I have just purchased a new battery for my 2011 R/T dodge and it is still going flat. the mechanics checked the battery there is nothing wrong. Dodge dealer reckons it needs a diagnostic check because the engine light keeps coming back on after it goes flat. Do you guys have a solution to this problem please?

 

I'd let the dealer do a diagnostic check.

 

Get the scan.Many suspect items, alternator voltage reg(in the computer) or drain from a toy dealer installed.