iPhone Can Jailbreaking permanently hurt battery life?

adcx64

macrumors 65816
Original poster
Nov 17, 2008
1,227
42
Philadelphia
I know that some tweaks will reduce battery life, but could it permanantly damage it? like after i restore to a stock ios 7 experience?
 

Amiz

macrumors regular
Jun 16, 2012
173
0
Unless your install a LOT of tweaks and apps, it's a possibility.
 

DavidBlack

macrumors 6502a
Jan 27, 2013
606
239
Somewhere In Apple's HQ ;)
So what about if I just use 5 Icon Dock? Will that use more battery life or none at all?
In my experience tweaks that have a lot of graphic features tend to use the most battery, as well as devices that interact with the devices radios. So I don't think 5 Icon Dock will use more battery life, and if it does it might only be minimal. Did that answer your question?
 

g35

macrumors 6502a
Dec 13, 2007
595
97
I know that some tweaks will reduce battery life, but could it permanantly damage it? like after i restore to a stock ios 7 experience?
No, the damage to battery life will not be permanent, if you restore your phone properly (google DFU restore, it's very easy). If you only install 5-icon dock, I suspect the change in battery life will not even be noticeable.
 

Menneisyys2

macrumors 603
Jun 7, 2011
5,407
206
I know that some tweaks will reduce battery life, but could it permanantly damage it? like after i restore to a stock ios 7 experience?
They can't damage it per se - at most, a stale process diving the CPU at (2x)100% will result in the device chewing thru the battery very fast. This means both battery warm-up and the need for recharging, which also increases the recharge count. The latter two will contribute to the battery dying earlier - say, after two years instead of three.

The solution? Only use reliable tweaks and/or routinely check your CPU usage with the OpenSSH + top combo (see THIS for more info). That way, you can very quickly identify the tweak running wild.

BTW, on iOS7, with both the iPad 3 and iPhone 5, I've made some serious experiments with some always-on tweaks I use (f.lux etc.) or deeply integrating into the system (Skype and normal Call Recorder) - no such problems with them. (More info HERE)

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So what about if I just use 5 Icon Dock? Will that use more battery life or none at all?
I'll thoroughly check it (with my arsenal of CPU usage testers) and report back.
 

iMrNiceGuy0023

macrumors 68000
Jun 5, 2009
1,599
0
My iPhone 5 battery acts crazy. It'll go from 100% to 50% in 20 minutes without me using it

Then it'll sit on the 1% mark for about 45 mins.

I'm sure it's because of my one too many tweaks. I never had an issue with my 4 or 4S battery while jailbroken.

I'll restore to iOS 7 next week to see how it acts
 

td1439

macrumors 6502
Sep 29, 2012
337
115
Boston-ish
They can't damage it per se - at most, a stale process diving the CPU at (2x)100% will result in the device chewing thru the battery very fast. This means both battery warm-up and the need for recharging, which also increases the recharge count. The latter two will contribute to the battery dying earlier - say, after two years instead of three.
This happened to me with my 3GS. I did a lot of theming on it, and because I needed to recharge it more often, by the time I traded it in for my 4S when my contract expired, it could barely hold a charge at all. It's also possible that I got a bad battery; my 3GS was a factory-restored unit which the guy at Radio Shack assured me had never been used, but who knows if that's true?
 
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