Spilt drink, battery problem

I spilt a drink of iced tea and whiskey over my macbook air keyboard, gutted i know the problem with drinking!

Anyway it turned off instantly and would not turn back on for around 3 days, i left it to dry for around a week, plugged it in and turned it on, it booted and got to the login screen but the keys being typed were not the correct ones so i turned it off and left it for two more days.

Turned it on now plugged in and now it seems to be working fine keys are fine, everything running smooth, except it will only work on the charger which at first had the green light and now has changed to the orange light.

Im planning to open it up on tuesday and clean out the inside with QD cleaner, but my problem is do i buy a replacement battery, or is it another problem maybe the connector?

Here is the info from cococnut battery

Current Charge 0mAH

Max Charge 0mAh

-9.2233372e+18%

Current Capacity 0 mAh

Design Capacity 4680 mAh

0%

Mac model Macbook Air 5.1

Age 12 Months

Battery load cycles 96

Battery Temp 30.8 c

Battery power usage 0.0 watt

Any help would be appreciated.