there has been many many threads on the portable. 

But in a nutshell you need: 

1. a good battery. it isnt trusted to run well, or at all without one. 

2. it needs a FULL clean up and recap. this is REQUIRED as well. All portables are leaking, and 60% of them have damaged the motherboards where trace repairs are needed. 

3. the 1.5A adapter needs recapped by now as well. 

From your post, it appears the battery has been rebuilt. So you qualify as #1 checked. 

but you still need 2 and 3.