboard I thought I got a good deal ($1299) but now that I think about it, I'm kind of upset that it does not have the built in battery. I wanted to ask about how many hours this MBP will last and if it was significantly less than the new MBPs with the built in battery. I don't use any graphic-intensive programs but I'd still like a long-lasting battery. I'm thinking about returning this one once I receive it and purchase the refurbished 2.53GHz Intel Core 2 Duo 13" with 4GB memory and the built in battery instead. Thank you for your help.