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has anyone had this happen i have had it happen on both my cars now. i connect positive directly to cell from battery and switch the earth thru a relay. if i park my car up for more than a day or two my battery is so low on charge it wont start the car it yet it never goes completely flat. i started disconnecting the positive from cell when parking up and presto problem gone. i'm interested to see see if this is common. i've gone away from brute force cell setups now to pulsed alternator driven. if this is a common thing bringing it up now could save anyone new the hassle of constant flat batterys by simply using 2 relays to completly isolate the cell. just thought i'd share that......