HT202451: Using and maintaining your Apple MagSafe Adapter
Learn about Using and maintaining your Apple MagSafe Adapter
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Helpful answers
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Oct 27, 2015 3:56 PM in response to duanefrombreaby OGELTHORPE,A decent deep cycle 12v battery will weigh twice as much as the Honda generator. Small batteries (lead acid) will not last very long.
If you are contemplating lithium ion batteries, make certain your bank account is fat and that you have the correct monitoring/regulating hardware required for them.
Solar panels will require voltage regulators in the chain. Bright sun = more than 12 volts which might result in unintended consequences.
Ciao.
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Oct 27, 2015 4:10 PM in response to OGELTHORPEby duanefrombrea,Sending and receiving text from the radio side does not take much power and is quick.
I'm not sure what the draw is from a Mac Book Pro in sleep mode.
There are some pretty small 12V batteries out there but even the little ones are heavy.
Check out the link below. Anyway, my Go-bag has power supply and adaptors for all sorts of stuff.
I really appreciate you staying with this conversation.
http://www.powerwerx.com/batteries-chargers/sealed-lead-acid-absorbent-glass-mat -battery.html
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Oct 27, 2015 4:26 PM in response to duanefrombreaby OGELTHORPE,I am used to the 110 Ah batteries which weigh 72+ lbs. As you probably know, you can expect no more than 50% of the Ah rating for a battery before it needs to be recharged. Do the math and see what is the smallest that you anticipate will be needed. I have never measured the current drain for a MBP but a good amp meter will do the trick.
Ciao.
Addendum: Solar panels are not that light either, but there are flexible ones, but I suspect that the efficiency may be low on them.
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Oct 27, 2015 4:35 PM in response to duanefrombreaby Csound1,One question, how do you internet so that you can send/receive email?
Wouldn't an iPhone be a more efficient choice?
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Oct 27, 2015 4:41 PM in response to duanefrombreaby Tom Gewecke,PPerhaps an iPad ?
http://koomasi.com/pocketpacket/
PProbably more capable software is available for an android or Windows tablet.
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Oct 27, 2015 4:48 PM in response to Csound1by duanefrombrea,The iPhone only works if you have an internet connection or a connection to a cell tower. If you don't have access to those, the iPhone is a brick.
Radio on the other hand is a totally different animal.
It's a bit confusing to explain but for a brief tutorial, go to YouTube and check out Winlink.
You must have a ham radio license to use these options, but that is not so difficult.
Anyway, on looking at the power usage of the MacBookPro charger, it seems to be an energy hog.
It takes 60 Watts!
Am I missing something here or is Apple not being energy efficient?
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Oct 27, 2015 4:57 PM in response to duanefrombreaby Csound1,A 13" MBP draws 38 watts to charge a flat battery and 5 to 11 watts to keep it charged. Recharge takes around 2 hours and lasts 4 to 6. You'll be doing less things so maybe more.
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Oct 27, 2015 5:28 PM in response to duanefrombreaby Tom Gewecke,If you do consider a windows solution, I think the Surface does use 12V.