Survival and technology

I know that is case at the moment.but from the post(hank) I read above they poster hinted that apples new os will be far more cloud oriented.
the "cloud" is marketing ploy that leaves users at the mercy of their online content provider.
IF apple is going all cloud in the new os that is something I will avoid like the plague. And I say if.
I don't know enough yet.

But no one has said yet if you can install anything to an ipad if that its all you have. No Itunes no account on the apple market. no desktop.just an Ipad and a install file if you can get one.(can you down load install files onto an ipad and add the new app that way)
No market no itunes no desktop just a web browser or a ftp client our sd card with a install file for a app.

 

I thought watts was volts/amps or was it there other way around?
Volts matter because
110 is not that easy to find other than coming out of your wall. And far as I know there is no 110 volt battery. At least not one you can carry.
Amp matter because you're battery its rated in amp hours.how many amps per hour you get at its rated voltage.

I expect I know what volts and amps i have to work with.watts will change depending on what the machine is doing so I can't plan for that.other than plan to support the maximum current draw.

At least that its how I see it.

 

OK...first let's get everyone on the same page...or, at least in the same book.

Back when I learned my very limited knowledge of electricity, I am pretty sure watts was volts X amps...I really hope that hasn't changed somehow.

Also amp hours, I am pretty sure means the overall capacity of the battery...not how many amps per hour it will handle, but how many amps the draw would be to take the battery to need charging in one hour. 20 amps for 5 hours would be 100 amp hours...so would 50 amps for 2 hours.

If you have batteries with a total amp hour rating of 500 (just to pull a number from the air), they are 24 volt batteries and your power requirement is 500 watts you will draw just under 21 amps and can operate for about 24 hours without a charge.

Obviously, if you have a 10 amp charge coming in, you would only be drawing a net 11 amps and the batteries would supplement for more like 45 hours.

That 100 watt, 6v flashlight that melbo mentioned would draw 16.67 amps, so a battery rated at 60 amp hours @ 6 volts would power it for about 3 2/3 hours...

This is just how it was explained to me when we put in our backup system many years ago...I may be completely off base or overly complicating it, in which case I am sure it will motivate BT or Melbo to point out exactly what is correct.

 

I don't see anything wrong with what you have said.I'm am only vaguely acquainted with electrical theroy.
I know the voltages required.i can find out the max amp draw for the voltages.i know my power supply is 500 watts max as it sits in my computer now. That is all I know.
I don't know how many watts the computer draws at any one time.i don't need to know.just the max watts matter to ensure the dc2dc converters have a high enough amp rating.
If I was powering a simple light bulb then it would be easier as light bulbs don't have a fluctuating power requirement.
that's all I know.and even that could be wrong.which is why I ask questions.