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

How to Prolong Lithium-based Batteries

I just found this very interesting article, maybe you'll like it too:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Short summary:
1. "A partial discharge reduces stress and prolongs battery life. Elevated temperature and high currents also affect cycle life."
2. "Higher charge voltages boost capacity but lower cycle life and compromise safety."

its also suggested that you let your phone go through one complete discharge from 100 - 0% at least once a month.
- also on the heat front mentioned in the OP, i take it that means its best to remove your cover when charging your phone to stop a build up of heat?

You mean taking of the case, like Otterbox?
No, I wouldn't do so because my battery never gets warmer than 26-29 degrees.
Bad would be everything above 30°.

scaryshark said:
its also suggested that you let your phone go through one complete discharge from 100 - 0% at least once a month.
- also on the heat front mentioned in the OP, i take it that means its best to remove your cover when charging your phone to stop a build up of heat?
Click to expand...
Click to collapse
Our electronic profs at uni (who actually know what they are talking about) told us to keep the charge between 80% and 30%. Discharging to 0% only harms the battery.
So i'd really like to know where it's suggested that you should discharge to 0% once a month.
btw: This is a quote from the link from the op:
"The smaller the depth of discharge, the longer the battery will last. If at all possible, avoid frequent full discharges and charge more often between uses."
So i'd say that discharging to 0% once a month is nonsense and only harms your battery

I read that a while ago on the iPhone support website and did that for my old 3g, I just kept the practice running when I got my DHD. I guess either Apple is wrong or its only usefull for non-removable batterirs.
Sent from my Desire HD using XDA

That's probably why their batteries died so fast.

gotta voice in here. i've also heard that its optimal to keep your battery in the 80%-30% range. and that its only damaging to fully drain your battery.
but on the flip side, its kinda needed to do a wipe battery stats once in a while, so i can get a better reading of my battery.... was a time when i hadn't done it for ages, and i was at 1% battery while watching a movie for 30 minutes..
so, I recommend at least, to DONT drain your battery.. but if you are getting really off readings on your battery. do the wipe battery stats thing

My DHD battery seems to be getting worse and not holding its charge. as it's almost been 18 months I decided to buy a new OEM battery and I was jus wondering how should I run the 1st few cycles? And how long will it take to reach its optimum capacity? Also will I need to wipe battery stats and calibrate it?
Sent from my HTC Desire HD A9191 using xda premium

AllEyezOnMe said:
My DHD battery seems to be getting worse and not holding its charge. as it's almost been 18 months I decided to buy a new OEM battery and I was jus wondering how should I run the 1st few cycles? And how long will it take to reach its optimum capacity? Also will I need to wipe battery stats and calibrate it?
Sent from my HTC Desire HD A9191 using xda premium
Click to expand...
Click to collapse
No Calibration is a hoax, and battery stats are wiped whenever DHD is unplugged with nearly full charge (link to follow from one of the Android devs, don't have it to hand whilst mobile)
Sent from my Desire HD using Tapatalk

I used to worry about battery, then i purchased two of the cheap Ebay ones for like $3 they each hold about a day worth of juice. let the haters hate on the cheap batteries but it's $3! If they are of lower capacity (which must be miniscule because i can't tell) or they die early who cares. Buy a few of them and be done with it.
Sent from my Desire HD

brad808 said:
Buy a few of them and be done with it.
Click to expand...
Click to collapse
Why buy many batteries, when you can have 1 quality item?
Cheap batteries can also be a security risk (exploding cell phones e.g.)

scaryshark said:
its also suggested that you let your phone go through one complete discharge from 100 - 0% at least once a month.
- also on the heat front mentioned in the OP, i take it that means its best to remove your cover when charging your phone to stop a build up of heat?
Click to expand...
Click to collapse
how should we go about that? play heaps of games? increase brightness? or do you mean drain it slowly like over a day?

rootingdestroyer said:
how should we go about that? play heaps of games? increase brightness? or do you mean drain it slowly like over a day?
Click to expand...
Click to collapse
You shouldn't, draining batteries fully is no longer recommended practice
Sent from my Desire HD using Tapatalk

how to charge a new battery?
I still haven't received an answer to my past post. I've just got a new OEM battery and i wanted to know how should i run the first few cycles? is there a certain amount of time i should charge before i unplug it or do i just treat it as i would with a normal used battery?

AllEyezOnMe said:
I still haven't received an answer to my past post. I've just got a new OEM battery and i wanted to know how should i run the first few cycles? is there a certain amount of time i should charge before i unplug it or do i just treat it as i would with a normal used battery?
Click to expand...
Click to collapse
Suggested initial full charging/discharging cycles are ONLY made to train your phone and NOT your battery and in most cases aren't even intended for current android phones.
Those mythical suggestions are often based on facts for non-lithium rechargable batteries.
Nowadays rechargable lithium batteries are often shipped at least half full. So what you can and should do is just use the battery and try keeping it between 30% and 80%. That's all you have to do.

Dlog said:
Suggested initial full charging/discharging cycles are ONLY made to train your phone and NOT your battery and in most cases aren't even intended for current android phones.
Those mythical suggestions are often based on facts for non-lithium rechargable batteries.
Nowadays rechargable lithium batteries are often shipped at least half full. So what you can and should do is just use the battery and try keeping it between 30% and 80%. That's all you have to do.
Click to expand...
Click to collapse
So are you saying i shouldn't even charge it to 100% and what about the recommended monthly full charge to complete discharge to calibrate the battery?

Well you can charge it to 100% if you want. That will reset the battery log of your phone, so it can't hurt that much.
But charging it for an extensive amount of time will bring you no good. The charging circuit in your phone and in general the charging circuit used to charge lithium-ion batteries will stop charging once the battery is full. That way it prevents the battery from overcharging. But it also means that charging your phone for any more time than it needs to won't make it run any longer.
The monthly complete discharge is not to calibrate your battery as i've allready stated. It is used by the phone to better estimate how much power your battery can currently hold. So in a sense it's used to calibrate but not the battery itself but the battery statistics in your phone.
The phone knows how much energy the wall-charger provides and can thus determin huch much power is stored in the battery once it hits 100% (or better: reaches it's maximum voltage). If you have a charge from 1% to 100% then the phone can obviously determin the battery's capacity more accurately than if you charge it from 50% to 100%.
/edit:
And yes. If you really want to prolong your batteries life then keep it's charge between 80% and 30%.
But just see to it that the charge is above 30% and you're good.

Dlog said:
Well you can charge it to 100% if you want. That will reset the battery log of your phone, so it can't hurt that much.
But charging it for an extensive amount of time will bring you no good. The charging circuit in your phone and in general the charging circuit used to charge lithium-ion batteries will stop charging once the battery is full. That way it prevents the battery from overcharging. But it also means that charging your phone for any more time than it needs to won't make it run any longer.
The monthly complete discharge is not to calibrate your battery as i've allready stated. It is used by the phone to better estimate how much power your battery can currently hold. So in a sense it's used to calibrate but not the battery itself but the battery statistics in your phone.
The phone knows how much energy the wall-charger provides and can thus determin huch much power is stored in the battery once it hits 100% (or better: reaches it's maximum voltage). If you have a charge from 1% to 100% then the phone can obviously determin the battery's capacity more accurately than if you charge it from 50% to 100%.
/edit:
And yes. If you really want to prolong your batteries life then keep it's charge between 80% and 30%.
But just see to it that the charge is above 30% and you're good.
Click to expand...
Click to collapse
Ok thanks for all the information your help is much appreciated

Dlog said:
The monthly complete discharge is not to calibrate your battery as i've allready stated. It is used by the phone to better estimate how much power your battery can currently hold. So in a sense it's used to calibrate but not the battery itself but the battery statistics in your phone.
Click to expand...
Click to collapse
How so? Battery stats is wiped when you unplug the nearly charged phone, so where is this historical data found?
Sent from my Desire HD using Tapatalk

ghostofcain said:
How so? Battery stats is wiped when you unplug the nearly charged phone, so where is this historical data found?
Sent from my Desire HD using Tapatalk
Click to expand...
Click to collapse
beats me^^
My point was that the calibration is done for the accuracy of the percentage displayed and not to make your battery hold more energy, regardless of what phone/device you use.
And i'm using Battery Monitor Widget so i tend to mean that when i talk about the "historical data". Because BMW really does tell you to run larger charge cycles to increase accuracy. It however doesn't tell you that constantly running your battery down to 0% will only shorten it's lifetime.

[Q] best time for recharge battery

anybody know when the time is best to recharge the phone battery?
because i heard that lithium battery should not empty before recharge... and if i empty battery (1%) , this damage the battery

persiansoftware said:
anybody know when the time is best to recharge the phone battery?
because i heard that lithium battery should not empty before recharge... and if i empty battery (1%) , this damage the battery
Click to expand...
Click to collapse
about 20% is the best time i read somewhere

jaythenut said:
about 20% is the best time i read somewhere
Click to expand...
Click to collapse
if i empty the battery, is damage my battery??

persiansoftware said:
if i empty the battery, is damage my battery??
Click to expand...
Click to collapse
If you do it to often it will shorten the battery life

wait till it asks You to charge , I guess that message is for this . Connect your charger ! under 15% Phone tells You itself
Sent from my SM-N9005 using XDA Premium 4 mobile app

persiansoftware said:
anybody know when the time is best to recharge the phone battery?
because i heard that lithium battery should not empty before recharge... and if i empty battery (1%) , this damage the battery
Click to expand...
Click to collapse
Above are all incorrect!
Charge at 50% and you can do it about 1500 times.
Charge at 20% and you can do it about 700 times.
Source: lots of places and lots of experience, but alse here for you to read: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries (oh and "100% DoD" means fully drained battery!)
Peyman92 said:
wait till it asks You to charge , I guess that message is for this . Connect your charger ! under 15% Phone tells You itself
Click to expand...
Click to collapse
I hope you dont do that for all your phones as it will destroy your battery way sooner. Charge it when it reaches 50% and you can do 3 to 5 years with the battery at 24/7 use. (Instead of the 1 to 2 years when draining the battery).

Yes, it is recommended to charge the battery when it below 40% and disconnect the charger when it reach 99%. Do not overchange.

There was a big test I did read and the best was to keep it between 40 and 80 percent.
Sent from my SM-N9005 using xda app-developers app

charge it when it prompts you to charge. at 19% you start getting the first recommendation in lockscreen, then at 15% you even get an annoying prompt.
Sent from my SM-N9005 using xda app-developers app

Are you guys seriously sitting and watching until the battery goes down to certain percentage? And for what? Battery is easy to replace and not that expensive, it has a circuit to protect it from over and under charging, to avoid the damage and you get many more shallow charge/discharge cycles than deep ones as already mentioned. I charge my phone daily in the evening at my convenience, usually before I go sleep regardless of what's left (unless I use it so much it can't last until evening), so by the time I go sleep it's 100% and by morning it will be around 97% and normally last me whole day. I've been doing this for yrs and for example my 4yr old Nokia I gave to my friend, still lasts him couple days of light use on original battery. I wouldn't worry about it at all. Every few months you may want to fully discharge it to lets say 3-5% to have the meter calibrated and maybe clean the contacts with alcohol every six months or so, but that's all the maintenance my battery will get or need. If it fails before the phone, it probably had some factory defect or something, but no big deal as long as there is replacement easy to buy and with so many millions of notes sold, there should be.

pete4k said:
Are you guys seriously sitting and watching until the battery goes down to certain percentage? And for what? Battery is easy to replace and not that expensive, it has a circuit to protect it from over and under charging, to avoid the damage and you get many more shallow charge/discharge cycles than deep ones as already mentioned. I charge my phone daily in the evening at my convenience, usually before I go sleep regardless of what's left (unless I use it so much it can't last until evening), so by the time I go sleep it's 100% and by morning it will be around 97% and normally last me whole day. I've been doing this for yrs and for example my 4yr old Nokia I gave to my friend, still lasts him couple days of light use on original battery. I wouldn't worry about it at all. Every few months you may want to fully discharge it to lets say 3-5% to have the meter calibrated and maybe clean the contacts with alcohol every six months or so, but that's all the maintenance my battery will get or need. If it fails before the phone, it probably had some factory defect or something, but no big deal as long as there is replacement easy to buy and with so many millions of notes sold, there should be.
Click to expand...
Click to collapse
Couldn't agree more, I charge mine on a evening regardless and phone gets me easily through a day. If I notice a massive drop in the battery not holding a charge then I will buy a new one. More important things to worry about in life than watching my percentage for the battery.
Sent from my SM-N9005 using XDA Premium 4 mobile app

HanZie82 said:
Above are all incorrect!
Charge at 50% and you can do it about 1500 times.
Charge at 20% and you can do it about 700 times.
...
Click to expand...
Click to collapse
That is good as a principle but the numbers are still rather big and depend even more on the charging current - if you charge (even) from 50% with 2000 mAh it will never last 1500 recharges - that is why Samsung has slightly improved the Note 3 recharging algorithm so as to use (variable) lower currents (even if the charger is 2000 mAh), and also why it is still far, far better to recharge from a very good USB at under 500 mAh (actually 450) - and indeed preferably from over 40%.

xclub_101 said:
That is good as a principle but the numbers are still rather big and depend even more on the charging current - if you charge (even) from 50% with 2000 mAh it will never last 1500 recharges - that is why Samsung has slightly improved the Note 3 recharging algorithm so as to use (variable) lower currents (even if the charger is 2000 mAh), and also why it is still far, far better to recharge from a very good USB at under 500 mAh (actually 450) - and indeed preferably from over 40%.
Click to expand...
Click to collapse
As long as the charging current is lower then 1C (1 full charge for the note3 its 3200mAh) its not a problem and wont shorten lifetime.
But yeah charging at lower currents is better, but more due to less heat and induction.
Anyway its just sad that other people with little to no knowledge about lithium batterys are giving advice, and WRONG advice at that.
Just read the link i posted in previous post (page1) there are the facts. Dont believe just anybody, people are stupid. (yeah im people too )
The chemical reaction will be less when battery is drained and is hard to recover.
But if the battery seems dead, put it in the freezer for 2 or 3 hours and it will be recoverable.
Theres more to these batterys than people think.

3T battery has 20% less battery capacity [2742mAh instead of 3400mAh]

So I've noticed that my 3T battery has about 20% less battery capacity than advertised.
And I've used an external amperemeter to measure the capacity. I've let the phone turn off und charged it while being off until no current was flowing anymore. Here is a picture of the result:
2742mAh!
The thing is that I have found another person that used the exact same amperemeter and measured the same way. https://forum.xda-developers.com/showpost.php?p=70254148&postcount=344
His result: 3339mAh which is much closer to the advertised number and would be absolutely acceptable.
So either I'm very unlucky with a bad battery or the batteries have such huge capacity fluctuations.
I've contacted OnePlus, but currently they deny that there is anything wrong with it. They said they'll forward it to their engineering, which basically means they don't care. (If they did they would get ahold of my device and see what's wrong with it)
So I urge more people to measure their phones capacity to see if there is something wrong with it. 20% less capacity is not acceptable in my opinion.
Search for "USB amperemeter" if you want to find the same device or something similar to what I used.

Really??

Lipo voltage is 3,7V
Maybe you need to convert your results to this valtage.

According to Accubattery I'm at around 95% full charge with my brand new OP3T. It should really be 100%.

I use accuBattery and the best read I had on charging was 3,250mAh. But I can see the missing 150mAh being in below 0% battery cause I've found that it still has battery below that (I was able to completely discharge it which was below the android shut off point, with a trick, but I don't recommend doing it).
So ye, I think mine is close to the 3,400 value give or take a tiny bit (at least 3,300).

My battery reads 3211mAh on Accubattery. Not sure how accurate this is though but I guess it's okay since I've charged it to 100% a couple times. Not sure.

Hi I have the same measuring device as you posted and mine records 3087mah from a powered off 0-100% charge.
Using the same device to measure my old worn out nexus5 and the result was very close to the spec capacity, surprisingly little battery capacity lost due to age.
For me I bought the 3T for the increased battery compared to the 3. Batteries wear out over time I paid extra to have more to work with long term.
So while my numbers are better than OP's I'm unhappy too, I may as well saved the £80 and bought the 3000mah 3.
Edit: The Accubattery battery app says I have 94% battery health, I have been running it for a couple of weeks

Let's compare our results.
Wysłane z mojego ONEPLUS A3003 przy użyciu Tapatalka

I also have 94% capacity in accubattery. I am quite sure that this is an inacurate measurement of the app for the 3T, and not some problem with the new battery.

I would not expect software based measurement to be accurate, though it is interesting many of us are seeing 94-95% "health".
The OP and I have used an actual hardware based measuring device, while cheap (couple of bucks on eBay - search for USB doctor) its meant to be relatively accurate and the model pictured apparently comes pre-calibrated from the factory.

Mine says it's 3400mah

the app kernel adiutor tells you your used mah in your battery. for most phones the mah a phone can use from its battery is about 92-95% if its labeled capacity.
Also u should trust your phone's system apps. Tools can always have those problems or calibrations. Use something like CPU-Z to check your phone specs. Your phone knows better than an external tool.

Mine also 3000 mah in CPU-Z.....
---------- Post added at 07:48 AM ---------- Previous post was at 07:44 AM ----------
Just check on the internet, it said the CPU-Z is not updated the information, please try another to check it.

Im pretty sure that 5% battery is kept for clock and other stuff that needs battery ( just my oppinion ). Anyway, getting 1,5 days of battery is more than enough for me + the amazing dash charging which does the job pretty well, they could take 50% of the battery, if i'm still getting these results. Also,with nougat, things are getting better and better for me.

if this device sits in between the charger and the phone, use a regular charger instead of the dash charger to see if it makes a difference. Dash charger may be messing with your device.

This kind of worries me as I've come from a 6P which had battery shut downs at 20%+ because of fast degradation, losing 1000mAh in a year. Hope this isn't a side effect of fast charging?

Guys, please don't post those software calculations here, they are not accurate.
Use an external measuring device. Like this https://www.amazon.com/PowerJive-Voltage-Multimeter-chargers-capacity/dp/B013FANC9W
Let the device turn off due to low battery, then charge while the phone is off until current stays at 0.
ludester said:
if this device sits in between the charger and the phone, use a regular charger instead of the dash charger to see if it makes a difference. Dash charger may be messing with your device.
Click to expand...
Click to collapse
I did.

cethafralo said:
I would not expect software based measurement to be accurate, though it is interesting many of us are seeing 94-95% "health".
The OP and I have used an actual hardware based measuring device, while cheap (couple of bucks on eBay - search for USB doctor) its meant to be relatively accurate and the model pictured apparently comes pre-calibrated from the factory.
Click to expand...
Click to collapse
Just purchased that doctor I'll tell my measurements when this thing arrives.

prellele said:
Just purchased that doctor I'll tell my measurements when this thing arrives.
Click to expand...
Click to collapse
Make sure you purchase a device that can measure mAh. I've seen some that apparently only show voltage and current.
Also, update on my battery soon, I've got some interesting news.

Triversity said:
Make sure you purchase a device that can measure mAh. I've seen some that apparently only show voltage and current.
Click to expand...
Click to collapse
Good advice. I ordered one looking like yours, so I'll think its fine

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?