Macbook 'Battery Is Not Charging'

Hi, thanks for the reply. I got it from amazon but I made sure the reviews were good and it was compatible with my mac http://www.amazon.co.uk/gp/product/B008LO2LFE?psc=1&redirect=true&ref_=oh_aui_de tailpage_o00_s00

For some reason it won't let me copy and paste the info properly so I'll just type it....

Battery Information:

Model Information:

Serial Number: W03044RMFD3LC

Manufacturer: SMP

Device Name: bq20z451

Pack Lot Code: 0

PCB Lot Code: 0

Firmware Version: 201

Hardware Revision: 000a

Cell Revision: 165

Charge Information:

Charge Remaining (mAh): 4194

Fully Charged: No

Charging: No

Full Charge Capacity (mAh): 5858

Health Information:

Cycle Count: 0

Condition: Normal

Battery Installed: Yes

Amperage (mA): 0

Voltage (mV): 11760

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

AutoPowerOff Delay: 14400

AutoPowerOff Enabled: 1

Current Power Source: Yes

Display Sleep Uses Dim: Yes

PrioritizeNetworkReachabilityOverSleep: 0

Standby Delay: 4200

Standby Enabled: 0

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

AutoPowerOffDelay: 14400

AutoPowerOff Enabled: 1

Display Sleep Uses Dim: Yes

Reduce Brightness: Yes

Standby Delay: 4200

Standby Enabled: 0

Hardware Configuration:

UPS Installed: No

AC Charger Information:

Connected: Yes

ID: 0x0000

Revision: 0x0000

Family: 0x0000

Serial Number: 0x00000000

Charging: No

I tried to do the Hardware Test but the power on button on my mac doesn't work. The only way my computer will start up atm is by disconnecting and reconnecting the battery and then when I plug the charger in it automatically turns itself on. It's really strange.

I did take it to the apple store near me and they said it would cost £100 for them just to do a check on it and then it would cost money on top of that to replace anything that is damaged but if it's going to come to like £200+ I'm tempted just to buy a new laptop. Not sure what to do really.