Should You Install A Engine Block Heater?

1. My new battery goes dead in a few hours. Will my car catch fire? 2. My 2009 Kia Door Dash Car has low power. 3. My fuel gauge on my Tahoe move around a lot. 4. A shop broke my lug nut studs and the wheels are noisy now. 5. Should I buy a Engine Block Heater? 6. 2008 Toyota Tundra Air Injection Light On. 7. 2006 Dodge 3.4 Ton Abs and Brake Lights are on. 8. Impala Heater Motors and Brake Dust. 9. Battery Block Heater Remote Switches.