Qantas, Jetstar, Virgin Australia, Tiger Airways ban Samsung

[Mr. Man-wai Chang]

Full story:
<http://www.smh.com.au/business/innovation/qantas-jetstar-virgin-australia-tiger-airways-ban-samsungs-galaxy-note-7-use-charging-on-flights-20160909-grcjii.html>

Qantas, Jetstar, Virgin Australia and Tiger Airways have banned
passengers from using or charging Samsung Galaxy Note 7 smartphones on
planes over concerns their batteries could explode or catch fire.

The airlines have introduced the ban following Samsung's recall of its
Galaxy Note 7 smartphones, which was launched in August.

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Actually, batteries don't just blow up when charging, some blow up when discharging. Whichever way the current is going apparently it overheats something and POOF. There have been people injured while talking on a cellphone because of this.

This technology has come a long way. In the old days they would make you shut the phone completely off when you got on, or even went into a hospital. They said it might interfere with their equipment. Well they seem to have that part worked out but in hospitals they still tell you to turn it off because the building is a battery killer, causing rapid discharge.

This is because your phone is polling for a tower and the building is an effective RF insulator at those frequencies. It will keep searching and searching and increasing its transmit power until the batter dies. And that is discharging it and if you got an elcheapo eBay $4 battery in it it might just blow up.

Now phones have an airplane mode. Not so sure how that works because cell towers point the signal down, the plane must have a repeater or whatever and act as a tower. But they've had airphones for a long time, you just had to leave your credit card in the slot the whole time you talked. I am afraid to even look up what the rates were.

 

On Saturday, September 10, 2016 at 8:22:21 AM UTC-4, jurb...@gmail.com wrote:

Actually, batteries don't just blow up when charging, some blow up when discharging. Whichever way the current is going apparently it overheats something and POOF. There have been people injured while talking on a cellphone because of this.

This technology has come a long way. In the old days they would make you shut the phone completely off when you got on, or even went into a hospital.. They said it might interfere with their equipment. Well they seem to have that part worked out but in hospitals they still tell you to turn it off because the building is a battery killer, causing rapid discharge.

This is because your phone is polling for a tower and the building is an effective RF insulator at those frequencies. It will keep searching and searching and increasing its transmit power until the batter dies. And that is discharging it and if you got an elcheapo eBay $4 battery in it it might just blow up.

Now phones have an airplane mode. Not so sure how that works because cell towers point the signal down, the plane must have a repeater or whatever and act as a tower. But they've had airphones for a long time, you just had to leave your credit card in the slot the whole time you talked. I am afraid to even look up what the rates were.

According to my brother, "airplane" mode turns off the cell transmitter in the phone and allows it to just be used as a multi-media player or any game or app.

YMMV

 

[Ralph Mowery]

In article <bd28542a-cff0-4ae0-a4c3-d6b06a99eb7e@googlegroups.com>,
jurb6006@gmail.com says...

. It will keep searching and searching and increasing its transmit

power until the batter dies. And that is discharging it and if you got
an elcheapo eBay $4 battery in it it might just blow up.

Now phones have an airplane mode. Not so sure how that works because cell towers point the signal down, the plane must have a repeater or whatever and act as a tower. But they've had airphones for a long time, you just had to leave your credit card in the slot the whole time you talked. I am afraid to even look up what the rates were.

The airplane mode is for the smart phones and tablets. It mainly shuts
off the telephone, blue tooth and wifi. That is done because usually
there are no devices to connect to. This saves the battery as you
mentioned.

Basically just a quick way to disable the radio frequency functions to
save the battery.