Macbook Pro Battery won't charge - help please

Hi Guys
We have two MBP - one the previous model with the removable battery. I repaced the battery a little under two years ago on this one and it doesn't get heavy use, but now it's not taking any charge at all. Here's what I get from the system info....
Battery Information:
Model Information:
Manufacturer:          SMP
Device Name:          ASMB012
Pack Lot Code:          2
PCB Lot Code:          0
Firmware Version:          110
Hardware Revision:          500
Cell Revision:          200
Charge Information:
Charge Remaining (mAh):          0
Fully Charged:          No
Charging:          No
Full Charge Capacity (mAh):          0
Health Information:
Cycle Count:          154
Condition:          Replace Now
Battery Installed:          Yes
Amperage (mA):          0
Voltage (mV):          4628
As you can see, not many cycles so I'm confused as to why it's dead. I've done the SMC reset and I know the charger works as it's charging our other MBP (with internal battery). Anybody got any smart ideas what may be wrong and wehther it's fixable without laying out £100 on a new battery.
Many thanks
Phil

Phil,
All batteries fail at some point, whether in an automobile, flashlight, computer or anything else. The ratings on longevity are statistical norms, not specific guarantees for an individual battery. Lithium-Ion batteries of the type Apple uses, particularly the SMP products, have a typical life of 1,000 cycles. An individual battery may fail earlier, or later. Factors affecting the life may include temperature exposure and charge cycle treatment, such as frequent deep discharge of the battery.
Your battery may very well have failed cells judging from the voltage and current information. That cannot be repaired any way but by replacement of the entire battery.
If a new battery does not seem to be acting right, you might want to consider having the charging circuitry tested to make sure there is not a fault with that.
At this point the only real option is to replace the battery.

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Manufacturer:          SMP
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Voltage (mV):          11638
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System Sleep Timer (Minutes):          0
Disk Sleep Timer (Minutes):          0
Display Sleep Timer (Minutes):          5
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
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System Sleep Timer (Minutes):          0
Disk Sleep Timer (Minutes):          0
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Wake on Clamshell Open:          Yes
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