battery troubles

[lx mike]

well got the car home. my brother borrowed a good battery and stopped by at lunch and we got my car running and out of some lady parking spot! she left me a note.
tried the screwdriver in back and there was a magnetic pull. I just got home and tried the multimeter and here what i got for readings. car off no light on at all it read 12.7 volts. start car and just at idle nothing else on it was still at 12.7 volts, rev engne to 1500 and would go to 14.3 volts. engine running, lights on , radio on, at idle 12.6 volts and when i would rev to 1500 would go to 14.3 volts. i'm gonna charge up the old battery tonight and see if it hold a charge or not. did notice fluid seeping out from under the negative post when we was changing them out. I've had the car for 2 years with this battery and i imagine it must be 3-4 years old