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Greets.
How many time does your Prophet works until you get 0% battery?
Is it normal that mine only lasts for 2 days, being that it is always in standby?
Thanks.
usually 3-4 days, 2 days is not normal if it is always in standby, unless you have bluetooth and/or wifi on.
Suggest you also turn off the IR beam receiver, as well as the BT and WiFi. all of these consume power in standby.
You can also turn the backlight down. Mine runs at 25% backlight setting, which seems fine. Standby time is 5-7 days, although it's easy to run out of power in a couple of days with lots of calls and/or application usage.
Tom Tom 6 is the hungriest I found so far, running processor, backlight and BT. Then the S200 only lasts about 6 hours on battery!
Backlight and wifi does NOT consume anything in standby, as both are OFF.
BT and IRDA (quite) does only consume power if it's exchanging data with another device, even if the pda is turned on.
lastnikita said:
Backlight and wifi does NOT consume anything in standby, as both are OFF.
BT and IRDA (quite) does only consume power if it's exchanging data with another device, even if the pda is turned on.
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Sorry, you are wrong about BT and IRDA. Let's take them one by one:
Mobile on - IRDA on - consumes power since it is all the time polling the sensor for incoming transmissions. Consumes more power when transferring data.
Mobile on - BT on - consumes power since the radio transceiver is on. Consumes more power when transferring data.
Mobile standby - IRDA on - does not consume any power, but cannot receive transmissions
Mobile standby - BT on - consumes power since transceiver is on, and transmissions bring mobile out of standby
Sorry, but I'm not
acer175 said:
Sorry, you are wrong about BT and IRDA. Let's take them one by one:
Mobile on - IRDA on - consumes power since it is all the time polling the sensor for incoming transmissions. Consumes more power when transferring data.
Mobile on - BT on - consumes power since the radio transceiver is on. Consumes more power when transferring data.
Mobile standby - IRDA on - does not consume any power, but cannot receive transmissions
Mobile standby - BT on - consumes power since transceiver is on, and transmissions bring mobile out of standby
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The power consumptions you're talking about are insignificants, and won't reduce battery lifetime (except for a few minutes, but hey we don't want to spend time on this right ?)
If you don't want to run tests by yourself, please read this :
http://www.pocketpcmag.com/blogs/index.php?blog=3&p=706&more=1&c=1&tb=1&pb=1#more706
niko
lastnikita said:
The power consumptions you're talking about are insignificants, and won't reduce battery lifetime (except for a few minutes, but hey we don't want to spend time on this right ?)
If you don't want to run tests by yourself, please read this :
http://www.pocketpcmag.com/blogs/index.php?blog=3&p=706&more=1&c=1&tb=1&pb=1#more706
niko
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thanks for the link, it was very informative, however negligible is not the same as nothing for someone trying to squeeze the most life out of a battery.
This does not change the fact of course that rjtd has a worse problem than just leaving BT and IR on!
I never ran such a test to tell so, don't know if mine would last longer than 2 days in standby..... but I guess it would
I usually have to charge every night, although it's not empty, I know it would be the day after ^^
Mine lasts for about a day and a half. It is overclocked when active (to 260Mhz) and i use navigation for about 1 hour a day average. Phone calls are usually ~15 minutes per day.
These are estimate values and may vary. BatteryStatus helps knowing about these as well
When i don't use navigation it lasts for two full days. Usually ends the 2 day period with about 5-10% battery.
a reply more direct to the original question - a friend of mine who applied the latest Dopod shipped ROM and is not a heavy user, i.e. calls, sms', standby, organiser, no games etc, has his battery lasting about 4 days.
Just a quick question since I cannot find a definative answer anywhere - not sure if there even is one...
When does the heat generated by a mobile device which is connected to wifi become a concern? I'm using my HD to listen to internet based radio more frequently recently, and was wondering is there any likelyhood of long term damage by leaving it connected, say, overnight?
I've never seen any warnings or guidelines about how long is safe continuous use is, so I presume you could stay connected as long as you like?
as it says here:
http://www.htc.com/sea/faqs.aspx?p_id=179&cat=90&id=52198
not a problem
Anfloyd said:
Just a quick question since I cannot find a definative answer anywhere - not sure if there even is one...
When does the heat generated by a mobile device which is connected to wifi become a concern? I'm using my HD to listen to internet based radio more frequently recently, and was wondering is there any likelyhood of long term damage by leaving it connected, say, overnight?
I've never seen any warnings or guidelines about how long is safe continuous use is, so I presume you could stay connected as long as you like?
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Wifi drains the battery very fast and produces lots of heat, this two factors combined reduce the life of your battery, there are programs that show you the temperature of your HD battery, you shouldn't use your device above 35ºC.
There are also problems while using WiFi and recharging at the same time, this can overheat your device, I recomend recharging while the device is on standby.
For li-on battery tips please refer to:
http://www.batteryuniversity.com/parttwo-34.htm
Thanks for the helpful - and speedy - responses!
Hi! First sorry for my bad english, i am from Hungary.
Can you say how much power consume the camera in your hermes? I use acbPowerMeter, and it shows about 250-280mA consumption when i take a picture. Same situation, when i connect to a wlan network, it consumes much energy too. It's normal with this device?
salmaj said:
Hi! First sorry for my bad english, i am from Hungary.
Can you say how much power consume the camera in your hermes? I use acbPowerMeter, and it shows about 250-280mA consumption when i take a picture. Same situation, when i connect to a wlan network, it consumes much energy too. It's normal with this device?
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I don't have figures to hand, but both camera and wlan do consume large amounts of power. This is why the camera auto shuts down after a minute or two. W/Lan will kill the battery if left on for more than a couple of hours.
Mike
mikechannon said:
I don't have figures to hand, but both camera and wlan do consume large amounts of power. This is why the camera auto shuts down after a minute or two. W/Lan will kill the battery if left on for more than a couple of hours.
Mike
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Thank you I like my hermes, only this two things annoyed me, but if you say its normal, i accept it. Hermes is a good device
How does idle data connection effects on battery?
It increases the battery usage.
Be sensible, dont waste forum space.
EDIT: If you are really interested maybe you could do some tests of your own instead of asking, i presumed you haven't searched the forum already so maybe you should try that first.
Well most of us have some sort of background data going on. I read some posts saying that it's actually better to leave wifi ON when in a coverage area so that way 3g won't be used for background data.
Can you share your experiences on this? To me it sounds a bit far fetched and even if its true, maybe it should be considered sort of a power malfunction that wifi would take less battery than 3g??
I wanted to try it out the other day and left wifi on during office hours, but ended up talking so much on the phone that dat that the result would not have meant anything... will try again maybe next week if I don't get and clear cut input.
Thanks in advance for any info
Sent from my HTC Vision using XDA App
100% True. If you are coming from another OS it might throw you. It threw me coming from windows.
It really saves battery. Try and see.
Huh? Nonsense!
Maybe if you put it in airplane mode (turn off the cell radio), but simple fact is that the more stuff you power up, the less your battery lasts.
I actually keep my WiFi on in the office and at home and believe I get better battery life (sleep policy set to never). No official tests, but I didn't use to get more than a day's worth of use before the switch. To be fair, I've made a lot of changes to my phone since then, so I don't know how much can be attributed to the WiFi change. You should definitely try it.
And I definitely don't believe it to be nonsense. The 3G radio apparently draws quite a bit of power and will constantly cycle for background syncs (which draws more power than a sustained connection for the same amount of data transferred). When the WiFi radio is enabled and connected though, the 3G radio is turned off. Depending on just how much power the 3G radio draws versus the WiFi radio and how much data you have syncing, it makes sense that using WiFi could save some battery life. The added bonus is that you use less data on your plan as well.
This might be different if you are using 2G though (since voice uses the same radio, it might be powered on the whole time anyway). No idea. Just have to try for yourself.
EDIT: Thought of another factor. Since WiFi will typically be faster, data is transferred for a shorter amount of time (perhaps drawing less power). The 3G radio also transmits data over a much longer distance than WiFi is capable of, which may cause it to draw more power as well.
And if your cell coverage is spotty, then the difference is even more pronounced. If you have wifi available, use it. You won't regret it.
Sent from my T-Mobile G2 using Tapatalk
This is indeed true, through experience i know it saves battery life, especially as someone said if your 3G coverage is patchy. The radio automatically adjusts its power o/p level depending on rx signal strength, so the o/p is more if signal is weak, therefore more batt usage. Also, it is worth noting that power is only really used when data exchange is taking place on wifi, so leaving it switched on, especially when connected does in fact save power, as when background syncing does take place, its done over a shorter period of time, again, saving overall power usage. The only time power usage goes up with wifi being left on is when out of range of an access point and the wifi is periodically checking for presence of an access point. I personally leave mine permanently switched on, and don't worry about it, it's more convenient that way.
Cell radio uses much more power when actually receiving or transmitting data, and much much less power when it is idling.
WiFi uses much less when sending/receiving data, but more power when idling.
Basically, your mileage is going to vary based on what apps you use and what apps pull down background data. If you've got a lot of apps that constantly use background data or you are constantly browsing the web on your phone, you will probably get more battery by using WiFi.
But if you disable most of your background data services and only use your phone every now and then, you will see much better battery life by just sticking with 3G.
edit: I also want to point out that the guy above me is, in fact, wrong. WiFi uses much more power than 3G when not exchanging data, even if it is connected to a network. The battery savings you're seeing is because every time your 3G radio goes from idling to transmitting, it uses an incredible amount of battery that completely offsets the idle usage of the WiFi.
I agree with everyone here, you will get better battery life with wifi because using the radio will drain battery faster when downloading. It is more efficient in pulling down data. I have mine almost on all day long in the office and at home. I do use the sleep policy, and very satisfied with the battery life on my phone.
Sent from my HTC Vision
Sorry to say but your just plain wrong. Try it out. The evidence is there. So is the documentation from users and google themselves. Its empirical man
dhkr123 said:
Huh? Nonsense!
Maybe if you put it in airplane mode (turn off the cell radio), but simple fact is that the more stuff you power up, the less your battery lasts.
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Sent from my HTC Vision using XDA App
xencor said:
Cell radio uses much more power when actually receiving or transmitting data, and much much less power when it is idling.
WiFi uses much less when sending/receiving data, but more power when idling.
Basically, your mileage is going to vary based on what apps you use and what apps pull down background data. If you've got a lot of apps that constantly use background data or you are constantly browsing the web on your phone, you will probably get more battery by using WiFi.
But if you disable most of your background data services and only use your phone every now and then, you will see much better battery life by just sticking with 3G.
edit: I also want to point out that the guy above me is, in fact, wrong. WiFi uses much more power than 3G when not exchanging data, even if it is connected to a network. The battery savings you're seeing is because every time your 3G radio goes from idling to transmitting, it uses an incredible amount of battery that completely offsets the idle usage of the WiFi.
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Check your information before correcting someone please, you may be right about the idle thing in terms of data transfer, although minimal, but the radio's on a phone don't switch between rx/tx like a walkie talkie does persay, but is in actual fact duplex in digital form, it involves syncronous timeslots and all sorts of complicated technical stuff. As I said before the main contributor to battery life hit on a phone is data exchange via high speed switch such as hsdpa/hsupa at weak signal conditions.
Clivectmob said:
Check your information before correcting someone please, you may be right about the idle thing in terms of data transfer, although minimal, but the radio's on a phone don't switch between rx/tx like a walkie talkie does persay, but is in actual fact duplex in digital form, it involves syncronous timeslots and all sorts of complicated technical stuff. As I said before the main contributor to battery life hit on a phone is data exchange via high speed switch such as hsdpa/hsupa at weak signal conditions.
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Uh, okay? I never said that part was wrong (in fact I agreed with it, although using different terms). I was specifically stating that your comment on WiFi using minimal power when idling ("Also, it is worth noting that power is only really used when data exchange is taking place on wifi") is completely opposite what is true.