Sudden Battery Death

[Dennis H]

OK, will the factory alarm system that makes the red light flash on the dash in perpetuity make the light activate? Also, started the Coronet after a 2 week layup due to monsoon rain. Lit right up. Battery cut off does its job on the old cars.

 

[Dennis H]

S

2006 Charger. 47,000 miles. 3rd battery. 6 months old. Car sets for 8 days, dead as a doornail. Not the first time. Trickle charge. With regular use and not extended dormant storage car starts fine, fast, and without hesitation. Don't know how to find a parasitic drain if there is one. How about those newer power-grid batteries? That battery holdown is a pia. And heavy. Between the strap, the cables, and the subfloor is sets below in the trunk - it is not going back in. If the accident is that bad, we won't survive anyway.

Shop says it is in the radio head. Pull the fuse and it drops from 3.5 to .03. Something in the unit stays on, uconnect, navigation, Sat radio...

 

[oldbee]

Well, the newer cars all have a parasitic drain from the computers. OLD cars like ours should not, except, the dreaded diodes in the alternator OR the add-on radios with a memory in them.