HTC EVO 4G :: Underclock Voltage

Sep 12, 2010

Is their any app or a way to underclock the voltage I c that when my battery level drop to about 60% my voltage level lowers an my phone last longer compare to when the battery was full completely.

HTC EVO 4G :: underclock voltage


Motorola Droid :: UPDATE - New Kernels - Low Voltage - Medium Voltage

Mar 26, 2010

As usual, these are update.zip format. Rename to update.zip, place on root of sdcard, and install (don't forget to 'allow').

My advice to you, in selecting a kernel, is to #1 try the lowV varieties first. Then select the slowest kernel that exceeds what you expect to run on a day to day basis. So if you plan on running 800-1000, run the 1.0lv kernel.

If for some reason you get stuck on the 'M' while booting, first try switching to the mediumV kernel. If that does not work, back the speed down, say from 1.25 to 1.2, or 1.2, to 1.1, etc.

5-slot Low Voltage

1.0Ghz (125/250/550/800/1000)
1.1Ghz (125/250/550/800/1100)
1.2Ghz (125/250/550/800/1200)
1.25Ghz (125/250/550/800/1250)

5-slot Medium Voltage

1.0Ghz (125/250/550/800/1000)
1.1Ghz (125/250/550/800/1100)
1.2Ghz (125/250/550/800/1200)
1.25Ghz (125/250/550/800/1250)

7-slot Low Voltage

1.0Ghz (125/250/550/700/800/900/1000)
1.1Ghz (125/250/550/800/900/1000/1100)
1.2Ghz (125/250/550/800/1000/1100/1200)
1.25Ghz (125/250/550/800/1000/1100/1250)

7-slot Medium Voltage

1.0Ghz (125/250/550/700/800/900/1000)
1.1Ghz (125/250/550/800/900/1000/1100)
1.2Ghz (125/250/550/800/1000/1100/1200)
1.25Ghz (125/250/550/800/1000/1100/1250)

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HTC EVO 4G :: Underclock Cpu

Aug 10, 2010

Any way to do this for us non rooted 2.2 evo people? it would be nice to have a way to preserve battery life when it's getting a lil low.

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HTC Incredible :: Underclock CPU

May 3, 2010

Is there a way to underclock the inc? I'm thinking in doing this when I will be away from a computer for long periods of time.

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Jun 15, 2010

I am running darchdroid 2.6.4 at the moment and it has setcpu already installed. well i might have messed with the clock and now i know the phone is wayyy underclocked. (unuseable) so how can I get rid of Setcpu and go back to default clocks? its running too slow to get into RootExplorer. I know how to push an apk thru adb but have never deleted one. is that what I have to do? Is there a link explaining how to do this?> and can I do it with the phone in recovery?

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Sony Ericsson Xperia X10 :: Possible To Underclock CPU

Dec 1, 2010

I like to know if is possible to underclock the X10 CPU, I need more live on the battery.Is there some app thatÅ› make is possible?

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HTC Incredible :: Stock Kernel Underclock When Idle

Jul 19, 2010

Does anyone know if the stock kernel on the DInc underclocks the cpu when it has little or no lo load?

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HTC Incredible :: Rooted Stock 2.2 ROM - Free UNDERclock

Nov 1, 2010

Totally stock ROM and kernel other than being rooted.

Running Juice Defender and have noticed very nice improvement in batter life. Still want more.

Is there a free way to underclock the phone? I'm not looking for anything fancy, maybe two profiles: 384mhz with screen off and maybe 768mhz with screen on just to try it out for awhile. Overclock widget does not seem to work on my phone. Don't want to buy setCPU without trying first. Is there anything else simple and FREE out there?

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Oct 28, 2010

So I'm using jRummy's over/underclock app in conjunction with setcpu. Anyone know what the best settings are to increase battery life? Phone is fast enough so I'm not too worried about going under 1ghz.

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HTC EVO 4G :: ROOT - Using SetCPU - Perflock Disabler To Save Battery - Underclock

Jul 8, 2010

I'm sure many people has seen the thread where OverclockWidget was claimed to have increased the battery life for some people. Near the end of the thread I became skeptical and proved that it had in fact no effect on the CPU speeds at all, and so can not save battery life. Well, good news is that a new function in the competing SetCPU app will now get you a real, tested increase in battery life.

According to my tests, my Evo with the screen off should theoretically get a 64 hour battery life!

Know what you're doing? Short version: Get latest SetCPU (version at least 2.0.0) and use Menu -> Perflock Disabler in the Main tab to enable underclocking.

Don't know what I'm talking about? Good, follow this tutorial:

Prereqs:You need to have ROOT. Unrevoked root method is confirmed to work, and so is Toast's root method.

Usually I wouldn't recommend using Unrevoked, but it's just so fast to set up, and perfect for those who have no clue what ROOT means.

Buy SetCPU from the market, or download it from XDA forums for free. Please support the developer of this incredible app! The version must be at least 2.0.0b

Be on the STOCK kernel. If you're on a custom kernel, chances are that perflock has already been disabled, and you won't need this tutorial to underclock. Some custom ROMs come with the stock kernel (like Fresh 0.5.3) and some don't (like Baked Snack .9.6)

Alright, got the prereqs down? Lets start this.

HOWTO:Open SetCPU and give it root permissions as necessary. As a control, go into the Info tab and do the Long Bench a few times. You should get around 1000ms.

Go to the Main tab, hit MENU, hit Perflock Disabler (read the warning!), and hit Disable Perflock Beta: May crash!

It will work for a while, and then say it's successful. You can then click the X on the top right to exit the Perflock Disabler.

Go into the Main tab and drag Max: all the way down to 245000 (245Mhz). Make sure the green xxx max xxx min label above the sliders show 245 for both and also disable any Profiles you've set. Go to Info tab, then hit Long Bench again. This time you'll get something ridiculous like 5000ms, meaning that the Perflock Disabler has worked!

Change your settings Profile tab to something similar to my settings. You can mess around with the Battery < xx% profiles to fit your needs. Your exact Profile priorities do not matter, it's only important that some have HIGHER priority than others. On the Main tab, set Max all the way to the right (998400) and Min all the way to the left (245000), Scaling to ondemand, and check Set on Boot. Do not check Set on Boot yet if you're the super careful kind. You can check it later when you've tested that your phone isn't crashing

The last entry is Battery < 100%, set at lowest priority, with MAX as the highest value, MIN as the lowest value, and scaling as ondemand.

Congratulations you're now able to underclock your Evo!

Comparison:
The only applicable parts is after the charging finishes (after the solid green bar ends)

Before Perflock Disabler:

After Perflock Disabler:

See that little dip at the end? That's when I was turning the screen on and messing with the phone for this tutorial. What a difference.

Disadvantages:Yes, not everything is happy and pretty. As the Perflock Disabler warning says, you HAVE to apply the Perflock Disabler on every boot. If you forget, then your SetCPU settings will have no effect on the Evo. Install a custom kernel that already has Perflock disabled if you do not want to do this on every boot.

Also, since this clocks the Evo down when the screen is off, you may get a slight (super slight!) delay when you turn the screen back on. This is because the profile changes from Screen Off to Battery < xx% and SetCPU needs to clock the CPU from 245mhz to 998mhz.

FAQ:
What is Perflock Disabler?
HTC added a "perflock" in their stock kernels to prevent over/underclocking. SetCPU's Perflock Disabler, like its name implies, disables this restriction.

How come your screenshots show that you can go down as high as 1.19Ghz and as low as 128Mhz?
I'm using this custom kernel.

Will this work with OTA update xxx.xxx.xxx.xxx?
Yes, as long as you have root, and don't lose it when you update (do your research!) then this will work.

What are your settings?
Wifi ON, Bluetooth OFF, GPS ON, Mobile network Data OFF (ATT contract with dumbphone still not over), Screen Timeout 1MIN, Brightness AUTO, Advanced Task Manager set to SAFE kill tasks when screen is off.

What is that cool looking battery monitoring app?
That's SystemPanel, paid on the market. A free alternative is JuicePlotter, also on the market. Screenshots were taken with Drocap2.

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Mar 10, 2010

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Motorola Droid :: Low Voltage Kernels

Mar 24, 2010

I kno usually low voltage kernels are ment to save battery but on some phones can it do the opposite cause I'm trying adamz on low and I feel like I'm burning battery faster without even doin anyything on the phone.So could the low voltage kernel be the cause?

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Nov 2, 2010

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HTC :: Voltage Difference B/w BB / Incredible Charger?

Apr 30, 2010

I forgot to bring my Droid Incredible charger with me to work. Since the battery was getting low I decided to use my BlackBerry Storm charger on it. The ports are the same, and it goes in without any problems. However, after doing this, it became difficult to unlock. Swiping down usually didn't work. If I was able to swipe down I couldn't get past the "password puzzle." I thought the phone was locked up so I pulled the battery, but it still wouldn't swipe after coming back up. I took the charger out and realized I could swipe again. I repeated this, again plugging the charger in and again I was unable to swipe to unlock. Is there a voltage difference between the BB charger and the Incredible charger? It seems like it was charging it fine. JuicePlotter shows a charge while it was plugged in.

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Motorola Droid :: Best Low Voltage Kernel?

Apr 19, 2010

I just installed Cyanogen from DroidMod and while I was at it, I installed the p3 1ghz low voltage kernel. So far, I'm pretty happy. I'm not sure it's been a huuuge battery saver, but I think it's helped. Wifi and bluetooth have been on all day. A few phone calls. Lots of texting and emails. Also some market apps downloaded as well as files transferred on/off. At 8:30 my battery life is at 50%, which is pretty damn good considering how much better that is from strait out of the box on release day.

I'm running 800mhz overclocked, instead of 1ghz to save some power. Should I switch to a different kernel since I'm not even using the 1 ghz slot?

What's the best low voltage kernel for battery life, overclocking included? No need to even bring up stock speeds...

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HTC Desire :: Car Charger Voltage Inputs

Aug 18, 2010

Ive been given a usb 12 volt charger to use with my desire which works whereas the official 1 doesnt (due to my car being french), question is on the official 1 it says input is 10 - 30 v 0.8A output 5v 1A and the 1 ive been given has input at 12 ~ 24 vdc output 5v dc 1A. would the 1 i have been given charge the phone ok

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HTC Desire :: Difference Between Battery Voltage And Mah

Oct 26, 2010

What does mah actually mean for a battery ? I have a stock 1500 and an after market one rated at.2650 (allegedly !) The max voltage for each is c.4172mv. How does the mah come into play ?

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HTC Incredible :: Low Voltage Kernal By Ejhart

Jun 24, 2010

Get it here. [Kernel] Stock speeds undervolt. [update] - xda-developers

I am using it and my phone seems to run much much cooler. Haven't really tested battery life yet, but it seems better.

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Jul 27, 2010

Possibly a simple answer to this question -- can the USB charger that ships with the Droid X be used with 220 volts in addition to 110 volts? I am planning to take my Droid X to India and need to figure out if I should plug the charger into a 110/220V travel converter, or if the USB charger is already dual voltage and I'll only need a plug point adapter. The voltage specified on the charger has 240V as the upper range, which leads me to think it should work with 220V.

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Feb 11, 2010

I live in the UK and have ordered my Nexus One from the US, without a UK adapter. My question is what voltage the standard AC adapter uses, as the UK runs 240V typically. I can get hold of a cheap US-UK power adapter that doesn't do any voltage changes, so I was wondering whether that would be sufficient. Does anyone have any experience with this?

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May 26, 2010

Assuming I keep CPU speeds the same as stock, is a low voltage kernel going to save my battery life significantly?

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Motorola Droid :: Increased Voltage Kernels?

Apr 9, 2010

After realizing I can back up e-mail settings and home screens, I updated to the latest Cyogen (just one step). Now I'm putting my kernel back on (Becket) and I noticed there were increased voltage kernels.

I just installed 1.2 low voltage. Hope it runs well.

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Jul 22, 2010

Been wondering this for a few days. Does setCPU raise CPU voltage when it overclocks ?

Because if it doesn't, then battery life shouldn't be affected.

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May 11, 2010

With all droid dead where can I find Chevy's low voltage kernel?

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Dec 4, 2013

Does it drain more battery when I overclock the GPU but not the voltage?

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Mar 22, 2010

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Aug 7, 2010

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