I have an Asus n43jf laptop running Windows 7 64-bit. The laptop is a little over a year old.
Up until very recently, when the battery would run low, I received a low battery notification, and if I continued without plugging in, I received a second "running on reserve power" notification. Finally, if I still didn't plug in, the laptop would hibernate. However, now I don't receive any notifications, and the laptop doesn't hibernate. When the battery gets low (just above 10%) the laptop will suddenly hard shut down. It acts as if the battery completely died, well before reaching 0%, and before reaching any of the Low/Reserve/Critical battery levels.
What can I do to ensure that my laptop powers down more gracefully when running out of battery life, and make sure the % battery life remaining is accurate?