Iphone charges on a car battery

NormanPorkinson · 25 Mar 2011 at 22:20

Bit of a random question, but how many charges do you think a standard car battery can provide an iPhone with without it draining the car battery so that the car won't start?

I intend to use the cigarette lighter in-car charger to charge my iphone and I won't be turning the engine on as the car will be static. I go carp fishing and spend time (upto a week) on the bankside with no electricity, but with my car just behind me. I know that you could get a lot if the engine was running but obviously it won't be as I won't be going anywhere.

I have no knowledge about such things and was hoping that an engineer, car mechanic or other suitably qualified person could help.

thanks

NormanPorkinson · 25 Mar 2011 at 22:34

Impy77 said:
A week fishing? really?

Not normally, usually 24-48hrs, but I intend to do at least one 7 day session this year.

NormanPorkinson · 25 Mar 2011 at 22:50

bobbydigital said:
Or you could get one of the portable jump start kits. Handy to have in the car and normally come with:

jump leads
air compressor
12v

Haha - This is what im trying to avoid but will bare it in mind

NormanPorkinson · 26 Mar 2011 at 05:51

Bennie-Mac said:
A fully charged 200 amp-hour battery will, in theory, deliver 20 amps for 10 hours or 2 amps for 100 hours. The charger draws 0.3 amps, so the battery will run the charger for a maximum of 666 hours ((20/0.3) amps * 10 hours). Due to inefficiencies in batteries, the actual time will be about 2/3 of this: 444 hours.

This is all my own information and is in no way copied from ehow.com

This is what I was looking for. Thank you!

Thanks to everyone else too, most helpful