Last night around 3am i started my car just fine! The next day a friend of mine could not start her car, i took my battery out to switch it with hers to bring her car back to the house. Now when i tried to put my battery back into my car, my car wont start! no cranking noise or anything. i tried push starting it, and still. could it be my starter? it was starting perfectly up until this incident.. so it doesn't make sense to me. Any ideas on what it could be?

 

Charge the battery and then go from there.

 

Jump start it.

 

Make sure your terminals and cables are clean and tight.

 

this is your best bet