Jailbroken iPad 2 battery issues

[Kratos8051]

Hi guys,

I just want to find out something from the guys with jailbroken iPad 2's.

I jailbroke mine when the official jailbreak was released (I'm on 4.3.3) and installed Installous and SBSettings. After a couple of days not really using my iPad much, I started reading a PDF on it while listening to music. I noticed that the battery was draining quite rapidly. I could literally see the percentage drop as I was using the device. It went from 15% to 5% in under an hour. After investigating which applications were running on the device, I saw that SSH was turned on (I must have forgotten to turn it off). This was the only additional application running besides iPod and PDFreader. As a method to investigate the rapid drainage, I immediately turned 3G, Wi-Fi and Data Carrier (and kept SSH off) off and recharged the iPad. Over the weekend I saw on Cydia that an update was released for the jailbreak, which I installed. However, this changed absolutely nothing. Reading a PDF while listening to music drained the battery by 14% in under an hour. This was with NO applications running except iPod and PDFreader and all network functions disabled.

Did you guys also experience rapid drainage after jailbreaking your iPads? Should I maybe re-jailbreak it?

 

[JStrike]

I had the same issue with the iPad 1. Un-Jailbreaking it fixed the issue

 

[Kratos8051]

I had the same issue with the iPad 1. Un-Jailbreaking it fixed the issue

So you didn't try to jailbreak it again to see if the issue was solved?

 

[JStrike]

No, every time I have jailbroken my iPhone or iPad, I regret it shortly thereafter. It always causes instability and decreases my battery

 

[Kratos8051]

Thanks for you reply, JStrike. It is a bit strange. It seems like a random occurance. Some people on the internet report rapid drainage of the battery, whereas some say they hardly notice any difference after jailbreaking their iPads. I jailbroke my iPhone and didn't have any issues afterwards.

Anybody else experiencing issues on their iPad 2 after jailbreaking?

 

[Kratos8051]

So, nobody else experiencing battery issues??

I thought that since the jailbreak is based on an PDF exploit, that this issue might only occur when I read PDFs, but I was wrong. It seems like this is not application dependent.

 

[Primo]

Did you run cydia after to check for any updates? I know that there were problems when jailbreak first released and comex fixes them through patches on cydia

 

[Kratos8051]

Yes I did, but it didn't make a significant difference. I'm starting to think I should try a restore and then jailbreak again. That it supposed to use comex's new jailbreak. Maybe it makes a difference.

 

[dlk001]

Over the weekend I saw on Cydia that an update was released for the jailbreak, which I installed. However, this changed absolutely nothing. Reading a PDF while listening to music drained the battery by 14% in under an hour. This was with NO applications running except iPod and PDFreader and all network functions disabled.

Did you guys also experience rapid drainage after jailbreaking your iPads? Should I maybe re-jailbreak it?

The update released on Cydia was to solve the iPad2 Camera Connectivity Kit problems.

Have you tried unjailbreaking the device, jailbreak it again, monitor battrey life before installing any Cydia software?

I charge my iPad2 this morning, i'm running a few background software, 3G/WiFi on, Backgrounder installed, checked a few emails and the battery is still at 97%.

 

[Kratos8051]

Thanks for your feedback.

The update released on Cydia was to solve the iPad2 Camera Connectivity Kit problems.

I read elsewhere on the forum that there were some people experiencing issues with that. I was hoping the update fixes more issues. Thanks for clarifying.

Have you tried unjailbreaking the device, jailbreak it again, monitor battrey life before installing any Cydia software?

No, I haven't. This is a good idea. I didn't install any apps except Installous and SBSettings, but this might be a good bench to find out if this is the jailbreak's fault or some application running (or something I installed).

I charge my iPad2 this morning, i'm running a few background software, 3G/WiFi on, Backgrounder installed, checked a few emails and the battery is still at 97%.

Before jailbreaking, this was the battery life I was used to. But now, if I use the iPad as I normally would (i.e. reading a couple of emails, reading one or two documents with Wi-Fi and 3G on), a fully charged battery would be around 50% by the time I get home in the evening.

 

[Kratos8051]

Ok, after some struggle to restore my iPad 2 to 4.3.3, I re-jailbroke it but didn't install any applications from Cydia. I've just listened to .mp3s for over an hour and the battery dropped from 52% to 50%. I'm going to do a similar test with a PDF open and see how it affects battery life. For now, it looks positive. Will post an update in a while.

 

[sand_man]

10% battery loss per hour, where the screen is constantly on, doesn't strike me as unreasonable. 10 hours in total and in accordance with the devices specifications..

 

[Kratos8051]

10% battery loss per hour, where the screen is constantly on, doesn't strike me as unreasonable. 10 hours in total and in accordance with the devices specifications..

If I'm not mistaking, the spesifications provided by Apple is 10 hours battery life while web browsing using Wi-Fi, and 9 hours using 3G. I'll look it up online. I figured that turning 3G and Wi-fi off, with the screen brightness on 40% would improve battery life.

 

[Kratos8051]

Maybe sandmanm34 has a point. I just did the second test and I've decided to keep the screen on, but turned Wi-fi and 3G off. The battery dropped from 50% to around 40% in an hour. I found the specs of the iPad on the Apple site and it is: "Up to 10 hours of surfing the web on Wi-Fi, watching video or listening to music". Maybe I didn't really notice the battery life before Jailbreaking. As a definitive test, I'm going to restore and run the same test with no Jailbreak.

 

[sand_man]

As a definitive test, I'm going to restore and run the same test with no Jailbreak.

Ja, would be quite interesting to note the difference, if any, pre and post jailbreak. I wouldn't suspect Cydia and the jailbreak to be a drain on resources. Add to that some of the tweaks and mods unique to Cydia such as Multicleaner, lockscreen and auto dimming mods ect and it's quite plausible for a jailbroken device to actually last longer on a single charge...

 

[Kratos8051]

I will restore tonight, run the test and give some feedback tomorrow. Thanks for suggesting a couple of Cydia tweaks to try out once this experiment is over

 

[Kratos8051]

Sorry for not giving feedback on Friday, but was away from my PC and internet. I did a complete restore on my iPad 2 and ran the test again and got exactly the same results. The battery dropped by 10% in about an hour. So, in short, jailbreaking didn't affect battery life. I guess that I haven't been using my iPad constantly for an hour before jailbreaking and thus never notice the battery drain. I assumed a better battery life playing mp3s and reading PDFs so I assumed the battery drain was due to the jailbreak, which it is not. It is due to the awesome screen, which drains a lot of power.

 

[Kratos8051]

Just some interesting info for the people still following my rambling. Today I used my fully charged, jailbroken iPad to read documents and listen to music and the battery dropped with 11% over two hours. I guess it has something to do with the discharge curve of lithium-polymer batteries, where the initial discharge is slower.