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Help Battery discussions, maintaining battery life

This is an early battery shot I took. Notice how the drop is decreasing in the periods when the screen is off. I believe this is a decent example of the calibration file being built up -

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As it's settling in, I think it's time to safely report that if I just use it to download vids via wifi with screen on auto-brightness (tested both day and night), I am consistently dropping about 10% per hour under that use case.

I'm very impressed.
 
Pretty good usage. Just to be clean, I put it through the ringer. Heavy, heavy use. Phone calls, browsing, youtube, nearly 8 hours of poweramp, texting, keeping EarlyMon busy on gtalk, Google+, many, many speedtests (with surprisingly phenominal results!), testing SVDO (YEAH!! IT WORKS!!), Did some fooling around with the GPS, and lot's of customizing and setting up.

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Not shabby at all for What i put it through...


Oh, and that rapid jump you see in the graph? That's a NANDroid backup.
 
Important Battery Tip!!

I run a notification bar widget that shows my CPU usage so I can check that on the fly at any time (Quick System Info PRO and go to prefs to turn it on).

So, I'm sitting at my desk, screen off, nothing running, and I decide to light it up and check my CPUs just for giggles and grins.

And I found that I had the primary core running at 1.5 GHz, secondary blinking on and off and 1.2 GHz and 70 to 80% cpu utilization on the primary.

I unlock and found that my dialer window was open under the lock. Back out of dialer to homescreen and suddenly, I'm back down to 14% running one core only at 384 MHz.

So, don't do that.

Second tip - seriously, root and get rid of bloatware. (I am about to do that, hopefully today, been pressed for time by real life so chance before.)

While I was typing this, I noticed that I spiked to 1.5 GHz for a few seconds - so I was lucky to catch that and even luckier that I could catch it in time to see the culprit:

HTC Check-in Service.
 
EarlyMon said:
I

Second tip - seriously, root and get rid of bloatware. (I am about to do that, hopefully today, been pressed for time by real life so chance before.)
Click to expand...

Can one do this by using Titanium and uninstalling certain bloatware apps/programs?

Just curious.
 
Lord Vader said:
Can one do this by using Titanium and uninstalling certain bloatware apps/programs?

Just curious.
Click to expand...


Yes.

System Tuner will also allow you to perform these functions as well, in addition to CPU/SD/Mem tweak. Must-have app if you're rooted.


Here's a question for the group in regards to my personal experience charging the Evo LTE via USB:

-EPST ##3282 (DATA) menu - USB charging will NOT stick
-battery life actually DECREASES with use

Anyone else having any USB charging abnormalities?
 
Lord Vader said:
Cool. Now I just have to hope I don't uninstall the wrong thing. :D
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Your safest bet is to just FREEZE them for now. In all honesty, unless you've got a ridiculous amount of apps, it's much more beneficial to save RAM as opposed to storage mem. Not to mention it's just easier to unfreeze apps/services, leaving the data intact, rather than uninstall/reinstall. Yes, you can backup the apps and save the data w/ them, but why not save 3-4 steps and 5 minutes by just freezing the apps or services you don't want to run? JMO. :D
 
pwrmedia said:
Your safest bet is to just FREEZE them for now. In all honesty, unless you've got a ridiculous amount of apps, it's much more beneficial to save RAM as opposed to storage mem. Not to mention it's just easier to unfreeze apps/services, leaving the data intact, rather than uninstall/reinstall. Yes, you can backup the apps and save the data w/ them, but why not save 3-4 steps and 5 minutes by just freezing the apps or services you don't want to run? JMO. :D
Click to expand...

Sounds like a good idea.
 
I recently transitioned from the EVO 4G to the EVO LTE. The EVO 4G had its battery problems, and there were a few lengthy postings containing settings to help optimize battery life. Is/are there similar "How To" lists for the EVO LTE? If so, it would be helpful to have them as a "Sticky" in the EVO LTE forum.
 
I have been getting excellent battery life with WiFi, Bluetooth, and LTE on at all times. Get a whole day and then some, I am generally not a super heavy user, but even on pretty heavy days I still go to bed with 30-40% left.
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Charged up to 90% in the car, spent 3 or so hours on the golf course with a GPS app running, used off and on for 4 more hours and only sucked out 50%, that is amazing!
 
I use BMW (battery monitor widget) to keep track of the phones charging. Mainly I'm used to it for checking up on the SBC Charging abilities I had while on the OG EVO.

I haven't seen this mentioned anywhere here (and I did a quick forum search for SBC), but when I get up in the morning and take the phone off the charger, the battery is sitting at 0mA. I also notice there isnt the typical 10% drop off that we had with the OG EVO.


After doing a little research on ways to conserve battery on this beast, I ran across some solid evidence on the MikMik forums to HTC at least incorporating what seems to be some trickle charging.

Battery Life on the ELTE? - Page 5


Anyone else notice this?



Edit:

Also, this battery takes forever to charge :p
 
Reposting image here:

attachment.php


So what I see from this charging history is that around 00:29, voltage was at its highest at 4196 mV, and the battery was still accepting some charge, albeit very little. At this point, the phone decides that the battery is full, and the voltage is reduced to maintain charge equilibrium (the slight drop in voltage causes no more net positive charge). This equilibrium point is what the battery indicator should define as full 100% charged. Then, throughout the rest of the night, the battery is very slowly draining while the voltage remains constant. This does indicate some trickle charging to keep the battery topped off, but this is not SBC at all.

SBC would spike voltage very high, causing positive charge to accumulate in the battery beyond this equilibrium point. But the voltage spike is short lived, with the intent to keep the battery from heating up too much and trigger plating of the cathode. With this mechanism, you can get the battery to hold a greater charge than '100%'. There is no evidence from this image that anything resembling SBC is being employed. The voltage is held pretty constant at 4185, and there are no bursts of high voltage.
 
Maybe SBC wasn't the best term to use. You are correct that it wouldn't be SBC. It still seems like some sort of trickle charging was used though. I'm loving not having the 10% drop off that we would have with the EVO
 
There is 0.00000% chance of any sort of trickle charging going on here.

Anything suggesting otherwise is being misread or misunderstood.

Trickle charging has been verboten for quite some time.

To trickle charge any form of this battery could lead to chemical fire that would burn like a road flare. I am not exaggerating. The flame will shoot to over a foot, like a blowtorch.

I know, I've made it happen under controlled (read: laboratory) conditions.

The phone always runs off of the battery, even while on the charger.
After it hits full charge, the charging circuit shuts down until the battery drops to a certain point, then the charger kicks in again. Lather, rinse, repeat until you take the phone off the charger.

PS - the lithium flame burns predominantly purple with a stunning orange interspersed, and the smoke is quite toxic.
 
EarlyMon said:
There is 0.00000% chance of any sort of trickle charging going on here.

Anything suggesting otherwise is being misread or misunderstood.

Trickle charging has been verboten for quite some time.

To trickle charge any form of this battery could lead to chemical fire that would burn like a road flare. I am not exaggerating. The flame will shoot to over a foot, like a blowtorch.

I know, I've made it happen under controlled (read: laboratory) conditions.

The phone always runs off of the battery, even while on the charger.
After it hits full charge, the charging circuit shuts down until the battery drops to a certain point, then the charger kicks in again. Lather, rinse, repeat until you take the phone off the charger.

PS - the lithium flame burns predominantly purple with a stunning orange interspersed, and the smoke is quite toxic.
Click to expand...

Thanks for the very important call-out on this one. Even I was initially PO'ed watching battery life drop WHILE on a charger until I remembered the type of battery that we are dealing w/ in this phone.

Admittedly, up until yesterday, I would still revert to the old habit of letting the phone fully charge, give it about 10-15 minutes, and then plug it back in until green again just to "top off".

Sigh.. :D
 
pwrmedia said:
Thanks for the very important call-out on this one. Even I was initially PO'ed watching battery life drop WHILE on a charger until I remembered the type of battery that we are dealing w/ in this phone.

Admittedly, up until yesterday, I would still revert to the old habit of letting the phone fully charge, give it about 10-15 minutes, and then plug it back in until green again just to "top off".

Sigh.. :D
Click to expand...

I know right, I went that same route with the original Evo until someone explained it to me. Then I got intrigued, started to talking to a few of my compadres, and after a few beers, we decided to test what we knew (after we were sober and do not try this at home! :D).

More phone and laptop batteries are returned that are perfectly aok because the whole thing about the device usually not being 100% when you take it off the charger (unless you catch it the moment the light goes green) is all perfectly normal and ok.

Phones don't go from 100% to 96% in the first few minutes and then "work ok." The indicator is sort of lost when you take it off of the charger and it takes a few minutes to report the % charge.
 
Today was a little different story, off charger at 9am and still nowhere near what I consider normal phone usage for this time of year, I hit 13% by around 7pm.


2012-06-08 22.27.42 by samurai big ed, on Flickr


2012-06-08 22.27.31 by samurai big ed, on Flickr

I will say I have tons of problems with Sprint, missed calls that never ring on my phone (at least 5 a day), poor signal issues, roaming when I shouldn't be.

On edit: Not sure whether to be happy or upset I am not having my usual high call volume. My business partner is waiting on my results to make up his mind but it has been nice not having the phone permanently attached to my ear lately!
 
Keep it until the LED goes green ... or charge it for a full night ... it really doesn't matter, because your phone has a Li-Ion battery :)

Harry
 
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