Join Date: Feb 2000
Location: Menlo Park, CA, USA
Programs: UA 1MM 0P, AA, DL, *wood, Lifetime FPC Plat., IHG, HHD
Posts: 7,174
these are good, I had the smaller one for my macbook and macbook pro. It added about four hours, the bigger ones, i don't think ANY take you to 17 EXTRA hours, but 17 combinged with a new version mbp or mba might be true. They are $$$ though, I have NEVER found a deal, and would like to buy a mid range run, but sub 250$ range.