Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Hey dr_frost_dk, if You - just like me - don't like bme, to say at least, consider installing advanced power monitor paqckage. In last version, you can choose from 4 reading modes - stock bme, bq27200, stock bme alternative, and bq27200 alternative. I think you will like it, cause both alternative modes are based on Your discharge graph algorithm (I suggested it to 412b).

advanced power monitor replaces stock status menu battery indicator, and also small icon in status arena, so, it's basically all you need to forget of bme @ userside (at least on parts clearly visible to user).

If You mix it with fuel gauge chip calibration (and, after that, use bq27200 readings), You get ~100% accurate battery percentage reports. Options based on your graph also works pretty well, except for huge spikes (~20% from high usage to almost-standby - some capacity "guessing" base on few voltage readings divided would be great), and overall wrong readings on 3650 mV and lower (at least for dual Scuds - all the time on such "low" voltage, it thinks that battery is almost empty, still, we have few hundred of mAh remain).

Long story short, I love this program so much, that I'll probably re-compile kp48 to contain "dangerous path" allowing bme and bq27200 to live together... Unless someone write better solution for getting bq readings (unfortunately, beyond my skill, as opposite to "trivial" .diff attaching and compiling)

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Maybe ill try it, but for now my battery meter is fine for me, if i get the time i could look in to making some average points so it doesn't spike so much but instead "guesses" what current voltage state is.

Would be fun it the N900 could do a REAL TIME readout (50fps) of current voltage, then you can talk about spikes :D

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Read time readings would be... Well, battery drain overkill, not to mention waking CPU ;)

As for applets, don't get me wrong - Your idea is very good. It's just that Advanced Power Monitor disables vanilla monitor counterparts (thus they don't eat cycles/power), replacing it with own ones, + don't use widget space/resources, + contain many, easily switchable reading modes, including Your algorithm (also switchable between calculating on bme or bq27200 voltage readings).

Of course, one of best joys of FOSS is Freedom of Choice, so I'm not "pushing" you to switch ;)

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Right now im enjoying a fresh flashed phone, only advanced thing i have installed is 'Enhanced Linux Kernel for power users' just so i could OC to 700 for that little extra speed.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

id any of u bought batteries from the battery test thread.do they really supply them or its spam.how can i b sure.i live in bangladesh.my sister lives in UK.is der ny shop in UK dat my sister can go and buy it from

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Not easy to read.

are you saying that this thread is based on spam from the suppliers on page 1???????
Because i assure you like many other TMO users that this is no spam, i have used alot of time making this and alot of money, and not to mention the time used to check background on suppliers and dealing with the worst of them.....

So please say that you don't think all the work i did is SPAM!!!

EDIT: Also take any page and you will see some users talk about some of the battery's they bought on my recommendations from my tests.
DID YOU EVEN READ ANYTHING ON POST 1-3!!!!
Really pissed of right now if i understand you correctly.

AND if it was spam don't you think that moderators would have removed this thread mounts ago!!!!!!!!

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

@dr_frost_dk: trisha02 is just asking whether the suppliers are "spam" (which makes sense in a way considering that some of them they did sell bogus batteries). i doubt it's your hard work that is being described as such.
there's also concern since i believe the sister in the uk will be ordering the batteries and then shipping it to bangladesh.

@trisha02: there is no need to be writing in txt speak or sms language in an online forum. plain english will do. i can assure you (like many others here) that the batteries (specially the scud) are real as i've bought one myself ... dr_frost_dk has done all the hard work for us.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Sorry for off-topic, but trying to make Trisha consider using human language is quite pointless. I've tried looong time ago, and it seems that she/he/it only writes, without even reading answers ;)

[/off-topic]

As for improving battery meter algorithm - I noticed, that You've set 3300 mAh as 0%. No big deal, but it's wrong (and result in mine being notoriously, for example, on "-1% capacity" ;) ). In fact, BME turns phone on @ about 3200 mAh (in fact, little lower).

By "physical" limits, (with bme stopped) our bellowed N900 "dies" from out of power @ ~2850 mV. So I think setting 3000 mV as 0% is sane thing to do (by the way, bq fuel gauge got 3000 mV as 0% indeed - at this point device should be turned off unconditionally, but, for some reasons, it doesn't work on N900 bq implementation. Even thought EDVF is seto to 3000).

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

In my world that should equal ban, whats the point of us making alot of work in our areas and then some douche cant even take the time to read the basic (in this case post 1-3)

Back to battery:
Yes i have also seen my N900 go down to about 3200mV when it shuts off, and the battery tests are done from 4230mV to 3000mV, but most often i saw the N900 turn off at 3300mv and thats why i put 0% at 3300mv, but yes the real place would be 3000mV, only "problem" is that a 1320mAh battery will only have a maximum of 30mAh usable power from 3300mV to 3000mV hence why the N900 shuts off at between 3200mV-3300mV.

But again for full capacity tests it should be done all the way down to 3000mV.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

As promised, after two complete discharge cycle until the 3200mV range, capacity of a 6 months hard-hammered-dual-japod is 2948 mA (twice the same reading!)

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Thats true and I have seen a lot of people failing to help him/her/it.
He/she/it also likes to hijack threads to equalize his/her/its full lack of basic knowledge (giyf).

dr_frost_dk, please just ignore such posts.
And, of course, this was not related to Your work, which we all appreciate and honor. But just ignorance, so I fully understand Your feelings.
Thank You.

P.S.
I did not want to write anything, but enough is enough ....

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

I got strange things to report - in my case, stopping bme swap vdq to 0 unconditionally. I don't know why. If i recall correctly, many people reported that for them only one option to get edv1=1 is to disable bme, but, for unknown reasons, in my case it always screw vdq.

If someone else got exact results, I've useful advice:

It's still possible to calibrate correctly, it only need *much8 more carefully watching discharge process, when it's reaching end. From the point of 3300 mV, I usually turn off-line mode on. Then, voltage jump a little (due to less charge used) - when it reaches 3300 mV again, I turn brightness to min (with constant backlight *enabled* - switching it off and on may cause temporary,, yet huge voltage drop = bme can kick in and shutdown phone).

At this point, total power usage should be ~100 mA ("bq27200.sh 5" - loop mode - helps a lot in monitoring). Using dual scuds, I'ts now perfectly able to have < 3248 mV for 15 seconds, to turn edv1=1. After that, for another unknown reasons, BME shutdown the phone in 5 seconds (IDK, maybe this is only case in my device, lol), even that it';s still ~3235 mV - 3240 mV range. Thankfully, at this point fuel gauge already recorded edv1=1 and saved new "last measured discharge"

I don't know why it's working like that - at least in my case - Normally, BME turns phone @ around 3190 mV. I saw it personally, when not calibrating = higher current used. Maybe it's some time-trigger, so with higher power usage, we're able to go down to less than 3200 mV?

I even tried it with screen turned off, which resulted in ~40 mAh power usage, and results were the same. So, if we're approaching lower limit slower (for example, due to fact that we want to stay below 3248 for full 15 seconds), BME turn phone off @ little higher voltage.

I'll update tutorial to calibrate - first of all, I've moved kernel-power with bq27x00 module enabled to optional[ section, cause, as shadowjk correctly mentioned, it's not required to perform calibration. bq27200.sh and i2ctool are enough. Furthermore, kp48 got bq27x00 disabled + path allowing it to live together with bme removed.

I've also included "troubleshooting" section, with this tutorial to calibrate without disabling bme.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Finally got around making a "stand" for my mugen cover...

Not pretty but it gets the job done, really stable to.

And yes that is just a BLACK 1.5mm solid core wire, and some super glue, really doesn't get more low tech then that, just need to dull the edges.

Attachment 22150
Attachment 22151
Attachment 22152
Attachment 22153

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

0_o nice, invention through re-invention.

Although, I suppose that it isn't possible to write on keyboard comfortably due to 90 degrees standing? BTW, additional plus of that approach is having part of wire always with You (maybe even use three layers of 0,5 wire?), every McGyver will love that :p

I'm also working on good "leg" for my cover - tried many variants, currently I'm DIY'ing a 2-part telescope leg. I want to put in into free place from on/off switch (camera switch, obsolete with camera lens cover mod).

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

it's more for watching video and such, not for typing, other than that i really don't notice that it is there :)

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Haha wow, that is a *fat* N900.

xD nice.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

To further help on the battery power/capacity we apparently need new LCD screens

electronics-will-charge-themselves-with-energy-harvesting-lcd-screens/

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

what does it mean that after extensive testing the battery was 1500mAh

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

trisha02 seriously.......

im not going to answer that, i will give you some hours to think about it, maybe you will get it, everyone else has, not trying to be an as*hole here, but godda*mit.......

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

i am going to buy the scud. just wondering that its capacity is 1420 then how come it increased to 1520 after extensive use. just wondering what do u mean by that. like using it constantly.hammering it to its extent or what?

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

i've been using the scud for a while now, amazing battery

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

AGAIN WOW!!!!!!!!!!!!!!!!!!!

Are you completely retar*ed????????????

Let me explain it so even my 8 month old son could understand!!!!!!!


Capacity should be 1320mAh
This means that on the battery the cover/paper says 1320mAh and then you would think that it was 1320mAh


After extensive testing capacity was 800mAh
This means when the battery was tested under equipment that tests battery capacity, and in this case the REAL capacity was only 800mAh, meaning that it is "fake".


Why are there fake battery's???, well some chinese douche wanted to make a bigger profit and there by buying 800mAh battery's because they are cheaper, and then fitting a cover/paper that says 1320mAh and as high as 2400+mAh as have been seen.


EDIT: Also look at post 1.

Did you even try to read anything!!!!!!!!!!!!!!!!!

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

In other "news" i bought a used (but very good condition) N900 a couple of days ago, and have now tested the stock (1320mAh) battery to confirm that it has not been used much.
Capacity of 1 year (lightly used) BL-5J original battery is now 1220mAh, so in 1 year (and lightly used) it has lost 100mAh (9%), now if it had been used like we use our N900 it would be much more, like at least 200-400mAh.

Conclusion, if you have a 1 year old battery and get a SCUD you will REALLY get a boost in battery life, for arguments sake lets say your battery has lost 200mAh then you will get 35% more battery out of the SCUD.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

I knew it would only be a matter of time, now you'll collect N900s to go with all of the extra batteries and mugen covers you have. :D

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

hehehe, yes gotta use all those battery and covers, i am low on SCUD's so think ill order 3x next month then i can make a dual scud for the extra N900.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

How about a quad-scud with dual-mugen cover? you can do it! :)

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

:D

6000+mAh, and 12mm thicker even then mugen!!!

the N900 will be about 36mm thick then.....

don't think it would be hard to do, but i like the stock mugen thickness, it really makes typing better, but 12mm more might be to much, so maybe 3x scud would be ok, only 6mm thicker and 4500mAh+

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

It's better to create 100% custom cover (not only back-cover), made from galvanized cooper or aluminum ;) BTW, overclocking to higher speeds should be safe then, with such heat "distribution".

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

I wish you were my family member, in that case I could have all these cool batteries with such long uptime that you get out of so much mAh...lol :D :D :D :D :D

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

THANK YOU!!!! I bought 3 scud batts but had not the way to purchase cover!
>< Im so happy!

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

guys, so now i dont need to make some strange actions (for me) with battery, and can connect 2 scud with + and - via 1.5mm copper wire ?

Is it true? Z:)

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

where do i purchase mugen batteries with which they give an extra cover

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

they don't give you extra cover, if you buy the XL-Mugen 2400mAh battery then you get 1 XL-Cover for that battery.

------------------------

if you do the "wire" mod then no, just remember to tape/glue them together

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

dr_frost_dk
do u understand that u made incredible solution? :))

Thank you again!

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Your welcome, of course if you are referring to the wire between be battery's after the circuits (plastic tops) then that is not mine, mine is the HARDCORE one hehe, solder directly battery's together before the circuit (post #2)

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

Here's my little update on the Scud battery I've now had for about four months. In recent weeks I noticed that if I reboot or switch off and on it will pretty much kill it. A little example from today:

http://flic.kr/p/agv1f3

Before I had the Japod for roughly 3 months which now serves as a backup toghether with the now pretty shot original nokia battery, I might go back to the Japod or buy some more Scuds :)

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

something wrong with your scud, that is an EXTREME drop, only a short circuit can do that....

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

hello,

I was not brave enought to modify the hardware of my n900 so what I did was connected to 3000mah batteries in paralel, they produced about 5-6 volts. Conencted it to a usb-female port so that I can use it as Usb-based battery-powered backup charger. Tested it in usb mouse and usb speaker before connecting to n900, seems fine. Finally connected to n900.. nothing happened...
But later when I tried to charge n900 with its original charger.. it didnt charge and neither was it detected in computer... Found that I had interchanged the terminals... :( but other things work fine..

so seems like I have messed up things badly. Is there any solution for this??
maybe some short-circuit.
Sorry if it is posted in wrong thread... but it is related to extra power solution so I posted it here.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

I can confirm this.
When I bought my second hand N900, it was also approximately a year old. The stock battery on it averages 1265mAh.
When I bought an extra BL-5J (Ebay, shipped from singapore), it consistently measured in at 1365mAh.
In contrast, I got lucky with my scud because it averages 1530mAh :D

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 

What you describe sounds like what i did to "destroy" my USB, of course my wrong doing was REVERSE power (+ to -), and then my USB didn't work, and that's why i made my external charging system.

Now what has gone wrong with yours (like mine), well im thinking it's the FUSE that got wasted.

Take a look here at what i did to fix it.
http://talk.maemo.org/showthread.php?t=65568&page=22