Use of battery tenders?

Asked by Richard Jul 17, 2022 at 04:56 PM about the 2009 Mercedes-Benz SL-Class SL 550

Question type: Maintenance & Repair

Does putting a battery tender on only the starter circuit battery also charge the
consumables battery?

1 Answer
26,715

taver91 answered 2 years ago

Probably not. The purpose of the starter battery is to provide enough power to crank the engine. Then the other battery will recharge as necessary to provide the functions that is supposed to.

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