My 2011 Dodge Durango won't start it clicks and all lights flicker and wipers and it smells like egg

If it's original and leaking at all you need a new battery. It's also possible it's being overcharged by a bad alternator. You will need a load test on the battery and the alternator to be sure.If you don't work on your own car then use this link to find a good shop near you. https://repairpal.com/repair-shops Alex

There have many a seasoned technician fooled by the results of battery testing - simply because it is not performed properly nor completely!