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Old 12-24-2012, 01:11 PM   #1
negev
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Does leaving ssh running noticeably shorten battery life?

Greetings,

I've bought my first kindle today (a wifi Paperwhite) and have jailbroken it and installed the usbnet package so I can ssh into it. I'm not bothered about having the usbnet interface so I configured it to just run openssh over wifi only.

Will leaving this running affect the battery life in any noticeable way? I quite like being able to ssh into it over wifi whenever I want.

Also if anyone wants to share some cool hacks with me (or link me to a thread that lists them) it would be gratefully received.

Much love
neg
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Old 12-24-2012, 01:31 PM   #2
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Not sure if it does. I always leave my PW in airplane mode as to not even waste battery on the radio. For hacks and such you should visit the subforum Kindle Developer's Corner - that is also a better place to ask about any non-standard modifications to your Kindle.
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Old 12-24-2012, 02:12 PM   #3
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Quote:
Originally Posted by negev View Post
Will leaving this running affect the battery life in any noticeable way? I quite like being able to ssh into it over wifi whenever I want.
Yes and No.

You did read the user's manual, correct?
The battery life between charges is quoted **with wifi off**.

No quote as to battery life between charges is quoted **with wifi on**.
And note also, it tells you that the battery life between charges will be shortened in cases of a weak wifi signal.

- next -

Letting sshd run should not further decrease the battery life between charges than just having the wifi on.
sshd will block until it is needed.

- but on the other hand -

If by "battery life" you mean "battery useful life span" -
Then that is even harder to answer.

With Li-Ion it depends on how low you discharge it, how high you re-charge it, how often those cycles are made, and the price of tea in China.

Under the (only) conditions that Amazon quotes - the battery **might** last 2 years before it requires replacement.

Depending on the conditions listed above about your discharge - re-charge cycles - - very likely less than 2 years.

Translation: Buy the 2-year service contract now!
It includes one battery replacement during the 2-year period.
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Old 12-24-2012, 03:12 PM   #4
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On average:

couple of days - maybe a week - if you time to time unsuspend and hammer the wifi.

About a day if you hammer it, no suspending. fiddling about.

About 6 hours if you totally hammer the device.

So what knc said. Yes and No. If you let it.
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