[Q] Users of Battery Monitor Widget (BMW): What is your reported battery capacity?

[forcemaker]

Hi there,

I am hoping that there are some "Battery Monitor Widget" (BMW) users with us, and that you would share your values which BMW is detecting.

As far as I understand and can tell the Transformer does not report measured mAh values and BMW does some estimations and calculations by monitoring over a long time.

After a month or so my TF101G showed an estimated capacity of 23614 mAh ... you get it that I am confused. Therefor I am asking you to post your values, eg. with a screenshot of the "Calibration" page of BWM.

As far as I can tell, nobody has posted these values, at least not @XDA. So this would really be interesting, maybe also for 3c (author of BMW).

Greetings,
- Stephen

 

[forcemaker]

"Bump"

Really no one willing to share their battery's capacity as reported by Batter Monitor Widget (BMW)?

 

[cetindk]

Really no one willing to share their battery's capacity as reported by Batter Monitor Widget (BMW)?

Hey man, I'm not much of a pro of this widget, i downloaded it yesterday but may I ask, in your Settings-Monitoring-Battery Capacity(mah), what is written there exactly?

 

[farsight73]

Installed it on my Motorola Defy and it work superbly... But in my TF101, it doesn't seemed to show the details I expected.
The battery capacity, what do you enter here? Is the BMW detect the dock battery?
I'd run it over two days but the data shows doesn't seemed to be right, so uninstalled it..
If you have any proper steps or ways to make it work in TF101.. please write here.



Sent from my Transformer TF101 using XDA Premium HD app

 

[cetindk]

In battery capacity option, you write your battery mah as you know it. I got extended 3500 mah so I wrote 3500 there, measured the mah with the app using the app for a day, it said 4580 mah. Well, there is no way that is right
I'm gonna use the app for some day, see if the measured mah is gonna change.

 

[forcemaker]

The app can not read the externals battery, it seems to be totally unaware. It also seems to register any power from the keyboard dock's battery as an external charger.

As the TF101 does not report measured mAh values as other devices do (e.g. my HTC Desire Bravo A8181) it uses estimates from the OS system logs (as far as I understand).

The app's author suggests - at best - a maximum complete discharge/charge cycle for guessing accurate values (maybe it's the other way around: first fully charge, then discharge; or it doesn't matter; but: do no discharge your Li-Ion battery completely as this is known to harm Li-Ion's (e.g. batteryuniversity, dont know their reliability), try at least a charge cycle of 50%)

It took quite some time until my mAh value stabilized at the value of 23614mAh that I got. For about 2 weeks the value was rising and stopped then at 23614mAh.

Yes, as I remember the mAh-value you are asked for at e.g. the first use is an estimation/hypothetical temporary value used for calculations and which will be corrected with the measured/estimated values over time.

The app and it terms are in some cases confusing/unclear without reading the docs which can be found here and are quite enlighting. In general I use this app a lot on my Desire where it measured the battery's capacity with 14xx mAh which is a little more than the expected capacity claimed by HTC (and I treated my battery quite well).

About the capacity of an Asus TF101(G): I left my tablet running under these cirumstances (the first time accidentially, the second time planned):

• flight mode on (no 3g, wifi, bluetooth, me telling you just because you can enable the latter two even in flightmode!)
• screen set to lowest value
• no apps except battery monitor run on purpose (background tasks left untouched)
• OS 3.2.1 stock ROM completely untouched (only the OTA which gave me this OS version)

The results of this test:

• from 100% battery to 8% battery within 8 hours 20 min
• the battery usage screen of Android control panel showed following "distribution" of power:
  • Screen: 86%
  • Android OS: 11%
  • Android System: 3%
  • no other entries!

My (quick) conclusion of this test is: as Asus promotes this device with about 8 hours of HD video playback (which I expect to be a processor sucking task) on one charge, without keyboard dock, and as other sites with this' tablet reviews report the same, my device underperforms "highly".

(Sorry, I did not start reading the - for sure - existing threads about battery life in this forum, as I "hoped" that a simple comparison of "Battery monitor widget" values would enlighten me. But, for sure I have to dive into these discussions.)

Uploaded images (thumbnails below) may be unreadable and are posted here for your convenience:
http://imgur.com/a/FJ2Xx#2