Sgt Siff Posted May 13, 2007 Report Share Posted May 13, 2007 Hello!I was wondering if someone could clarify something for me?For example lets say i have a 12v battery that is rated at 100AHDoes this mean the battery will supply 100 amps for one hour?or for example 1 amp for a hundred hours?Even if something as small as a model motor was connected to this supply, would it draw the current and voltage it needed or would it overload and burn out the motor?Thanks in advance,Sgt Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 13, 2007 Report Share Posted May 13, 2007 Hi Sgt Siff,Welcome to our forum. ;DA 12V 100Ah battery is a pretty big car battery.100A for 1 hour would probably cause its electolyte to boil then it would become dry.It can provide 100A or 200A for a few seconds to start a car's engine.It would provide 20A for 5 hours.An electric motor draws as much current as it needs. If it draws 1A from series-connected AA battery cells that total 12V then it will draw only 1A from your big 12V car battery.An electric motor draws much more current when it works hard, when it is stalled or when it starts running. Quote Link to comment Share on other sites More sharing options...
Sgt Siff Posted May 13, 2007 Author Report Share Posted May 13, 2007 Ah, so it would supply the full 100A for the starter motor until the engine gets going.Reason is i have a car horn which uses a motor air compressor, i know it is 12v but wasn't sure about the current ratingThanks a lot :) Quote Link to comment Share on other sites More sharing options...
indulis Posted May 14, 2007 Report Share Posted May 14, 2007 Check out http://www.amplepower.com/pwrnews/beer/ Quote Link to comment Share on other sites More sharing options...
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