E330 Shutdown without AC Adapter - Battery suddenly dead?

[janb]

Hi,

since wednesday morning my E330 won't turn on without plugged into the AC adapter and it immediately turns when I remove the adapter. The day before the battery worked fine and provided power for several hours. Now the battery percentage is stuck around 51,5% and slowly decreases in 0,1% steps. I already tried an 'static discharge' as mentioned in a lenovo-forum post i found. The laptop is one year old - bought in april 2013.
My operating system is Linux Mint 13. However I booted another linux operating system to test if the problem vanishes with a different operating system - it did not. The BIOS menu provides no battery calibration. For further information this is a terminal command output concerning the battery status:

upower -i

native-path: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
vendor: LGC
model: 45N1059
serial: 8511
power supply: yes
updated: Mi 14 Mai 2014 21:33:29 CEST (25 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: charging
energy: 24,79 Wh
energy-empty: 0 Wh
energy-full: 47,97 Wh
energy-full-design: 62,16 Wh
energy-rate: 0 W
voltage: 11,677 V
percentage: 51,6781%
capacity: 77,1718%
technology: lithium-ion

I hope somebody can help me here. Is the battery dead and I need to buy a new one, or might there be a problem with the BIOS?
Thanks in advance.

[Ford F-350 Man]

Based off of what that status report of your battery says, I would say it's a safe bet that your battery is probably defective. It says that your battery can't be charged to it's full capacity anymore. But based off of how much charge it has it should still be able to power the computer, even though it's only at 11.68 V. I would just get either a new 55+ (6 cell) or 55++ (9 cell) battery. You can find new OEM Lenovo batteries on eBay for way less then from Lenovo directly... Some people say aftermarket batteries are okay, but I prefer to stick with OEM batteries, especially when it comes to a computer.