DIY Cost: $ 65-$130 Est. Time: 20 - 40 mins Difficulty: Easy Summary Step-by-step procedure on how to clean and replace the battery on a Honda Fit, model years 2007-2012. What you will need 10mm Wrench Car Battery Group size: 151R Cold Cranking Amps: 370A min Battery Corrosion Brush Procedure Open the hood. Pull the hood release under the dashboard and go to the front; then unlock the hood latch and pull the hood up. Locate the battery on the driver's side of the engine compartment. Disconnect the negative terminal by loosening the 10mm bolt and pulling the battery terminal out from the battery post. Disconnect the positive terminal by loosening the 10mm bolt and pulling the battery terminal out from the battery post. Remove the battery bracket in order to pull the battery out from the vehicle. Clean the battery terminals using a battery corrosion brush. Get the new battery or clean the battery post using the battery corrosion brush and recharge the battery. Place the battery back on the battery tray and reinstall the bracket. Connect the positive terminal back to the battery and tighten the 10mm bolt. Connect the negative terminal back to the battery and tighten the 10mm bolt.