Chosen Solution
The battery for my old MacBook Pro 3,1, 15", A1226 does not charge. I use the 85W L-type charger. Is there a difference between the megsafe T or L type for it? I only can use it connected with the megsafe, it always lights up green. Profiler says the battery has only about 140 cycles, but wont charge. I already cleaned the connections etc.
Here’s a good reference: Apple Portables: Troubleshooting MagSafe adapters and see if this is your problem: Portables: L-shaped MagSafe power adapter does not charge computer and LED indicator light does not illuminate
The Apple info page shows that only the T-shape is right for the late 2007 A1226 model I guess..