I have bought a new replacement battery for my acer ASPIRE 5738G laptop. After full charge (100%), the battery was removed from the laptop and shutdown the system for about 10 hours. I tried to restart the laptop by inserting the battery in and without connecting the charger cable. The laptop is not starting, then I connected the charger cable for few seconds and now it has started. After booting, system continues to work until battery is fully discharged even after disconnecting the charger cable after restarted. My question is why the system does not start on battery even the battery has fully charged to 100% and lasts after 1 hr & 35 min after booting. And I want to know whether a new battery's capacity is only One hour and thirty five minutes while simply Windows 7 Ultimate only was running.