Database Users

Battery saving tip

Hey guys pls try this tip for hd2 battery saving, change the charger with the same voltage of output 5v but of 400 or 500 ma instead of 1000 ma it will take more time to charge the battery but will take also less time to drain.
i am currently doing it and my leo gives me 2.5 days instead of 1 day.
pls send feedback

I don't understand how that will change how fast it depletes, surely the lower ma will just slow the charge?
Sent from my HTC Desire using XDA App

khpatwa said:
Hey guys pls try this tip for hd2 battery saving, change the charger with the same voltage of output 5v but of 400 or 500 ma instead of 1000 ma it will take more time to charge the battery but will take also less time to drain.
i am currently doing it and my leo gives me 2.5 days instead of 1 day.
pls send feedback
Click to expand...
Click to collapse
PC USB port max.0.5A(500mA)!!! So there you go, no purchase required, use the cable that came with it and yes, a computer! simples!

geon106 said:
I don't understand how that will change how fast it depletes, surely the lower ma will just slow the charge?
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
what he said.
The current Li-ion batteries don't need a slower charge to complete a charge-cyclus any better.
It'll just charge slower, but still drain as fast as if you would charge per 1000ma.

i mostly use my pc to charge as i usb tether, ive not noticed any difference in battery drain from when i use the mains charge, i also have a replacement charger which does multipole phonesonly rated at 500ma, again ive never noticed any difference in battery drain after charging with that

post in general section and you should post build your using and
winmo rom also radio rom

Sorry OP, you have misinformation and are spreading it.
The capacity of the battery is fixed. Let's say it's 1150 mah. If you charge it with a 500 mah charger or a 1000 mah (or 1A) charger, it can only fill up to 1150 mah.
It's like filling up a gas tank in your car. If you have a 20 gallon tank, you will only be able to put 20 gallons in there. Whether you squeeze the pump half way or all of the way, you aren't going to fit any more than 20 gallons of gas in there.
If you indeed got better battery life, its not from using a "less powerful" charger.

sadly theyr right theres no way slower charge equates to slower drain, ur ussage may have changed.. on a nother note try going in airplane mode when u know ull be hanging around an area with bad service or simply want to turn phone of without actually turning it off. ( THE PHONE uses more battery n resourses triying to find signal or switching from 3g to edge)

Lol physics. As others have posted changing the charger won't do anything but charge slower.
Sent from my HTC HD2 using XDA App

Well, whether it works or not - thanks for the tip.
Things like this are essential to a good forum - and there are gems in some of them.

This is not gonna work. But thanks anyway

T-Mobile HD2 takes too long to recharge the battery

Hello folks, I am very concerned with my HTC HD2 as it takes like over 4 hours to fully recharge the battery. I have got this HD2 from the market here on XDA and it works very good overall, except for this problem when recharging it. I thought it was the charger and I have tried many usb to wall chargers even the the iPhone's 4 one, but nothing has changed.
I have also tried several roms and kernels but nothing has changed on this side as well. I wiped everything and put back win mobile 6.5 T-mobile stock rom, but hey, no difference here too..
I am wondering if there might be something wrong with the phone itself or can it be the battery going in holiday???....
How can I figure this out???
I have downloaded Battery Doctor from the market and it says the battery is in good health, and I get up to 14 hours with a full charge with mytouch 4G rom and kernel rafpigna 1.7 cpu 1.3Ghz OC.
Is anyone else experiencing the same problem ??? do you guys have any suggests ???
This problem is driving me really crazy...

Get a new battery, mine only takes 2 hours when completely dead.

mattfmartin said:
Get a new battery, mine only takes 2 hours when completely dead.
Click to expand...
Click to collapse
You think is the battery?? but I get up to 14 hours of usage, I am not sure if its that good though, but I heard this phone is a sucky battery, and anyways why Battery doctor says the battery is in good health ??
Anyways I was thinking to get the battery extended 2300mah
How many hours does your battery last???

Are you using the original HD2 charger? I have tried many different chargers and they always charge at a different rate. It has to be that, not the battery.

secano said:
Are you using the original HD2 charger? I have tried many different chargers and they always charge at a different rate. It has to be that, not the battery.
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Click to collapse
Unfortunately it came with its original charger broken and I have never had the pleasure to try with it.. Anyways I am using a charger that has the same specs of the original one, which is the usb charger of the iPhone 4, and yea same result ...
I have downloaded currentwidget from the market and it gets less than 200mA of current in, when it usually should get around 400mA, sometimes the value goes down to 200mA as well, which makes me really wonder the problem might be the usb port of the phone .
Does a broken battery does that as well??

Segnale007 said:
Unfortunately it came with its original charger broken and I have never had the pleasure to try with it.. Anyways I am using a charger that has the same specs of the original one, which is the usb charger of the iPhone 4, and yea same result ...
I have downloaded currentwidget from the market and it gets less than 200mA of current in, when it usually should get around 400mA, sometimes the value goes down to 200mA as well, which makes me really wonder the problem might be the usb port of the phone .
Does a broken battery does that as well??
Click to expand...
Click to collapse
I think it has to do with the charger you're using . When I charge mine I usually see anything from 500+mA to 700+mA on my battery monitor widget depending on how much charge the battery has, and like Segnale007 said it usually takes about 2 hrs to fully charge.

Segnale007 said:
Unfortunately it came with its original charger broken and I have never had the pleasure to try with it.. Anyways I am using a charger that has the same specs of the original one, which is the usb charger of the iPhone 4, and yea same result ...
I have downloaded currentwidget from the market and it gets less than 200mA of current in, when it usually should get around 400mA, sometimes the value goes down to 200mA as well, which makes me really wonder the problem might be the usb port of the phone .
Does a broken battery does that as well??
Click to expand...
Click to collapse
I can't say it's the battery cause you say it lasts you 14 hours, usb port? maybe. Your battery is good for it to last that much (on averge usage of course). It's the different charger that you're using.

roloracer said:
I think it has to do with the charger you're using . When I charge mine I usually see anything from 500+mA to 700+mA on my battery monitor widget depending on how much charge the battery has, and like Segnale007 said it usually takes about 2 hrs to fully charge.
Click to expand...
Click to collapse
The charger I am using its the iphone 4 charger and just like the original one its a 100-240V ~ 0.2A 50-60HZ , which I have no idea about what it means, but I can guarantee u its the same ..
So, what charger do you suggest me to buy?? I wish it was everything except the phone ...

Segnale007 said:
The charger I am using its the iphone 4 charger and just like the original one its a 100-240V ~ 0.2A 50-60HZ , which I have no idea about what it means, but I can guarantee u its the same ..
So, what charger do you suggest me to buy?? I wish it was everything except the phone ...
Click to expand...
Click to collapse
That's your issue there, 0.2A (aka 200mA).
The UK HD2 charger for example, is 1A (aka 1000mA).
To work out the maximum time it should take to charge the battery:
(capacity x inefficiency factor) / charging current
(1230 x 1.15)/200 = 7 hours
(1230 x 1.15)/1000 = 1.4 hours

xaccers said:
That's your issue there, 0.2A (aka 200mA).
The UK HD2 charger for example, is 1A (aka 1000mA).
Click to expand...
Click to collapse
Oh gosh, so ur basically telling me its the charger I am using what is ****ing up with the slow charging ???
Can you please point me at a good one???
I am totally ignorant about electricity and stuff like that ...

That charger only delievers 0.2 A which is 200ma , you need at least a 500ma charger, mine is a 1 A ( 1000 ma ) and its quite normal to see a 700 ma rate while charging..
Sent from my HTC Desire HD using XDA App

Segnale007 said:
Oh gosh, so ur basically telling me its the charger I am using what is ****ing up with the slow charging ???
Can you please point me at a good one???
I am totally ignorant about electricity and stuff like that ...
Click to expand...
Click to collapse
Take a look on ebay or any local phone shop/online phone accessory shop.
You want a micro usb charger that has an output current of at least 500mA/0.5A
The original HTC ones are 1000mA.
Blackberry ones I've seen are 700mA so they're good enough.
200mA isn't a problem, it won't damage your battery, in fact it will live slightly longer as it's being put under less stress when charging, but don't use your phone while you're charging with it as you'll be drawing more current than the charger can supply.
So for instance, if you wanted a car charger so you could use the phone as a satnav and talk via bluetooth, you'd need a 1A charger to cope with the drain on the battery.

xaccers said:
Take a look on ebay or any local phone shop/online phone accessory shop.
You want a micro usb charger that has an output current of at least 500mA/0.5A
The original HTC ones are 1000mA.
Blackberry ones I've seen are 700mA so they're good enough.
200mA isn't a problem, it won't damage your battery, in fact it will live slightly longer as it's being put under less stress when charging, but don't use your phone while you're charging with it as you'll be drawing more current than the charger can supply.
So for instance, if you wanted a car charger so you could use the phone as a satnav and talk via bluetooth, you'd need a 1A charger to cope with the drain on the battery.
Click to expand...
Click to collapse
Alright thanks, will let you know

Segnale007 said:
You think is the battery?? but I get up to 14 hours of usage, I am not sure if its that good though, but I heard this phone is a sucky battery, and anyways why Battery doctor says the battery is in good health ??
Anyways I was thinking to get the battery extended 2300mah
How many hours does your battery last???
Click to expand...
Click to collapse
With very, very light use about 55 hrs. That's not extended.

Alright, my dad has managed to temporary fix its original charger and I can confirm there's nothing wrong with the battery and the phone itself. It gets beyond 800mA with the original charger and fully recharge the batter within an hour and half, which is great..
Ok now I have to find a compatible USB to wall charger with the same frequency.
Since its a T-Mobile US HD2 its original charger is american, and since I am in Italy I'd get an Italian standard wall charger. Does the Italian HD2 original wall charger has the same frequency of the american one??
Thanks

xaccers said:
Take a look on ebay or any local phone shop/online phone accessory shop.
You want a micro usb charger that has an output current of at least 500mA/0.5A
The original HTC ones are 1000mA.
Blackberry ones I've seen are 700mA so they're good enough.
200mA isn't a problem, it won't damage your battery, in fact it will live slightly longer as it's being put under less stress when charging, but don't use your phone while you're charging with it as you'll be drawing more current than the charger can supply.
So for instance, if you wanted a car charger so you could use the phone as a satnav and talk via bluetooth, you'd need a 1A charger to cope with the drain on the battery.
Click to expand...
Click to collapse
Couldn't said it better..
Sent from my HTC HD2 Gingerbread using XDA App

I have the same problem but with Htc touch 2(Mega)-I know that this isn't Mega forum but i couldn't find any solution there,so i write here my issue-.It takes too much to charge my Touch 2 (around 9-10 hours) with the AC power.On the charger its writen:Input:100-240~0.3A(0,3A)50-60Hz,Output: 5V-1.0A(1,0A)MAX.DO I have the same problem,I need to change the charger?Thank you!

My T-Mobile's battery recharced 3 ours. not 4 ours or more. My charger is original.is there any problem with my battery

[Q] Battery voltage 4.3V+ after 90%

So I was wondering if anybody knows what the normal battery voltage is supposed to be for this phone?
Because I have noticed that the battery voltage is spiking fairly often at 4.3V or more, when it's charging at 90% charged or above.

current
Which kernel are you using? There is a option to change charging current in some kernels.. check for it using EXtweaks. if so change it to a lower value.. default is 650mA on my s2.

UKROB86 said:
So I was wondering if anybody knows what the normal battery voltage is supposed to be for this phone?
Because I have noticed that the battery voltage is spiking fairly often at 4.3V or more, when it's charging at 90% charged or above.
Click to expand...
Click to collapse
On mine too! I've seen it at 4.3v+ when the battery is at 100% charge

I'm no theoretical electrical philosopher type, but voltage will read higher while you're charging. Your car battery is at ~12V while the car is off (it's a 12V battery), but while the car is running voltage will be ~14V

CMNein said:
I'm no theoretical electrical philosopher type, but voltage will read higher while you're charging. Your car battery is at ~12V while the car is off (it's a 12V battery), but while the car is running voltage will be ~14V
Click to expand...
Click to collapse
Which battery app is that?
Yea it only seems to spike above this when charging above 90% before 90% it never reaches 4.3V. I've set an alarm to tell me when it goes above 4.3V that's how I know.

UKROB86 said:
Which battery app is that?
Yea it only seems to spike above this when charging above 90% before 90% it never reaches 4.3V. I've set an alarm to tell me when it goes above 4.3V that's how I know.
Click to expand...
Click to collapse
Battery Widget? Reborn! <---seriously, that's the name
http://goo.gl/ZaZbR

Are people here with this problem also experiencing the problem of the phone detecting that it's on low power USB charge mode when it's actually plugged into the wall and supposed to be on AC??

Not me, but we don't know that this is a problem.
Sent from my Nexus 4 using Tapatalk 2

Battery Problem

i recently bought a OEM battery for my defy last week
and the problem is that the battery level isn't shown on my device
although the battery bar is 100% all the time
then after 16-18 hours the battery drains automatically, but the problem doesnt ends here
another problem is
i have to charge it through the battery charger or universal charger,
i cant charge it through my phone
(p.s. i have 2 batteries, the other battery gets charged from the phone, but not this one.)
tried 2 different roms
slimkat and AOSPB
any suggestions to my prob ?

try going to /sys/devices/platform/cpcap_battery/power_supply/battery/uevent
and check POWER_SUPPLY_CHARGE_FULL_DESIGN.
if value is at 500 then the circuitry of your new battery is not working properly. it should be atleast 1500

aperture said:
try going to /sys/devices/platform/cpcap_battery/power_supply/battery/uevent
and check POWER_SUPPLY_CHARGE_FULL_DESIGN.
if value is at 500 then the circuitry of your new battery is not working properly. it should be atleast 1500
Click to expand...
Click to collapse
I cant change this POWER_SUPPLY_CHARGE_FULL_DESIGN
my phone is root
?

aperture said:
try going to /sys/devices/platform/cpcap_battery/power_supply/battery/uevent
and check POWER_SUPPLY_CHARGE_FULL_DESIGN.
if value is at 500 then the circuitry of your new battery is not working properly. it should be atleast 1500
Click to expand...
Click to collapse
Do you know if there is a way to solve battery problem because of McGyver trick? I have exactly the same problem, but from another perspective, it happens with any battery, I got one recently and had this problem as well, so I just have the option of charging the batteries via universal charger
Sent from my MB525+ using Tapatalk 2

aperture said:
try going to /sys/devices/platform/cpcap_battery/power_supply/battery/uevent
and check POWER_SUPPLY_CHARGE_FULL_DESIGN.
if value is at 500 then the circuitry of your new battery is not working properly. it should be atleast 1500
Click to expand...
Click to collapse
thanks for the reply
i get this > power supply voltage is 0 :-s

min/max voltage (mV) for original phone battery

Good day, can anyone tell me the minimum and maximum voltage (mV) for original phone battery? Not the specs of the battery but from your actual usage.

With stock battery and bcharger, around 900 ma. In discharging the values is between 90 and 350 ma or 3,8 mv.
Sent from my SM-G928F using Tapatalk

MoHuToP said:
With stock battery and bcharger, around 900 ma. In discharging the values is between 90 and 350 ma or 3,8 mv.
Sent from my SM-G928F using Tapatalk
Click to expand...
Click to collapse
So do you get a constant flow of 3800 mV?

First of all why do you ask?
It's not tied to battery but in kernel settings (max Voltage).
If you have problems with not constant voltage it's probably charger/cable related.

Zola III said:
First of all why do you ask?
It's not tied to battery but in kernel settings (max Voltage).
If you have problems with not constant voltage it's probably charger/cable related.
Click to expand...
Click to collapse
Im trying to figure why my phone drains from 40% - 0% in seconds.
I've tries different charge and cables.
4312mV is my max and phone flickers and switches off if mV drops below 3500mV.

zigbye82 said:
Im trying to figure why my phone drains from 40% - 0% in seconds.
I've tries different charge and cables.
4312mV is my max and phone flickers and switches off if mV drops below 3500mV.
Click to expand...
Click to collapse
V max you have is OK.
Frankly I don't know what's going on in your case and I had all kind of ****s happening to me with this phone regarding charging (buried 2 original chargers, couple of cables, had my phone USB port ****ed up & replaced & on a second battery right now). What I do know it's that battery charging logic is totally ****ed up (by Samsung) on the kernel side. I suppose that you are on CM 12.1 (or some of its derivatives)?
If you are try a new Nikolas kernel (rev 2) as from rev 2 their is a new charging driver that we hope it will resolve charging logic problems. Naturally wipe all (except data) when you flash it.
Best regards.

Yes I'm using n1kolaa ROM and kernel. But on other build my phone would have just switch off around 30-40% but on his kernel it would drain fast from around 40% but I would see the "phone is shutting down" dialog now.
In using a 1 month old battery and I suspect that it may be a fake but I bought it from a Samsung store.
Thanks for the info.

zigbye82 said:
Yes I'm using n1kolaa ROM and kernel. But on other build my phone would have just switch off around 30-40% but on his kernel it would drain fast from around 40% but I would see the "phone is shutting down" dialog now.
In using a 1 month old battery and I suspect that it may be a fake but I bought it from a Samsung store.
Thanks for the info.
Click to expand...
Click to collapse
It's a habit of the Samsung battery that it have asymmetrical discharge, it starts to go down faster at 50% & last 15% drains really fast.
It's possible that it's bad battery or faked one.
I bought Anker replacement one & I am satisfied with it, it doesn't last longer but it discharges much more symmetrical to the last 20%...

After a lot of research I ordered an Anker 2200mah yesterday. hope that it performs better than this one.

zigbye82 said:
After a lot of research I ordered an Anker 2200mah yesterday. hope that it performs better than this one.
Click to expand...
Click to collapse
A little lazy on getting NFC on other than that it's good.