DETROIT – Temperatures are expected to hover in the teens and single digits throughout this week in Michigan, with wind chills dipping into the negatives. AAA is issuing its own statewide Arctic air advisory and offering the following tips for drivers to help keep their vehicles ready for travel in the cold temps:Battery – Have charging system tested to ensure it’s fully charged and in good condition. Engine Coolant – Use one that provides anti-freeze protection down to the lowest temperatures you are likely to encounter; -30oF/-34oC is a good guideline. If you don’t have access to a garage, put a tarp over the hood or park in a wind-protected area. Here’s what you should do to prepare for a dead battery:Always travel with a cell phone and car charger.