WirthCo 20309 Battery Knob Switch with Bypass for Top Post Battery

Would have given it 5 stars except the clamp for attaching to the existing battery cable was a little too big. It wouldn't hold my cable very good. You'd think this would be some standard size across the industry but maybe not. I had to put the clamp in a vice and shrink it a bit to make it hold tight. Also, I had to work with the thing a bit to get everything to fit but nothing unusual for working on after market car parts. Good price too.

I purchased this product for my fleet of vehicles. I work over seas and am not home nine to ten months out of the year. I wanted to stop any discharging and just have my battery solar maintainer do the charging on each vehicle. Product works great but the terminal size is very small. I have Mercedes, Volkswagen , GM, Jeep and I had to stretch the terminal opening to fit over the battery post. Make sure you measure the battery post OD outside dimension. Other than that product works great.

Thanks amazon!

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We have two homes (DE and CA) and leave cars each place for about 6 months. This gadget makes it very quick and easy to disconnect the batteries when we leave and to reconnect them when we return.

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Exactly what it says it is: Nothing more, nothing less. The build quality is high, the bypass fuse weather resistant if not weather proof. All in all, a quality job all around.

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