Macbook battery life

Question

Hi all, I recently installed mountain lion, and since then my macbookair runs out of battery within 2 hours or so. even when the mac is folded and just lays on the table, it is dead within a couple hours. Can anybody please assist me with some advice? tnx Battery Information:  Model Information:  Serial Number:          W0002635M6EWA  Manufacturer:          SMP  Device Name:          bq20z951  Pack Lot Code:          0  PCB Lot Code:          0  Firmware Version:          002a  Hardware Revision:          1  Cell Revision:          100  Charge Information:  Charge Remaining (mAh):          60  Fully Charged:          No  Charging:          Yes  Full Charge Capacity (mAh):          341  Health Information:  Cycle Count:          362  Condition:          Service Battery  Battery Installed:          Yes  Amperage (mA):          1448  Voltage (mV):          8358System Power Settings:  AC Power:  System Sleep Timer (Minutes):          0  Disk Sleep Timer (Minutes):          10  Display Sleep Timer (Minutes):          15  Wake on AC Change:          No  Wake on Clamshell Open:          Yes  Wake on LAN:          Yes  Current Power Source:          Yes  Display Sleep Uses Dim:          Yes  PrioritizeNetworkReachabilityOverSleep:          0  Battery Power:  System Sleep Timer (Minutes):          10  Disk Sleep Timer (Minutes):          10  Display Sleep Timer (Minutes):          3  Wake on AC Change:          No  Wake on Clamshell Open:          Yes  Display Sleep Uses Dim:          Yes  Reduce Brightness:          YesHardware Configuration:  UPS Installed:          NoAC Charger Information:  Connected:          Yes  ID:          0x0100  Wattage (W):          45  Revision:          0x0000  Family:          0x00ba  Serial Number:          0x001ff8f6  Charging:          Yes

mende1 · Accepted Answer

Mac OS X is telling you to replace the battery. First, reset the SMC &gt; http://support.apple.com/kb/HT3964If it doesn&#x27;t work, take the MacBook Air to an Apple Store or reseller to get a different battery. That upgrade has nothing to do with the battery issue

Ralph Landry1 · Answer

The battery issue was probably just a coincidence with the ML installation.  That information says your battery needs to be serviced, the capacity of the battery is very, very low.  Should be more like 4,000 mAh than 341 mAh.You can try running the battery down to shutoff, do not force it to restart, then plug it in and recharge fully.  See what the battery info looks like then, if it comes back at all.More than likely you need to take the MBA to an Apple store genius bar and have the techs test the system.  If you have an external hard drive, be sure to backup the system first.