Hello guys. I was wondering what you think about the instant battery jump starter that plugs right into the cigar. lighter area? Do they really work? I've seen those a lot and they claim they will jump start your car w/o having a second car hooked up to yours. Thank you for your replies.

This is my first time hearing of this.

Will it cross and give the whole system a shock?

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... Kerry

126 tailed by a 203, 129 leading the pack.

The trick of using the jumper thru the cigar lighters is to charge the dead battery first. Once the dead battery is charged to certain point via the cigar lighter; the dead battery now providing some current plus the current coming from a good battery, you should be able to start the car unless the dead battery is very dead and/or bad battery terminals. The jumper cable should have a current limiter so that burning the wire or fuse in both cars is not an issue. The problems I found are the poor contacts inside the cigar lighters and the time to charge the dead battery. It is much easier using a regular jumper cable with caution.

David