Database Users

battery metter unreliable

i have noticed that the battery metter is completely unreliable
for example it shows 28% left (btw, i installed FInixNOverBattery for percentage indication) and after a soft reset it shows 41%
or it shows 50% and after soft reset it shows 31%
in this way i can never estimate how long the battery will last
does anybody faced this issue? any solution fot it? (i also tryed to calibrate by completely drain the battery followed by complete charge withe the device turned off)
thank you in advance!

noris08,
it is completey normal to experience big jumps in % after a reboot. The battery % is just a representation of the actual voltage of the LiPoly battery, which usually recovers (rises) quite a bit when there is no load on the battery (even for a short time).

maybe what you say it is true, but i never experienced this behaviour with any of my previous phones. and i had a few, including wm for a few years
and variations of 10-15% - i find them too big

I noticed the same thing. Any explanation for this? Or it is just that FInixNOverBattery is not reliable/compatible/accurate ?

Voltage may vary/jump around due to environmental changes and power consumption or voltage sensor may be insufficiently accurate to provide reliable voltage readings for 1% steps. This is one of the reasons why many battery drivers in WM only provide remaining charge percentage in 10% steps.
In this light, voltage on its own is not a sufficient indicator of remaining charge percentage. Other parameters, such as voltage deviation and other factors, such as power consumption and temperature may need to be taken into account to obtain a more accurate evaluation.

Battery does not charge properly when D2 is off

Hi,
I noticed the following problem on my Diamond 2:
If I turn off the phone for night charge it never shows green in the morning.
The only way to see that amazing green light is to charge the phone whent it is turned on.
Of course I applied the latest hotfix - no use for the off mode charging. And of course I wrote to htc - will not waste your time repeating their suggestions.
And I am not happy with my phone battery life - it hardly endures one working day - lets say - 10 hours...
ROM - Official, yet.

orlean said:
Hi,
I noticed the following problem on my Diamond 2:
If I turn off the phone for night charge it never shows green in the morning.
The only way to see that amazing green light is to charge the phone whent it is turned on.
Of course I applied the latest hotfix - no use for the off mode charging. And of course I wrote to htc - will not waste your time repeating their suggestions.
And I am not happy with my phone battery life - it hardly endures one working day - lets say - 10 hours...
ROM - Official, yet.
Click to expand...
Click to collapse
I never turn my phone off so the green light problem never arises. However I will check and see if occurs.
As for battery life, you will need to give it a few weeks of use before you see maximum battery life.
Make sure you don't continually discharge the battery (better still keep it charging whenever you can) and you should see improvement over time.
Unlocking and replaceing the ROM can also have a significant effect on battery performance as does the Radio version in use. That's going to need some work on your part but the improvements are there to be had.
Some apps that are in common use are also power hungry and can cause a significant drain on power.
And if you install your apps to mem card then again that uses more power than installs to phone storage memory.
You can also turn off any unused background apps and processes.
Only turn on Bluetooth and WiFi when needed.
All these things help.
Personally I carry a spare standard battery with me at all times and strangely since I bought it I haven't needed to us it. The placebo battery effect?

Thanks for the answer.
About the battery usage conseption:
You suggest that I plug my phone each time when possible?
I thought that as the battery has XX recharges according to the specifications it is not good to charge each time whenever you got AC or USB access
I started to follow your recommendation anyway.
For example however - my laptop is never (when possible) with battery in it. I use the battery only when necessary, becasue in the user manual is written that has 300 cycles of recharging. And I always wait until completely discharged before charging. That is how I began treating the Dimond, too.

orlean said:
Thanks for the answer.
About the battery usage conseption:
You suggest that I plug my phone each time when possible?
I thought that as the battery has XX recharges according to the specifications it is not good to charge each time whenever you got AC or USB access
I started to follow your recommendation anyway.
For example however - my laptop is never (when possible) with battery in it. I use the battery only when necessary, becasue in the user manual is written that has 300 cycles of recharging. And I always wait until completely discharged before charging. That is how I began treating the Dimond, too.
Click to expand...
Click to collapse
With Lithium Ion batteries the "quoted" numbers of "rechage" is is an approximate equivalent to give some idea of life expectacy.
It's a hangover from the old NiCad battery days and is not really very helpful when applied to Lithium Ion usage.
The most important aspect of LIon is it's ability to hold it's voltge at max current for longer than other technology. It does this best when well charged and maintained at near max as possible as often as possible. The downside is it's life expectancy which does deteriorate over time.
If you require max daily useage then max charging whenever possible will give you this and you will have to accept that the battery will at some point loose it's charge retaining capabilities and will have to be replaced.
For most of us that's the most important thing.

This is not a battery issue, I believe that this is a software one.
I noticed this morning, having left my phone on charge, and 'off', all night, that the indicator light was still red. When I switched on the phone, it showed only 80% charged.
Having seen this before, I carried out a soft reset, the battery indicator then showed fully charged.
So the battery is charging fully, but the battery charge indicator is showing less than that.

[Q] Isn't a battery still a battery, regardless of OS?

I was just wondering about the whole deal with wiping the battery stats. To me it seems as if the point of this is strictly to get the OS to report and understand the battery more so than anything to do with the battery itself. I mean, the OS can't actually change the physics of the battery, right?
But the OS needs to understand what a full charge is and what an empty charge is, so that it knows when to shut down and when to stop charging and all that sort of stuff.
What I'm thinking is that if you wipe the stats and it's not at 100%, it will think that the discharge from that point to an actual low level is the full breadth of charging and adjust accordingly.
Is any of this remotely accurate? Or am I just making wild assertions?

Actually...it's the software that can make or break battery life...take for example background notifications. Wifi uses battery power and if you have different programs all polling for updates at x amount of times per hour..even when asleep..it will eat up battery juice...another example is the cm bug that kept the speaker on all the time and the nook never really went to sleep...it used tremendous amount of juice for not doing anything...another example..screen brightness..does not the software control how dim or bright you want it...and say you could not adjust the settings..your right..a battery is just a battery but how the kernel, drivers and loaded programs determine how fast or slow the battery power is to be used. Clearing the stats gives more accurate measurements for the kernel and hence will power down(power saver mode ) or other items for the kernel depending on what type of governor is on the nook..software wise.

I think you misunderstood what I was saying. What I'm trying to say is that the OS can't change the physics of the battery. Drain is drain, no matter what software is running. In other words, say you have two perfectly identical systems, both running the exact same software. The battery capacity is exactly the same on both and they both have the same drain. The battery doesn't actually drain faster on one vs the other, but the OS can *think* it's draining faster. That's why we have all these battery stats and such...right? Or am I wrong?

Oh Ok...you are right in the fact that it cannot and the software..depending on what it's state(charge level) is will determine how to run..it just makes it more accurate.

Wiping the Battery Stats tells the OS to start learning what the new High and Low are.
It doesn't matter what level of charge the battery has when you do this....
- As the battery gets lower the stat keeps updating the level as the new low.
- As you charge the battery it continuously updates the stat as the new High.
Once you have taken the battery to both of these extremes then, in theory, the OS will have accurate info on your battery.
At a certain point in time the battery stats stop updating which is exactly why it is important to do this.

[TIP] Battery Backup and Drain

Tip On Battery Drain
Hello Everyone...
Most of us move to Custom Rom’s For various purposes it can be new features, Andriod Upgrades etc But the most common is reason is battery backup which is poor in Stock when Compared to Custom ROM’s.
There are actually 2 ways by which we check battery Stats :
1) Stock Battery Monitor
2) 3rd party App
And we note down the battery performance for hours or a day.
Some people feel that your device is not yielding good battery just because the battery monitor stats show it, you might be wrong in your judgement as most such apps sometimes lie to us.
Remember that with any new ROM is installed on your Android device, you will (In some cases may not) discover battery drain. And these issues for the most part are due to process of your phone’s new software and battery sync.Remember whenever you Install new ROM your device and its hardware will try to adjust to software has well has your battery too which is called caliberation.
It usually requires 3-4 full-charge and discharge cycles before things go to a normal state and Exact battery backup information is known.after this, you will notice great improvement in battery performance. So, do not be quick in concluding anything about battery.
Let the battery calibrate and while you wait try one more thing. Avoid putting your device into charging mode frequently. Turn off the phone, plug charger, wait till it is fully charged and never use mobile while charging since it Reduces battery life has it charges has well has discharges too. Then use it till it is fully discharged. Repeating this several times will improve the battery-life of your device. I have tested it and it really works.:laugh::laugh:
Hope This Helps You All...
Any More Suggestion Feel Free to post in Reply Section.

+1....has always been on stock cable and adapter....and has tried not to charge the battery unless it is around 30-35 %. Once in amonth, i do a complete discharge and charge.
Has installed only required apps to be used regularly.( thats personal choice though ).
so yes till now my battery performance has been very good.....:good::good:
On RR 5.1.3 with nebula kernel 3.12..dalvik runtime....

[Q] Instant Battery Drop from 10% to 0%

Hey guys ,
I have a Note 4 N910F. I can't say I'm impressed with its battery life (coming from LG G3) but it lasts from the morning till I go to sleep on med-high use which is fine.
The problem that I experience though, is that if I "heavily" use my device when the battery reaches 10% - i.e. the GPS and the Data Connection turned on and Google maps are being used, the phone suddenly shuts down. I need to put it on a charger to turn it on and the battery is 0%.
I will post a screenshot as soon as I can.
Do you think this might be related to a hardware issue ? Or is it just the battery ?
I've tried to calibrate the battery but didn't help.
thank you!

Snake_A said:
Hey guys ,
I have a Note 4 N910F. I can't say I'm impressed with its battery life (coming from LG G3) but it lasts from the morning till I go to sleep on med-high use which is fine.
The problem that I experience though, is that if I "heavily" use my device when the battery reaches 10% - i.e. the GPS and the Data Connection turned on and Google maps are being used, the phone suddenly shuts down. I need to put it on a charger to turn it on and the battery is 0%.
I will post a screenshot as soon as I can.
Do you think this might be related to a hardware issue ? Or is it just the battery ?
I've tried to calibrate the battery but didn't help.
thank you!
Click to expand...
Click to collapse
Next time you should search first as there is another thread discussing about this.
But I will still answer your question.
It's your battery deteriorating.
It seems that your battery can only hold 90% of the original capacity.
Li-Ion/poly battery WILL deteriorate over time & it can deteriorate faster without proper care.
How to prevent faster battery deterioration:
Avoid heat.
High temperature is the worst enemy of any lithium based battery.
Never let your battery reach 0%
Reaching 0% means longer charging time = more heat exposure while charging
Avoid putting your device/battery on the dashboard during sunny day.
Do short charge multiple times a day.