I know this is a very common question but i couldn't find a solution in other threads. I have a Macbook Pro A1286 with the internal battery and about a month ago my little cousin spilled water on it. It stop working but i recently disassembled it, since it had no warranty after the spill, cleaned up the keyboard and the logic board and it started up. Everything works perfectly except from the battery. I doesn't work at all without the power cable on and the led light is always green. In the status bar there is a message saying (Not Charging) and the condition of the battery says Replace Now. In the system profiler i get this info: Battery Information: Model Information: Serial Number: W0942AZF977VC Manufacturer: SMP Device name: bq20z451 Pack Lot Code: 0000 PCB Lot Code: 0000 Firmware Version: 0003 Hardware Revision: 0003 Cell Revision: 0100 Charge Information: Charge remaining (mAh): 0 Fully charged: No Charging: No Full charge capacity (mAh): 0 Health Information: Cycle count: 117 Condition: Replace Now Battery Installed: Yes Amperage (mA): 0 Voltage (mV): 12264 System Power Settings: AC Power: System Sleep Timer (Minutes): 10 Disk Sleep Timer (Minutes): 10 Display Sleep Timer (Minutes): 10 Wake On AC Change: No Wake On Clamshell Open: Yes Wake On LAN: Yes Current Power Source: Yes Display Sleep Uses Dim: Yes GPUSwitch: 2 Battery Power: System Sleep Timer (Minutes): 10 Disk Sleep Timer (Minutes): 10 Display Sleep Timer (Minutes): 2 Wake On AC Change: No Wake On Clamshell Open: Yes Display Sleep Uses Dim: Yes GPUSwitch: 2 Reduce Brightness: Yes Hardware Configuration: UPS Installed: No AC Charger Information: Connected: Yes ID: 0x0100 Wattage (W): 85 Revision: 0x0000 Family: 0x00ba Serial Number: 0x009d85a4 Charging: No My question is... Is it just the battery and i only have to buy a new one? Is it the magsafe adaptor, the DC board or the logic board? I tried a lot of tricks but if you can help plz reply. Thanks a lot and sorry for the usual Thread.