Macbook slow on battery after water spillage

Few months ago I spilled water on my macbook. I turned it off instantly and put it in rice, fortunately it's now working.
The only problem is that when I use it on battery, it is very slow. Even the mouse pointer is lagging when I am moving it. When I used it on batterry, it discharged normally, and when I plug the power cable the batterry gets charged.
When I start it in safe mode, it work well on battery.
I was thinking that a component might have been damaged when water was spilled,  a component that is not used while on safe mode.
Do you have any idea of what the problem could be?
Thank you for your help

You have to take the computer to the Apple store to have it checked out.
Genius Bar reservation
http://www.apple.com/retail/geniusbar/
Best.

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