12v Emergency backup battery in Parallel?

[dradam]

I have tried that route. They say they no longer make that battery and also don’t have a replacement.

Thank you Aron

SMDH -- hoping someone is giving you bad intel or witholding important info. Looks like I may have to upgrade vehicle like my iphone.

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[Hebdog]

Thank you Aron

SMDH -- hoping someone is giving you bad intel or witholding important info. Looks like I may have to upgrade vehicle like my iphone.

I would like to hope. If we can just find that battery that works in an auto parts store, that would be glorious.