Where would you start? What steps would you take?

Bought 2 new Duracell wet-cell batteries in July for TM. One of them won’t hold a charge? Take them to auto zone and get tested? Where to start? Advice? Thanks!

From sam's club? Take em back and get a new one if it's a bad battery

I would also make sure your charger is working. That may be what killed your battery.

I would test it w my load tester. But since you mention taking some place you must not have one.

I’d jumper cable them together and charge. Then check w load tester.

1. Take it back, it's under warranty.
2. Also, What are you charging the batteries with? As in what does your charger say it can charge?
Found out years ago AGM batteries need a different charger than your standard lead acid batteries. But normally it's the charger that goes bad.

Noco Genius 3-bank