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If you have a car where the battery dies after leaving it, try plugging a solar charger on the dashboard into the cigarette lighter. This has kept me out of trouble for quite a while. Note that the cigarette lighter must be the type that is still connected when the ignition is off. Nick B


You need one of 2 things - volts or amps. To jump start the car, you need something with 12-14v and able to crank out 100+ amps. You can charge your battery with anything with a higher voltage. There is a video of someone charging his battery with a bunch of AA batteries in series. You have to let it sit for a bit. This is only going to work if you ...


No, you can't. A car battery needs a lot of amps at ~12v, and most USB outlets are rated between .5A and 2A at 5v. Car batteries run in the hundreds of amps at 12v. Water hoses often make a good analogy for electricity. Think of amps as the width of the hose, and volts as the speed that the water is flowing at. Your smartphone powerbank is a hose the size ...


There are no special safety issues related to snow and ice. In general, voltages up to 48V are considered safe for the human body. You can touch both contacts of a 12V battery, even with wet fingers. (Did you never touch the terminals of a 9V battery with your tongue? This hurts a little, but that's all) A 12V car battery can deliver several 100 Ampere, ...


As Paulster2 said, any bare metal should provide a good ground. Most common places to attach leads in your situation would be a lifting eye (if your engine has them), the body of the alternator is normally easy to attach to, or any metal part of the engine. Also make sure the metal you attach the lead to is capable of carrying enough current to start the ...


AS mentioned. It is a shared ground (all exposed metal is a ground. So connect to any none painted metal. Though they normally have a bolt or something to attach to near the battery.

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