I currently have the smallest battery on my 8.9" A1 and it's indicator is just flashing orange. I need a new one. I see on Ebay all kinds from 3,6,9 to even 12 cell batteries with 2200mA hr to 10,000mA ratings. How many hours of use do these differnt batteries provide? How much extra do they weigh, and how much more space do they take up? The original battery was good for 2-3 hours and I don't really need more time at this point but the 6 and 9 cell batteries are not much more money than the 3 cell ones which start around delivered with a 3 year warranty whatever thats worth.