For my Corvette, I took the cable off the battery and put an ammeter in series. I read the current after the Corvette "went to sleep".
Used a big 36 volt transformer off an ink jet printer with a diode, resistor, and LED in series, with clip leads to the battery. I chose the resistor for about 25 mA higher than the measured drain. The LED shows my charging current. Works. It can sit for over a month and starts as if you drove it yesterday. One morning I woke up to 5 inches of snow. Didn't have time to shovel the driveway, late for work. Thought I could make it to the street; the snow plow had cleared the road. I didn't even get half way down the driveway. The Corvette wedged the snow underneath until the wheels just spun freely. It took a while to dig the snow out from underneath and get it back into the garage. I took my wife's car to work. She could hardly stop laughing. Only 4 inches of clearance under my Corvette. Mike - AA8K Ken Arck wrote: > > > > Hi Mike > > In Corvette circles, battery tenders tend to be fairly common as many > Vette owners don't drive 'em at all during winter. As such there are > many good (and well tested) battery tenders out there. Here is one that > is recommended pretty frequently (and pretty cheap at $40) >
