maemo.org - Talk - Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1)

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- Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)

- - Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout (https://talk.maemo.org/showthread.php?t=65568)

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

hi guys, has anyone ordered BL-5J from ebay, because all the ebay links from the first page are dead and I would like to order one that has at least 1200mAh (proven)

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

i just got 2x of these HIGH CAPACITY BL-5J BATTERY FOR NOKIA 5800 XPRESSMUSIC.

And i will be updating post #1 soon.

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

scud blue dream is a dream battery.. really wow.. my phone lasts a day on 3G usage+browsing.. on continuous browsing it comes for 7hrs.. excellent one.. luckily i got one ;)

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

@ dr_frost_dk

have you measured them?

I just bought one :)

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

Well the 2x i bought have not been mesured, but they are the same as i bought a long time ago, they are from the seller oig.buy where i bought them before and tested them.

And they tested in at 1250mAh, and you wanted a cheap battery that holds over 1200mAh right?

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

modified bq27000.sh so that it displays VDQ when in LOOP mode...

to install
(copy & paste {path} to get it to the right directory)

Code:

find /usr -name i2cget

{path}/i2cget

cp bq27000_vqd.txt {path}/bq27000_vdq.sh

chmod 755 {path}/bq27000_vdq.sh

to run & redirect output...

Code:

cd {path}

bq27000_vdq.sh >>/media/mmc/bq27000_vdq.out

bq27000_vdq.sh 60 >>/media/mmc/bq27000_vdq.out

will generate a file with content similar to

Quote:

LOOPMODE=0
Reading values...........................done.

CSOC: 97 % RSOC: 97 %
Average Current: 202 mA
TTF: 65535 minutes TTE: 454 minutes
NAC: 1531 mAh CACD: 1531 mAh CACT: 1531 mAh
SI: 1 mA STTE: 64365 minutes
MLI: 1028 mA MLTTE: 88 minutes
AR: 0 mA ARTTE: 65535 minutes
Last Measured Discharge: 1574 mAh
Cycle Count since Learning: 0 Total Cycle Count since last full reset: 0
Reported Battery Voltage: 4010 mV
Battery Gauge die Temperature: 30 C
Flags: 0x04
Charge:0 NOACT:0 IMIN:0 CI:0 CALIP:0 VDQ:1 EDV1:0 EDVF: 0
eeprom data:
ILMD=2056 EDVF=3000 EDV1=3248 ISLC=20
DMF=14700 nanoVolt SD=201 thousandths of percent per day
AGELMD=1 TAPER=102 mA
IMLC=1028 mA
LOOPMODE=60
mv RSOC CSOC mA NAC CACD CACT VDQ TTE TEMP EDV1 LOW
22:59 3984 97 97 -242 1530 1530 1530 1 364 30 0

this way, it is easy to let the battery run empty & have all the values saved in a file automatically

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

@estel, check out the galaxy note battery. 3.7v 2500mah, it will be a tight fit but maybe it's worth a try.

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

Quote:

Originally Posted by zimon (Post 1217487)

What is "SoC" here?

And "cells of different max capacity will get different SoC after same mAh used". But the smaller capacity battery is not giving as much currency as the bigger one, I think?

I am thinking of analogy of two water buckets, another one larger (mAh) than the other, but both have the same water level (voltage) and the level is at the same height (voltage). Both have same diameter (resistance) tube underneath going to the Y-connector and then the connecting tube is leaking water (current) out to somewhere.

I think, the buckets will be empty at the same time, and still no water is going from the larger bucket to the smaller one. (or there is an error in my thinking?)

Yes, you are right. But real life might be of another opinion ;)
As long as the difference in capacity is not too high and their voltage is similar at the moment when you connect them, things should be fine. Of course both should have a similar internal resistance so that there won't be any voltage drop in one of them when the N900 draws power.
Looking forward to dr_frost_dk's results :D

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

If i execute bq27200.sh and it gives me
.Error: Could not set address to 0X55: Device or resource busy
a lot of times what that means??