If you grabbed the iPhone 4 jailbreak and the ultrasn0w unlock, have you spotted a sudden decrease in your iPhone 4 battery life? Forums are filling up with tales that the combination of the two is seriously sapping battery life. Read on for details and news on what the coders have to say about it…

The iPhone 4 jailbreak and the updated ultrasn0w were greeted with much rejoicing by Apple fans eager to crack open their phones and pop them onto any network. But some are now decidedly glum reporting battery life dropping on average by 5% an hour when their phones are on standby.

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While some iPhone 4 users rocking the iPhone 4 jailbreak and ultrasn0w suggest the issue is down to other jailbreak apps, the unlock tool seems to be the consistent element behind the problem. Users who’ve removed ultrasn0w but stuck with the iPhone 4 jailbreak have reported that the battery drain issues have disappeared.

Others have gone even further and restored their phones to undo the iPhone 4 jailbreak entirely. Presumably they figured that the loss in battery life was not worth the ability to grab unofficial apps and deploy other tweaks.

Planetbeing, the iPhone Dev Team member behind ultrasn0w, said on Twitter that it is now investigating the claims. We’ll keep an eye on developments and let you know if he reveals what’s causing the iPhone 4 battery bother.

If you’ve used the iPhone 4 jailbreak and ultrasn0w, have you noticed a drop in battery life? Share you experiences in the comments below.

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  • http://pulse.yahoo.com/_VWY546QETZSRAXPSEH473RDFGE Your Daddy

    yes, my battery power seems far worse than a 5% an hour drop…could be other apps too, but i'm pretty careful to make sure things aren't running in the background. It's bad, I had 100% charge this morning, and now 8 hours later I'm at about 15%. now, i WAS browsing and listening to some music on the way to work, but that was only about an hour or so of time…

  • Sprinjee

    Had my iPhone on for 3 days (waiting for Micro-sim) it was still not half way by the time the Microsim arrived. JailBroke and installed UltraSnow: battery is now 6 hours max! Wifi off, 3g off, BlueTooth on, 2g on, push email on.

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