My 2006 Honda Civic won't start. I noticed it straining to start and I figured it was going to need a new battery. I tried to jump start, but that didn't help. Bought a new battery, and it sounds the same as it did with the old batter. Old battery, jump start and new battery all sounds essentially the same, like a dead battery (minus the clicking sound). It almost sounds like it's unable to overcome some compression or something.
I tested the terminals and got 12v and I also tested the cables and got 12v off the battery. So, I don't think it's a bad connection.
Any ideas how to diagnose the issue?
Edit: Link to video. Battery seemed to be almost 100% dead and I only got one last bit of sound out of the starter as I made the video. when the battery was stronger, it was a similar sound but just longer and louder.
I'm gonna tow it to a mechanic tomorrow
Update: I had the car towed to dealer. It was a failed starter. They are replacing the entire unit. Thanks for the help.