[redgeminipa]

k88dad, on 20 April 2012 - 10:34 AM, said:

mhawks, on 20 April 2012 - 07:01 AM, said:

ErichLippert, on 20 April 2012 - 06:24 AM, said:

This reminds me of a similar fix for non-working USB ports on a computer.

It seems like USB 2.0 hubs have a sort of circuit breaker functionality where if you plug a shorted device into one of the ports, the entire hub shuts down until power is removed from it completely. We had an intermittently shorting digital camera USB cable around here at work that was doing this to Macs and PC's.

You have to shut the machine down completely and unplug it's power supply, on a laptop this means removing the battery as well; a simple reboot will not fix it.

I guess with my MacBook Pro (non removable battery) I would be sol.

Two possibilities, neither of which are strictly recommended in everyday practice...

1. Let the battery drain to zero before recharging (inconvenient, and shortens battery life)
2. Reset the SMC (the last-resort option for correcting similar issues)

Info on resetting the SMC...

http://support.apple...US&locale=en_US

1. Shortens battery life? The last I heard, Apple recommends doing this once a month to calibrate the battery. It's supposed to help maintain the battery.

[k88dad]

redgeminipa, on 21 April 2012 - 03:07 AM, said:

k88dad, on 20 April 2012 - 10:34 AM, said:

...
1. Let the battery drain to zero before recharging (inconvenient, and shortens battery life)
2. Reset the SMC (the last-resort option for correcting similar issues)

Info on resetting the SMC...

http://support.apple...US&locale=en_US

1. Shortens battery life? The last I heard, Apple recommends doing this once a month to calibrate the battery. It's supposed to help maintain the battery.

That is a common misinterpretation of Apple's recommendation. Apple recommends that you go through at least one complete charge cycle per month. A charge cycle is the equivalent of going from completely charged to completely drained (and recharging to completely charged). This could be (and likely would be) accomplished by a combination of using and charging the device multiple times--without necessarily fully draining the device.

I can see where the confusion comes from. Apple both makes the recommendation and defines a charge cycle in the same sentence. It is poorly worded.

The modern batteries found in current Apple devices do not need to be completely drained. What they are really saying is that the best way to maintain these batteries is to use the device on a regular basis. Don't let it sit idle for months.

The verbatim text: "Use your [device] regularly. For proper reporting of the battery's state of charge, be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down)."

An explanation of a charge cycle and the differences in modern batteries, from Apple:

http://www.apple.com/batteries/

This post has been edited by k88dad: 21 April 2012 - 07:48 AM

[NCSilverBear]

Useful suggestion that's been around for about as long as the iPhone itself. Fixes a lot of woes, simply and expertly.

[RobertBixler]

Thanks. We had some rain today, and apparently a drop or two of rain must of gotten in the phone because that's when it stopped charging. It's only been about a half hour now, but your fix looks like it worked. I now have a charging phone.

I'm kind of scared to disconnect it from the charger now, until it is fully charged.

One small note to add though is that, for the moment, my computer is reading the phone as a USB 1.0 instead of a USB 2.0. I can live with that for now, but that is what I am showing right now.

[JenniferMeredithWalne]

And what do you do if the phones run out of charge and it wont turn on coz theres no battery life left and it wont charge?

[Gelsin]

had exactly the same problem (only with no known liquid cause), and exactly the same fix worked perfectly, thanks for the tip

[Gelsin]

had exactly the same problem (only with no known liquid cause), and exactly the same fix worked perfectly, thanks for the tip

[stephenreichard]

As I was looking this up, I powered mine off, turned it back on and voila. Then I read the story. I think my version of the fix is shorter, more to the point.