Database Users

[Q] What is my actual mAH on my new battery

Hi.
I recently bought a new Fat battery for my desire. It promises to deliver 2600 mAH but i have my doubts...
First of all, only the voltage is printed on the battery itself.
Second, I experience worse uptime than on my original 1400 mAH battery.
Third, I guess Iam just sceptical by nature.
So my question: Is there an app out there that will display max capacity?
Or do I really have to measure it with a multimeter?

Hearnz said:
Hi.
I recently bought a new Fat battery for my desire. It promises to deliver 2600 mAH but i have my doubts...
First of all, only the voltage is printed on the battery itself.
Second, I experience worse uptime than on my original 1400 mAH battery.
Third, I guess Iam just sceptical by nature.
So my question: Is there an app out there that will display max capacity?
Or do I really have to measure it with a multimeter?
Click to expand...
Click to collapse
the only way to measure precisely is using an app called
battery monitor widget
have it measure the current and voltage every 60 seconds
fully charged ur volatge suppose to be at ~4.2V with either battery
the drainage suppose to be the same at screen off
lets say ur phone drains 9mA steady
u should see the voltage sinking slower on the higher capacity battery
i would give it an hour or 2 hours on each battery to check the result
example:
1400mAh battery
steady 9mA current over 2 hours from 4200mV down to 4150mV
2600mAh batter
steady 9mA current over 2 hours from 4200mV down to 4175mV
hope it helped^^

https://market.android.com/details?id=com.digibites.m.sysmon&feature=search_result
This shows the mAh.

if you brought the £13 one made in China from ebay (like I did) then it's a total fake the stock battery lasts longer, the only good thing about it is because the back cover is that much thicker you can rest it on it's side to watch movies etc...!

beanbean50 said:
if you brought the £13 one made in China from ebay (like I did) then it's a total fake the stock battery lasts longer, the only good thing about it is because the back cover is that much thicker you can rest it on it's side to watch movies etc...!
Click to expand...
Click to collapse
That's true. Better to buy the original.
Sent from my Xoom using Tapatalk

[Q] How to re-calibrate battery?

Hi all,
I bought a new battery for my HD2 which has 3.400 mAh. Unfortunately the HD2 does not seem to notice the higher capacity.
Battery.exe from htc testing tools shows "FULL (mAh): 12296". As all values are times 10 (like 786% battery right now) I read this as 1230 mAh battery capacity the device thinks to have.
How would I recalibrate the device so it recognizes the new battery capacity?
Thank you, Franky
P.S. I tried to search but found nothing I had'nt already tried. Most people suggest something like this:
1. discharge fully until the phone shuts down by itself
2. remove battery and wait ~1 minute
repeat 1) and 2) until the device shuts off within minutes after being switched on
3. charge completely with the phone OFF until the green light is lit
4. remove battery and wait ~2 minutes
which I tried at least 5 times. I even bought an external charger so the battery is 100% full when put into the device.

Is it a genuine battery, bought from a reputable dealer? I bought a ' genuine' battery from an Amazon seller which was a bad fake, got very hot and only have half the capacity it should have.
If you are using battery in WinMo then I thought there was little to do, in Android there are several tricks but essentially charging with the phone off should give you a full charge.
Have you tried using the phone until it switches off? It might be that you have the extra life but your software doesn't recognize it.

Thanks for your reply!
boomboomer said:
Is it a genuine battery, bought from a reputable dealer?
Click to expand...
Click to collapse
Dunno. All dealers pretend to be (the only) serios. But it's a German dealer /w good ebay ratings.
boomboomer said:
Have you tried using the phone until it switches off? It might be that you have the extra life but your software doesn't recognize it.
Click to expand...
Click to collapse
That's the issue. When the phone shuts down (unfortunately it does that silently, not like a Nokia) and I remove the battery (wait some time) and re-insert it it is at 50% and lasts a few hours more (BTW: doesn't work a 3rd time).
How to tell the software/phone it got a better battery?
BTW: It's WinMo 6.5.5
Thanks, Franky

The phone should only shut down when the battery reaches a certain voltage, or the battery shuts itself off to protect the cell. It sounds like your phone is working properly by turning off due to low voltage, but then when the voltage rises (when you rest it) restarting. The battery protector circuit would not allow it to start for a second time.
You can try using battclock to check your voltage, which should be 4.206 when fully charged and down to around 3.2 or 3.6 when empty. But I think you have a fake battery that simply will not contain that much power - it is a double thickness one, with a bulging battery cover required?

Hi boomboomer,
private talk, he?
Yeah, the battery is a double thick one with extra cover.
Battery.exe showed these values when I got 1% battery left:
MS percentage: 1%
PA percentage: 1%
ACR (mAh): 83 (i.e. 8 mAh)
1st dis_ percentage: 150%
V_MBAT (V): 3.742
after removing the battery and setting it in again after 5 minutes I got these values:
MS percentage: 47%
PA percentage: 47%
ACR (mAh): 5776 (i.e. 578 mAh)
1st dis_ percentage: 470%
V_MBAT (V): 3.747
Regards, Franky

If you notice the voltage reading stays the same for both instances, 3.742 V which isn't far off shut down value for the phone. What is changing is the current value, which if the voltage is constant means the battery resistance is dropping after you rest the battery for 5 mins, or letting the cell cool down and hence giving the impression that the cell still has 47% capacity - which it does not.
A high internal cell resistance means high temperatures and a very short life span, a genuine battery should have a fairly constant resistance and hence linear discharge.
Bottom line is your ebay seller did not send you a battery capable of providing 3400mAh, it may also not be safe to use in your phone in certain conditions e.g. a hot sunny day on your car dash may result in a breach of the cell membrane and even a lithium fire.
I would advise returning the battery for a refund and spend a little more for a genuine HTC extended battery from someone you trust.

Well, besides that I cannot send it back (it's dearer than to dump it) the battery shurely has more than 1230 mAh. From what I saw its somewhat about 1800 mAh (1230 + 50% battery left when re-inserting).
Only the HD2 does not recognize it.
Regards, Franky

Cradle use and battery health

At the office I leave my phone in a cradle. When I get calls I remove the phone to answer and then return it to the cradle when done. My battery goes from 100% down to somewhere in the 90's then charges back to 100% in the cradle. Does this repeated process harm the battery in any way? I've read that these batteries don't suffer from the memory effect, but I'm still not sure if this counts as a charging cycle.
Sent from my Desire HD using XDA App

You should always let the battery run down completely some times maybe once a week.

Really? I've read on this forum that there is no need to do that with the new Lithium Ion batteries. I've even read that this could have a negative effect and you should try not to let the battery drain completly.
I don't understand why there isn't a proper battery care section in the manual. Its as if its some kind of voodoo science.

Perhaps not Once a week. But Once a "while"
The reason is that, Phone software uses approximation to calculate the charge left in the Battery. So over time, battery ages and software may not be calibrated to match with the battery's storage capacity. So draining the battery entirely and charging them fully gives the phone's software to assess the battery's health and recalibrate.

It's a lithium battery mate. The only way you can really damage it is by a complete discharge. So long as you don't switch the phone back on once it switches itself off due to low battery you needn't worry about anything else.

Also in theory the lithium batteries have a lifespan of say about a 1000 charges for example and everytime you charge it has one charging less left. This ofcourse isn't exactly how it is in practice but charging the battery alot wears it down. It isn't good either to keep it in the charger for a longer time after it's reached a 100%.

Hi,
this is only partly correct:
Suppose the battery can make 1000 (which I don't believe) charge cycles,
it means that you can charge 1000 times from empty to full.
If you just charge 1000 times from 50% empty to full it counts for 500 cycles!
So,
don't worry, let it stay in the cradle if you like
There are 500 opinions about that but believe, as I wrote is correct.
Theo

Yes, what I said wasn't exact science and I used 1000 cycles as an example, but from what I've read it is better to let the battery drain to less than 50% and then charge it full rather than charge 5% at a time. My previous post was meant to illustrate this.
Sent from my Leedroid powered pocketsized supercomputer using XDA App

geenome said:
You should always let the battery run down completely some times maybe once a week.
Click to expand...
Click to collapse
That's a load of crap, no offense... Lithium batteries have no memory effect and have absolutely no need to be completely discharged, that's a ancient thing from the time of nickel-metal hybrid batteries. The only actual reason for full charge cycles is to calibrate the device for that exact battery.
Keeping a lithium-ion battery in a charger most of the time will wear the battery down faster than getting it drain more and then charging it. Keeping the battery almost fully loaded/in a constant loading state wears the battery capacity by approximately 20% a year (can't recall the source/study just now)(EDIT: and my personal experience is that the battery capacity will wear that much anyway, no matter how you use it). The life-cycle of phones these days are roughly two years nowadays so IMO you can keep it in a cradle with no worries, if you wish. And lets face it, a new battery after a year of usage won't be that big an investment after all.

To add to the above post, running down a lithium battery completely does more damage than benefit. This is almost impossible though with normal use as the phone shuts down long before the battery is completely empty

Where can I find an acceptable extended battery for Galaxy S3?

Galaxy S3 Neo has a ridiculous stock 2100 mAh battery which offers a very poor duration. That's the reason I need an extended one. I have tried lots of extended batteries of different brands such as DSK, Anker, and one that I don't know its brand, I bought it from http://www.tucargadorsolar.com/. All of it have offered me a very poor duration. They are supposed to have twice the capacity of stock battery but here are the results that I got with all of them:
Original 2100 mAh battery, 100% charged, holds for 5:30 hours on continuous video playing until it reaches 5%.
Different extended batteries (4200 to 4400 mAh depending on the brand), 100% charged, hold for 6:45 hours on continuous video playing and in exactly the same conditions of the other test (screen brightness, bluetooth, wifi...).
I have repeated the test lots of times and always get the same results. If an extended battery of 4200 - 4400 mAh has a double capacity and original battery holds for 5:30 hours, why the extended one does not hold for the double, 11 hours?
I suppose that I have been testing batteries coming from not reliable brands.
I ordered a battery from Mugen Power 3 months ago, because it is supposed to be a reliable brand. But 3 months later still know nothing about the order I've made, and now they don't answer my e-mails.
What can I do? Is there another brand which is reliable enough to offer me a good duration?
I am really annoyed with this, I have lost very much money and time and all batteries I buy are in a very bad condition.

Well you could just money to buy another phone Anyway, if you're on stock, I can't say much, but using a custom kernel with governors etc, it would be really a great option as with the default battery, it last way more longer.
It's really strange, really. Have you calibrated the batteries right by reading the manuals? Are you sure about the capacities (Have you tested them with a multimeter)? Have in mind (if you haven't already known that) that I9300 batteries are exactly the same, because it's wide known and there are for sure reliable sources. A phone like Neo, is easily targeted with fake things. Last, you should buy from Amazon and read the reviews. Oh, did you try to contact with the companies?
Again, it's very strange....

S3 neo's battery functionality is a joke...
I try a lots of extended batterys baut only one is in right...Anker 7200mah(buy from amazon)
But s3 neo have a "bug"...completly charge of ectended batery is possible just if you replace battery after first charge to "100%" and put on charge again...aproximately after replace cell, phone was display the true charging %...
After 2x 3x replaces battery was true 100% charged...
Discharging is same way....after first 1-2% level replace the batt....it shows aprox. 70% after....
Replace "trick" is only one way to use extended batterys capacity.

Edit or Change Battery Capacity?

Hi there,
So I replaced my original battery to a bigger capacity battery (6,000 mAh), and I've been looking for a method to change battery capacity information file for Mi A1 but to no avail. Hence, the capacity is still at 3,080 (even in Kernel Adiutor) and I believe the phone wont charge to 100% 6,000 capacity. There are methods for other phones, but it seems the file is different for Mi A1 (using Havoc OS btw).
Anyone know the file location or any method to change the battery capacity?
Thanks.

what type of battery did you install? I had to change it but I couldn't find one that was so big and I had to replace one that was the same as the original.
sorry for my bad english.

I bought and installed BN31 Rakkipanda with 6,000 mAh, hence the huge difference (almost twice the capacity).

Is that even possible? I mean can u think that they will put twice the size of capacity in same size? I don't think it's 6000mah. U may damage ur device after altering capacity value. Its there for safety

Yea, I don't think that it is really 6,000 in real capacity, it is a third party battery after-all. But my original one was toast anyway, and I had nothing to lose, LOL. After installation, the battery-life in real usage is almost exactly the same as the original one (with the same ROM and kernel), but I have hunch that the battery is still not using its real capacity. I know it is probably not safe, but the phone itself is a backup phone, and I really am curious about the battery capacity.
There were double capacity batteries in Nokia old-times (and they proved to be true capacity -most of them anyway-), therefore I have faith that android phone batteries could be the same.

Hello. You can charge the phone to 100% and then check for the battery voltage. If it is close to 4.2v it means that battery is fully charged.

morcus said:
Hello. You can charge the phone to 100% and then check for the battery voltage. If it is close to 4.2v it means that battery is fully charged.
Click to expand...
Click to collapse
Tried this, the voltage indicates 4331mV at 100%. Should I keep on charging or disconnect the charger?
By close to 4.2V should it be under (at 50% I peeked the voltage reached only 3.9) or a little bit over?