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[bobterry99]

Originally Posted by lynns

I would like to here from the R129 electronics guru "bobterry99" with regard to the Battery Tender products such as Batterytender.com - Home of All Your Charging Needs Battery Tender Jr.

I think this product will work perfectly well for keeping a battery fully charged. However, I imagine your owner manual states that you should only connect a charging device with the battery disconnected from the car.

By the way, I have jumped R129s many times without consequence. Maybe it is key that you connect the cable to the negatives last and disconnect it first or that you have both cars off when making connections.