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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Mar 10, 2010
I am thinking of flashing one of them tonight, but wanted to get some feedback from anyone who has been using them. Does wifi tether work? How stable do they seem? Any strange problems/bugs? Any replies are appreciated.
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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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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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Nov 2, 2010
what is the purpose of a low voltage kernel?
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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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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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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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May 11, 2010
With all droid dead where can I find Chevy's low voltage kernel?
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Nov 2, 2010
according to the new OC app from (can't remember) anyways playing with the phone, angry birds, radio and browsing facebook I reached temps of 59c. How hot is to hot...?
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Aug 7, 2010
Amazon.com: Genuine Motorola Droid P323 Battery Charger System: Electronics Amazon.com: Motorola BP6X A855 Droid OEM 1300mah Standard Battery: Cell Phones & Service Anyone use these 2 items from Amazon? I'd like to get a second battery and an external charger, this seems like a cheap solution while keeping OEM parts. The only thing I'm really questioning is the voltage output of the external charger to the battery. Any way to tell if it will charger correctly? If you know the answer, please provide reasoning.
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Mar 22, 2010
I have several USB-MicroUSB cables (some OEM Motorola, some other brands), several 12 volt-USB converters, several cars, and several devices that accept MicroUSB connection for power. With everything other than my Droid (including a Blackberry and a GPS unit) every combination of cable and 12volt converter works. With the Droid, all of the combinations will turn on the screen (indicating the Droid knows a cable has been connected), but only a few combinations will actually charge the Droid. The only possible explanation I have come up with for this is that the Droid has some sort of minimum current requirement, and that some converter/car/cable combinations are unable to meet this requirement. So, what is the minimum voltage and current that will allow the Droid to charge?
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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.
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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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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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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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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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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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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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Dec 4, 2013
Does it drain more battery when I overclock the GPU but not the voltage?
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Sep 23, 2010
Is there an API in android to access the headphone hardware input? Ideally I'd like to be able to directly read the incoming voltage/current. Accessing this in either Java or the NDK would be fine. Preferably if there's a way to do this on non rooted phones.
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Oct 9, 2010
Any ideas what the voltage a charger needs to be to recharge the HTC desire's battery?
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Dec 3, 2011
I was wondering if there is a way to set the minimum voltage cutoff (when the device forcefully shuts off), if it's device specific then we are working with the HTC Aria. The reason why I ask this, is that I have a device with a 12 Ah (that's 12,000 mAh) battery. Now I'll be straight, I'm an EE so software is not my forte, I work with analogue circuits, not software. So my knowledge of programming is nil. I was going to go the extra mile and make a flyback regulator to keep the voltage at 4 volts all the time (I can get it to work down to .5 volt if I wanted), but did not want the extra mass. (Already have 3 long C cell size sized batteries, don't need a PWM board on top of that). If this is the wrong thread, call me a noob and kick me in the nuts a few times, will ya? BTW the minimum voltage we are working with is 3 volts.
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Sep 27, 2010
Have been testing kernels the past few days, have a few thoughts:I've tried the Slayher v1.6 kernel, ChevyNo1's ULV, jdflg's, and p3droid's, all 1200mhz. With all kernels set to "on demand", I can't say for sure if any one gives more battery life than any other, my usage is too variable. P3Droid's are 125mhz base clock, while the others are 250 or 300mhz, but there wasn't an obvious difference with my use. I'm guessing at low clocks, processor drain is negligible unless you're going to be in a semi-sleep state for a long time. All kernels bench about the same, and P3Droid's don't feel any slower even with the lower base clock, which suggests to me that most kernel makers should consider including a sub-200mhz option. Kernels with "interactive governor" subjectively feel slightly faster when using interactive governor, but battery life is definitely a little shorter. All kernels seem equally stable. All kernels seem to run about the same temperature, with maybe a very slight edge to Chevy's ULV kernel (~2c loaded). Temperature monitoring is not very accurate. I turned on my phone earlier in class, to see a 13c CPU temp. That's about 8-10c below ambient. This is consistent on all kernels I have tried.
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Jun 30, 2010
If I am using one of the OC kernels (the ultra-low Chevy 1.2) is SetCPU necessary? If so under what circumstances?
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May 12, 2010
Alright so i just rooted my phone, I viewed other threads and I couldnt find exactly what I was looking for in simple words. So the question is. I want to install the NexBeast rom. How do i do that?
and how do you install kernels
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Mar 12, 2010
I have installed Chevy kernels before from the boot.img by plopping it into nandroid and advanced restoring only the boot.img. Always worked fine.Now nothing. Error 25 AdamZ Overclocking Kernel Test Results with Ultimate Droid 6.5 - Droid Forum - Verizon Droid & the Motorola Droid Foruml.
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Mar 1, 2010
I have read and searched everywhere on how to install custom kernels.I follow each step: download the file, change the name of the file to update.zip, copy file onto root of SD card, boot into recovery, go to install, select "Allow update.zip Installation", install.When it starts to install it pops up "no such file or directory" installation aborted.
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Aug 3, 2010
I recently finally rooted my Droid, last week. I did it by using the DroidRootKit. Love t so far, have installed Bugles Beast and UD. Question, I am reading about changing kernels for faster speeds. How is this accomplished? I have installed the new ROM's via the clockwork update.zip utility, but cant find solid docs on how to do the kernel?
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Nov 11, 2010
I am rooted on the Droid 1 with a stock FRG22D kernel and ROM.I downloaded WiFi Tether from the Market.I tried it out on several different laptops using different Windows OS.It appears to work great as long as Access Control (MAC Filtering) and WEP are turned off.If either is activated, all data transfer ceases. Other posts have also noted this issue which appears to be associated with the stock FRG22D kernel.My question is has anyone flashed a Froyo P3 or other kernal that will allow Access Control or WEP to work as intended with the stock FRG22D ROM. I am happy with the stock kernel and ROM but will consider switching if I can find a compatable kernel or other configuration.Any help on this issue would be greatly appreciated.
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