Battery overcharged?

[Bad Karma]

So I have a red top Optima and my car rarely gets driven. So I put her on 2 amp charge for the last 4 days. Go to drive her today. Had to put on "start assist" mode on the charger to get her going.

Went down to put some gas in her and she wouldn't restart.

Got a jump, on my way.

As I drove her home, I notice that I have good power (around 12-16 volts) according to the gauge. Get home, park her in the garage.

Try to restart. Nada.

Is it possible that I killed the battery by charging it that long?

Gonna go out, start her and disconnect battery to eliminate the alternater....at least for peace of mind.

Suggestions??

Thanks,
Ivan