Hello My name is Roger (1st post ever on this forum) I have a 11.6 inch Acer Aspire One (Model # 1410-2990) I am looking for a replacement battery for my netbook. I am looking for a battery that lasts 6 hours or more between charges. Acer of America said it must be a 6 cell. I looked for batteries on line but it is confusing. What does the mah # like 4400 or 6600 mean or the wh #? is a higher mah number mean the battery will last longer, like maybe 6 hours???? Has any one replaced there battery what did you get and how long will your computer run between charging???? THANK YOU!!!! Roger