Deep cycle marine battery

[Pataforce8 10+ year member]

Would it be okay to install a deep cycle marine battery in conjunction with my current battery?

In a car period? By itself?

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[thegreatestpenn 5,000+ posts]

since the resting voltage will probably be different the batts will pull off each other when the car is off shortening their life. it won't be so bad if u drive the car everyday. Also they will have different discharge rates and that will effect how much juice actually reaches your system when it needs it. Won't work as well as a good agm battery but it'll do something

 

[Pataforce8 10+ year member]

Would it be better to replace my existing battery with a deep cycle?

 

[DukeNut 10+ year member]

Would it be better to replace my existing battery with a deep cycle?

No you don't want to do that. Deep cycle batteries are made for extreme discharge and then recharge, not for quick high bursts of power needed for engine cranking like your starting battery is made for. do as penn said above, use an agm.

 

[Pataforce8 10+ year member]

No you don't want to do that. Deep cycle batteries are made for extreme discharge and then recharge, not for quick high bursts of power needed for engine cranking like your starting battery is made for. do as penn said above, use an agm.

Alright thanks. I was only wondering because where I work I can get a discount on some deep cycle marines. But I'll just use an agm.