Forum Discussion

sprintstream's avatar
sprintstream
Explorer
Jun 28, 2020

Is it OK to mix battery types??

I have a new trailer along with its accompanying new 12v deep cycle battery. I also have a nearly new large 12v diesel starting battery just sitting in the garage. I would like to hook them up together to improve my available AmpHrs. Is there any problem to doing that I don't see? It irks me to have the diesel battery sitting there doing nothing. (yes, I know to hook them in parallel)
  • midnightsadie's avatar
    midnightsadie
    Explorer II
    Jun 28, 2020
    I don,t agree one battery could be weak ,it will draw the other down. you,ll get some input just wait, I,ve all ways been told mixing battery,s a no,no. sell that diesel battery and get two the same.
  • Lwiddis's avatar
    Lwiddis
    Explorer II
    Jun 28, 2020
    Starting batteries don’t do well with long, low amp hour discharges. Not built for that type of service.

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