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Thanks alot everone, got some great ideas there im leaning towards the MOSFET solution(great current capability, low voltage drop)

Thanks for the ideas, I like the idea behide the Mosfet polarity protect, only problems i see with it are the internal diode would shortcircut the whole thing but im sure theres a way to fix that The Relay option sounds pretty good exept id like to keep this relativly small, but maybe il find a...

Well basicly what im looking for is a way on protecting a circut from a reverse battery condition. I have considered several common solutions such as: -Diode (.7 Voltage drop for Silicon Diodes is to high,germanium voltage drop still not ideal) -Fuse (only works once) What i am looking for...