If I have both Wifi and EvDO data available, which is better on the battery life?
I'd guess that strong connections for either use less battery life?
Hands down it's Wi-Fi, nearly every time.
lexluthor said:
If I have both Wifi and EvDO data available, which is better on the battery life?
I'd guess that strong connections for either use less battery life?
Click to expand...
Click to collapse
EVDO ought to be much easier on the battery, especially if you are not using the link constantly and are allowing it to become dormant when not in use.
Setting the WiFi adapter to run in power save mode instead of maximum throughput mode will significantly improve power consumption with respect to 802.11, but I'd imagine that unless you are spending way much more time with the device active due to download times being much longer for very large transfers, EVDO will continue to be more power efficient.
Wifi will give you about 25% better battery life for the same transfer time. From what I have seen EVDO draws about 400-500 mA, WiFi 275-325 mA.
Related
So I'm constantly walking into areas where I have no signal at my school. The result is an increased drain in my battery in these low signal areas.
This is a problem that I have noticed on all roms. Radios also seem to have little effect besides changing some current draw bound (ie -4 to -9).
I use radio 2.14.50.04.
when I have signal (guesstimates)
In standby idling between -2 to -6 ma
30% Brightness Screen idling, -100 to -150ma
however when I have no signal current draw increases to -80ma and higher and doesn't go down until I'm in an area with signal.
This would result in a standby time of only ~15 hours.
When compared to my standby time of -2 to -6.... at the least would provide a standby time of 205 hours.
Are other people getting the similar results under the same conditions?
I use tBattery to log my data.
Oh and I'm currently using Energy Sencity Rom with Cookie 2.0 Final (november 19) if anyone is interested.
My soft reset button is red
I have a TMOUS branded HD2
It just seems unreasonable that my phone should continue polling for signal for 2 hours and drain 20% of its battery during class...
Perhaps someone has a reg tweak for this?
post tBattery logs if you can and state conditions for changes in current draw.
edit:
perhaps its not clear what my question is from this post...
Is there a fix to substantially decrease battery drain when the HD2 has no signal (airplane mode doesn't count )
iPhone seems to have got it down....
bump
Are other people experiencing this issue?
Same happens here with TMobile US HD2. I disabled Sense and that helps with battery life, but I'm curious to find a solution. Tried wmlonglife and band switch, but wasn't happy with either.
tried that as well
I have also tried WMLonglife and CMBandSwitch as well, didn't really solve my issue...
wmlonglife helped a little, but it was still kinda unpredictable, sometimes it would work.... it doesn't actually solve the problem of signal searching....
also, I think this happens 90% of the time, not *all* the time... sometimes, after being in an area with low signal, my tbattery may show a reading of -7....
I'm not sure if the registry has a way to fix this....could be radio related.
bump
i think it is okay to bump this....
I get the most battery drain in a building when I have no signal.
Other than that, outside or in my house the power consumption is very good (2-7ma)
*i get 80-130ma consumption in buildings...
I wish there was a way to decrease the increased power the antenna was using as well as increase the length of the interval the hd2 uses to search for signal....
that way, the power consumption would be close to the same in buildings with low signal as compared to areas with excellent signal....
really would like to get this resolved without having to swap out batteries.... Only problem left for me. Many other phones when they don't have signal don't seem to be affected greatly with this *cough cough* iphone....
ive noticed this too. when there is no signal the battery drains much faster, also happens if its continually switching between a good 2g and poor 3g signal.
i often just disable the phone until move back to a good area
would be great to have a fix... even it just gives up trying to get a signal after a period of time
as title says, which ROM for HTC Touch Diamond 2 has the best battery life?
energy with titanium or simple today screen
The ROM will help ~50% of your battery life need, but rest is depends on your kind of usage. Like what kind of network you are using and kind of signal strength you are in, kind of application that you use, your device backlight, WiFi and Bluetooth etc adds to that rest 50%.
Also I am not sure how one ROM will be different from other in 1st 50%, but I feel Photon ROM is good for me.
You may also consider testing different ROMs so that you can confirm as per your usage
well, less eyescandy and function/background service usually mean better battery. The most power hungry component in our phone is the screen and radio (radio include those 2G/3G and wifi).
So, choose a rom running titanium (winmo 6.5 default), mess around with the backlight settings, and choose the right radio mode to meet your Internet usage. If you transfer data heavily over mobile network, choose 3G when available, else 2G/GPRS network will do the job. On my testing, for a same amount of data (i.e. 5MB), transfer using 3G consume less power than 2G. Wifi is more power hungry compare to 2G/3G on my experience.
for the measuring the actual currant of the battery, you can use the software BattClock. This tool helps me a lot with the power consumption controlling. Also can show many other informations like freeRam or CPU usage.
Dismissing things like sync and widget updates, etc., which option do you think ultimately saves more battery life? On the one hand you have wifi constantly locked on even if the phone is in deep sleep for hours. On the other hand, if you find that you use the phone quite a bit in spurts, wouldn't it seem that the wifi constantly turning on and connecting, then turning off during sleep, would actually use more power than just being constantly connected?
It might be a bad analogy but I liken it to when you turn a car off and then on as it uses more fuel compared to just letting it idle for a few minutes instead. Would this be the same with power consumption on our phone?
I've seen many articles that indicate Wi-Fi is much better on battery life then using 3g. So I've been running my like that for awhile. Not sure about the results though. Wi-Fi is now my second biggest battery drain, behind Display.
Mine is set to stay ON always. I get better battery life when using wifi.Some say the opposite, try both ways and see which works best for you.
Sent from my SAMSUNG-SGH-I777 using XDA App
I have the policy set to sleep when off. Even when I do use my phone regularly, I find that at times its going to help you save more battery life without having wifi constantly scanning for access points.
Red5 said:
I have the policy set to sleep when off. Even when I do use my phone regularly, I find that at times its going to help you save more battery life without having wifi constantly scanning for access points.
Click to expand...
Click to collapse
Just up the scan interval.
Standby drain of our wifi chip is VERY low, less than 1/10 that of the original GalaxyS series if power_profile.xml is correct - and it's FAR more power efficient to transfer data over wifi than cell radio on our phones for a variety of reasons.
It has been documented that using wifi when at home (for example) can conserve battery, however in most cases there is a stable GSM signal. For this reason the phone will not waste a lot of battery trying to connect to the cellular network over and over again. However, I have an unusual situation that I would like advice on. My office has TERRIBLE reception and in fact I constantly lose/regain signal all day long. I believe this contributes to relatively low battery life on my phone(s) that I use. We do have office wifi however, and I am wondering how connecting to it will impact my battery. Would that improve the battery drain, or would it actually make it worse?
Let's say all things equal, which would drain the phone battery the most - being on WiFi or on LTE?
I know on older phones LTE round drain the battery like I drain a glass of beer, but I'd imagine the chips are much more efficient now than they were back then. Is one more battery efficient than the other?
Phones are still designed to use WiFi if possible when both WiFi and data are available and this behavior is independent of any data saver settings you might use so it's a pretty safe bet that 4G still uses more power.