Currently I have one TNT bottle heater that plugs into the cig lighter. I am installing a second bottle along with a second bottle heater. Would it be safe to hook the two heaters together in parallel and use the cig lighter? TIA.

 

Look in your owners manual and find out what fuse the cig lighter is on. Then...do a little research and find out what the heaters draw. If the heaters do not draw more than the fuse is rated for its ok to run two. However...i bet the fuse is not rated that high. Under certain circumstances I believe you will need 20 amps+ to run two heaters. I doubt the fuse for the cig lighter is that high.