Hello all. I was over on Lenovo's forums, and no one could offer me any input on my situation. I have a Lenovo 3000 n100, and this new battery that I bought on ebay (5200mAh) discharges quickly (according to PC Wizard, it charges to the full 57720 mWh) . It last approximately 1 hour 30 mins (I'm being generous), if I am barely doing anything. I reduced brightness, reduced cpu voltage (0.95v), and disabled many devices (bluetooth, usb controller, etc.). I have calibrated this battery several times. Some things to note: It takes two presses of the power button to turn on the laptop when running on battery, and the battery sits at 0% for several minutes (up to 45 mins). Is this a defective battery? I am thinking that it is, because I have another laptop with a 4400mAh battery, with a little over half of its capacity left (2800mAh), and it holds a better charge than this one. I have a feeling that the seller that sold this to me isn't going to make it easy for me to exchange it. Any input is welcome!