Database Users

Is the memory erased if the battery drains completely?

Excuse me it might sound dumb, BUT I had a year ago a Qtex 2020i and they said that if the battery ran out completely I would have lost all the data , kinda like a hard reset. Is this still an issue on the Hermes? I guess not, but I have to be sure, as I wanna do some power cycles to optimize the battery life. And this implies draining it completely....
So, is it safe for my data? Or I would lose it , like on the 2020 i?
Thaks

No it won't erase the memory.
Do current batteries still need conditioning? I've never conditioned one...
V

Yes I myself prefer to do that with all my new batteries (I used many many smartphones) so that I can achieve its maximum potential. At least it works for nokia batteries...

WinMo 5 has persistent storage so any device with it should be ok.
Do current batteries still need conditioning?
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I think I read somewhere that lithium ion batteries don't have any 'memory effect' and therefore don't need conditioning.
Could be wrong though...

if u read even the nokia manuals...u will KNOW that you are wrong.... I dont do that to avoid the memory effect, BUT to get the maximum performace from the batery.

vijay555 said:
Do current batteries still need conditioning? I've never conditioned one...
V
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Nope. See http://www.batteryuniversity.com/partone-12.htm :
"Lithium-ion is a very clean system and does not need priming as nickel-based batteries do. The 1st charge is no different to the 5th or the 50th charge. Stickers instructing to charge the battery for 8 hours or more for the first time may be a leftover from the nickel battery days. "

It is not about the charging time.......It is about the power cycles... I am not very clear I guess..... Believe me , I am right..)

battery, battery and less battery.

Uptime: 2hours 27minutes and x amount of seconds and dead.
did I break the record for stress testing it?
Anyways, anyone got any tips on battery life? I was thinking of getting 3000mah or 3500mah, but the design of it (bulky) just doesn't seem the right option in my mind.
Also anyone here actually have the 3000mah or 3500mah so they can chime in on the design + battery life compared to the original?

just powered the phone back up. and it says battery is at 50%. wtf.
It turned off on its own cause of low battery, and now it says 50%?

E-gad the ghost recharge strikes again.

I had the same thing happen this morning. Woke up to a dead phone, plugged in, boot ed and battery showed around 70%... Go figure
Sent from my PC36100 using XDA App

I am trying batteryfu this week from market and got 15.5 hrs with 5% left today. Give it a shot, it is free. Moderate user.
Ian B

search the thread i found a topic on battery life and was gonna try it tomo..... about turning the phone off charging for 8 hours then on for an hour..... its a few steps worth a shot..... in the mean time i would deff do a factory reset....will deff help

Last-Chance said:
just powered the phone back up. and it says battery is at 50%. wtf.
It turned off on its own cause of low battery, and now it says 50%?
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Battery may not be calibrated correctly. I have to say my only major disappointment with the EVO is how the battery life is so tied to the particular rom I'm using. I mean I expect different drain rates on different roms, but having to recalibrate the battery every time I switch roms is just plain dumb.

Mr Ian B said:
I am trying batteryfu this week from market and got 15.5 hrs with 5% left today. Give it a shot, it is free. Moderate user.
Ian B
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downloading now. Juice defender didn't really do anything for me. 1.20x the normal battery, well thats what it says anyways. thanks
Nismo-b15 said:
search the thread i found a topic on battery life and was gonna try it tomo..... about turning the phone off charging for 8 hours then on for an hour..... its a few steps worth a shot..... in the mean time i would deff do a factory reset....will deff help
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I'll try that as well, thanks
sk63 said:
Battery may not be calibrated correctly. I have to say my only major disappointment with the EVO is how the battery life is so tied to the particular rom I'm using. I mean I expect different drain rates on different roms, but having to recalibrate the battery every time I switch roms is just plain dumb.
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Sorry for the noob question, but how do you recalibrate the battery?

Last-Chance said:
downloading now. Juice defender didn't really do anything for me. 1.20x the normal battery, well thats what it says anyways. thanks
I'll try that as well, thanks
Sorry for the noob question, but how do you recalibrate the battery?
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Juice defender did not do it for me either. I got 1.58 but too many things were turned off to get there. What is the purpose of a smart phone if everything has to be turned off to save battery.

Mr Ian B said:
Juice defender did not do it for me either. I got 1.58 but too many things were turned off to get there. What is the purpose of a smart phone if everything has to be turned off to save battery.
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It used to work for me, but now it is doing the same thing. Im at 1.76 now but for the past week it was stuck on 1.00, then slowly went up with each flash.

just a quick update. The reason the battery showed empty one minute and then it showed 50% the next was because of the heat. The phone was very hot when I was playing with it, and then when it cooled down it seemed to have fixed itself or w/e. Happened again today.

im sure its been answered..but how do we calibrate the battery?

Pretty sure you can erase the battery stats through clockwork recovery. Also there is a way through ADB which is pretty easy too
Sorry I don't have any links atm.

Charge for first use?

Hi.
I've seen lots of advice in several different ways about charging new tech when you get it.
So I thought I'd try a poll to see what the general consensus is.
1) Charge until light is green before turning it on the first time?
2) Turn on without precharge, but then run completely flat before charging
3) It's a Li-ion battery and it makes no difference
Thanks

SnakeManJayd said:
Hi.
I've seen lots of advice in several different ways about charging new tech when you get it.
So I thought I'd try a poll to see what the general consensus is.
1) Charge until light is green before turning it on the first time?
2) Turn on without precharge, but then run completely flat before charging
3) It's a Li-ion battery and it makes no difference
Thanks
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Many people will tell you it doesnt matter but I know from experience that it does in fact make a difference. When I got my phone (mt4g) I starte using it right away without charging it, everything seemed fine I had an issue with the screen so I exchanged it and got a new one. This one I charged first for a few hours before even turning it on and it did make a difference. my battery seemed to be holding a charge for longer. When I got another battery I read they recommend charging it fully off for at least 8 hours then when you do power it on let it run down all the way. Do that for the first 5 charges and it will help your battery health in the long run.
Another example is my friend got two of the same phone one for him and one for his gf. He started using his as soon as he got out of the store, hers he charged for her because he didnt see her that night. He said the phones are pretty much set up identically, same software, same services running etc.. and he said her battery lasts noticeably longer than his

graffixnyc said:
Many people will tell you it doesnt matter but I know from experience that it does in fact make a difference.
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Thanks for the input. Ya, I have heard a lot of stories like yours.
And even if it doesn't always make a difference, it's only 8 hours, so it should be worth it just to make sure, but when you've been waiting since January for an android tablet and you finally get one in April, 8 hours is forever. ha ha
Thanks

Oh, I suppose another related question is how much is fully charged? Apparently modern devices have a current regulator or something in them that stops it from charging past 95% or something? Not sure on specifics, but from what I've read. You can't charge it passed when the green light comes on anyway?
Anyone know more on this?

SnakeManJayd said:
Oh, I suppose another related question is how much is fully charged? Apparently modern devices have a current regulator or something in them that stops it from charging past 95% or something? Not sure on specifics, but from what I've read. You can't charge it passed when the green light comes on anyway?
Anyone know more on this?
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Many new batteries will charge to 90% or 95%, then display the light as "fully charged". They will continue to to charge to 100%, drain back down to 90%, and back and forth in order to not stick at full 100% (aka charging over night).
That being said I've heard a lot of talk about conditioning smartphone batteries etc. and for the most part I haven't seen a lot of evidence to prove that it is necessary. Lithium Ion batteries really don't need conditioning or anything as much as you'd think... that's really an old NiCad thing to do.

I did not charge mine when i first got it, the battery was already at 90% about and i simply used it for a day and a half and now i'm charging it for the first time. i regularly get new electronics devices and i never have better problems personally. battery tech has come up a ways in the last few years.

It's well known by now the Li-ion batteries do better with short, more frequent charges. It is not a good idea to run it down until dead. These batteries also do not have a "memory."

Placebo and old habits keep this myth around.
Sent from my Xoom

I got my Xoom wifi and plugged it in and turned it on. Couldn't wait any longer.
It's an awesome tablet and the battery lasts all day, with constant wifi and playing.
Thanks for the advice guys

MikeyMike01 said:
Placebo and old habits keep this myth around.
Sent from my Xoom
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Well said. Alas, no matter what a sound scientific methods proves some people just won't listen...

I used it right out of the box and have no issued

Thanks for posting this - timely reminder to check up on the latest info on li-ion batteries (given I will be getting my xoom tomorrow).
Here is a summary on lithium ion:
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Appreciate if anyone finds other links that explain it even better but are also as reliable.

I thought of this thread. It's for N1 but if you have some spare time, tons of information in that thread...
http://forum.xda-developers.com/showthread.php?t=765609&highlight=battery+calibration

[Q] MT4G Battery problems

Hi all,
I have a MT4G running cm10.1. Prior to this, I was running toasted marshmallow's latest build.
Over the last week or so, I've been having some real problems with the phone. While in my pocket, it will discharge rapidly and switch itself off within a couple of hours of being off the charger. Other times, it will read a high battery percentage (80-90%) but will switch itself off randomly. When I go to switch it back on, the battery percentage reads 1%, and it switches off again soon after. If I try to switch it on again, it doesn't make it through the load process before switching off. It seems like the battery is completely discharged.
But (and here's the weird part): if I stick it on the charger, give it a few minutes, then switch it back on, the battery percentage will read 58% (both times I've checked this, it was 58%), and will then charge from there. It stayed on for the rest of the day when I took it off the charger (at 65% charge).
Edit: I though this might be a battery contact/connection problem, but shaking the phone / playing with the battery cover doesn't seem to bring it on. To be safe, I used a pencil eraser on the contacts and have a small piece of card in between the battery cover and the battery, to give more support to the battery. No reboots so far, but it's only been an hour or so.
So:
- is my battery dead, and can this be fixed by a replacement?
- is battery calibration needed (I know this is a controversial question; the consensus seems to be it does nothing)
- Is this more likely a hardware problem with the phone? I have noticed that the charger microusb cable does seem a looser fit compared with before, but since the battery was still charging I figured it wasn't a problem
Thanks for any help troubleshooting this!
Lee

Sounds like your battery is done...replacements are cheap...

What he^^ said.
Anker batteries are good and very inexpensive. Also, "calibration" does nothing. Just flash ROMs on a full charge and call it good.

estallings15 said:
What he^^ said.
Anker batteries are good and very inexpensive. Also, "calibration" does nothing. Just flash ROMs on a full charge and call it good.
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Thanks for the replies - new battery on its way.
Lee

ROM
lee_alkureishi said:
Thanks for the replies - new battery on its way.
Lee
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Try to constantly check your what things are draining your battery, sometimes it could be the phone's data or it could be the sleep(idle) state of the phone, it could be many things. I tend to be always aware, check and read all the possible outcomes for the battery drain. For me is usually maintaining the data on my phone turn ON.

I have been having the same issue with my 10.1 ROM. It's not that old of a battery either so I don't think that it is dead; is there any other advice other than purchasing a new battery?

HOOAH.Brown said:
I have been having the same issue with my 10.1 ROM. It's not that old of a battery either so I don't think that it is dead; is there any other advice other than purchasing a new battery?
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Switch ROMs and compare battery life? Also, check out Better Battery Stats. It can help you track down what causes drain.

estallings15 said:
Switch ROMs and compare battery life? Also, check out Better Battery Stats. It can help you track down what causes drain.
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This is the third ROM (starting from an ICS ROM) and the battery life is the same so I know it's not the ROM. Thanks for the app recommendation. I am afraid that I might have a defective battery.

As it turns out my battery has now started to leak and swell. I am going to purchase a new Anker battery. Thanks for all the assistance.

Battery Issues

I bought a used Note 4 a few days ago which I've been greatly enjoying using. However it has been behaving rather oddly.
It turned off a couple of times, and at first I thought it was random, but then I realised it was turning off at around 20% battery. It wouldn't turn back on until I plugged it in, but when I did it would tell me that I had ~20% battery left. I then realised that it wasn't letting me charge past ~80%.
I tried calibrating the battery using *#2882# (code may from memory so may be incorrect. I think I then allowed it to drain and was delighted to see that it could get to 0% normally. I attached it to the fast charger, it then quickly reached 80% and then slowly progressed past to reach 100%.
However today (the first trip into the world after the first successful 100% charge) it reached approximately 30%, died like before and then when I plugged it in it said it had 11% battery. The battery usage graph will illustrate my point.
Any ideas anyone?

DavidT3 said:
Any ideas anyone?
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Buy a new genuine battery (preferably direct from Samsung), or get an Anker or PolarCell, sounds like your battery is past its best.

Kinsman-UK said:
Buy a new genuine battery (preferably direct from Samsung), or get an Anker or PolarCell, sounds like your battery is past its best.
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That is something I intend to do, but I've read accounts of similar behaviour and a new battery didn't help.

DavidT3 said:
That is something I intend to do, but I've read accounts of similar behaviour and a new battery didn't help.
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Yes, but it's a used phone, so:
a) you have no idea what the battery has been through or how it has been treated
and
b) you can't be sure it's even a genuine Samsung battery, it could be one of the very convincing fake replacements.
So first thing to try is a genuine replacement battery. If it doesn't make any difference, then at least you have a new one (which will always be better) and a used spare.

Kinsman-UK said:
Yes, but it's a used phone, so:
a) you have no idea what the battery has been through or how it has been treated
and
b) you can't be sure it's even a genuine Samsung battery, it could be one of the very convincing fake replacements.
So first thing to try is a genuine replacement battery. If it doesn't make any difference, then at least you have a new one (which will always be better) and a used spare.
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But equally, I don't want to spend money on a phone I may have to send back. Though I suppose based on my current experience I certainly would want another note 4