It`s the OEM GM battery, off season I keep it plugged into a Schumacher charger, $18 from Walley World. The Jeep that was parked next to it had a dead battery in 3 years, no warning, just dead one day. I prefer the slow death.
I replaced the one in the Benz because it was starting to struggle in the cold and not keeping over 12.3v after parked overnight. Not the original battery, so I guess it lasted 4 years. Can`t complain as diesels are harder on batteries.
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