My battery keeps jumping down to 0% from around 30%.

My battery keeps jumping down to 0% from around 30%. It's done this about three times. I look at the battery life and it has about 30% left. Five minutes later my screen goes black. If I hit enter the screen comes back up but the battery is at 0% and I have to plug it in. Is my battery going bad? I have a MacBook (2009).

It sounds like the battery needs calibrating, and it's worth resetting the PRAM and SMC at the same time:
- Reset the PRAM: http://support.apple.com/kb/HT1379
- Reset the SMC: http://support.apple.com/kb/HT3964
- Calibrate the battery: http://support.apple.com/kb/HT1490
I have found that sometimes I have to perform the calibration sequence twice before the battery display gives sensible results, so don't panic if it doesn't work first time.
Bob

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Are you using push or fetch? If so, turn off push & adjust fetch or turn it off.

[Zen Micro] Keeps shutting down after unplugging from comput

I have owned this player for a year and three and a half months now. I had sent it in for repair before the warranty expired because I kept getting annoying feedback into my earphones. Unfortunately, they didn't fixed it and just sent it right back costing $25+S/H. I went on installing the firmware and loading my music up just fine, but when I unplug it from the computer, it shuts down. I tried several things such as reformatting the thing, but it didn't work and I hadn't checked out the sticky firmware thread so I just left the player alone very frustrated until now.
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Is there a sleep timer on the Micro? Did you check for that? (as opposed to Idle Shutdown)

Battery keeps running down

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Try:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.
If still problem, make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar
and
- See:
iPod touch: Hardware troubleshooting
- Try another cable. Some 5G iPods were shipped with Lightning cable that were either initially defective or failed after short use.
- Try another charging source
- Inspect the dock connector on the iPod for bent or missing contacts, foreign material, corroded contacts, broken, missing or cracked plastic.
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Apple Retail Store - Genius Bar

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Hey Thifobia,
I see that your iPad is unexpectedly powering off while you are using it. Here is an article for you that addresses this issue and has some troubleshooting suggestions:
If your iOS device restarts, displays the Apple logo, or powers off while you're using it - Apple Support
https://support.apple.com/en-gb/HT203899
Thanks for being a part of the Apple Support Communities!
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I bought my iPhone 5 the day the stores in my area received them in. I was incredibly impressed with the battery life for an iPhone. The battery life was awesome up until the last few weeks. Now I can hardly make it through the day on a charge. When I get around 20% power left its only a matter of a few seconds before the batter jumps down to below 10% without me doing anything. Immediately after that it shuts off and refuses to come back on when only 30 seconds ago it said I had 20% battery power.... I'm not a terribly heavy user on my phone. I just check the social media sites a few times a day and send a few text messages and that's all. I've shut off location services, Bluetooth, automatic updating of email, closing apps and all that stuff. I'm almost always connected to wifi when I do anything with the Internet on my phone.

Hi, beth.lau.gr.
Thank you for visiting Apple Support Communities.
I understand you have been experiencing issues with your iPhone restarting and showing you a blue screen. I wont be able to give you an exact answer as to why this is happening. However, this is the most relevant troubleshooting article for this issue. This article also provides options to reach out to us via phone for additional assistance.
If your iOS device restarts, displays the Apple logo, or powers off while you're using it
http://support.apple.com/en-us/HT203899
Cheers,
Jason H.

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Hi,
I simply use the phone until I have only a little charge left. Once that's reached I'll simply let phone idle completely or drain the rest with lightweight use. We have big difference here as I can actually reach 1% rather than phone dying at 20++ percentages. Previous said, e.g yesterday phone just died after some use with 12% battery left and started again when bringing indoors. I was then able to drain the battery from 12% -> 1% before it eventually died completely. After this I couldn't start the phone anymore instead getting the charge icon constantly, so I just plugged it in at that point. After charging over night I would then consider the battery charge meter calibrated.
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-p

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Try here.
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Launch the Console application in any of the following ways:
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from the menu bar.
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Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message (command-V).
If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.
☞ The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
☞ Some private information, such as your name, may appear in the log. Anonymize before posting.

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*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

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Hi,
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Faulting application name: dns.exe, version: 6.3.9600.17031, time stamp: 0x530871fb
Faulting module name: dns.exe, version: 6.3.9600.17031, time stamp: 0x530871fb
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Hi,
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thanks in advance..

My battery keeps jumping down to 0% from around 30%.

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