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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)

iscio 2011-05-07 08:42
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
could you implement this notify for led and not error mode?

http://my-maemo.com/downloads/search...0Battery%20LED

dr_frost_dk 2011-05-07 08:57
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
you can make your own pattern and edit the QBW script to something else then "PatternError" and then use the pattern editor to have it like you want, do a search in the forum, there are some threads about the led pattern system.

dr_frost_dk 2011-05-07 13:00
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
1 Attachment(s)
I found a usage for the nice SCUD boxes, it really is a good battery, comes in such a nice box for usage in other contexts, and a nice bag for the battery

Attachment 19879
Have glued them on the shelf, now they work as small drawers for SMD leds etc. and they prevent stuff falling out :D

anapospastos 2011-05-08 14:06
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
How do you explain that battery meter widget has different values between a few minutes? Sometimes even over 10%.

nology 2011-05-08 14:36
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Ive had my scud now for a few weeks and its just awesome. with just a single scud I can moderatey use my phone and get home at the end of the work day with 20-at times 50% power left.
now why couldnt Nokia have provided a battery like this with the device?

Quote:
Originally Posted by dr_frost_dk (Post 1001675)
.... and a nice bag for the battery
lol, my bag got blown away within two days of having the battery

NokiaRocks 2011-05-08 14:44
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
I just ordered the scud battery too. Can't wait to get it =D

dr_frost_dk 2011-05-08 14:57
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by anapospastos (Post 1002124)
How do you explain that battery meter widget has different values between a few minutes? Sometimes even over 10%.
Because it takes a screenshot of current voltage, i have not included a average/guess algorithm.
Thats why

anapospastos 2011-05-08 16:09
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Do you plan to update it?

I' m awaiting too for the scud batteries to come :)

dr_frost_dk 2011-05-08 17:58
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Maybe ill update it at some point.
The code is not very advanced so anybody can make it save 3 or more points to a file and make and average sum

--------------------------------------------
Off topic:
I was wondering if we should make a buyer beware for EBAY and other shops, i would have added one more battery, but the seller canceled the order because he was afraid about getting more NEGATIVE feedback because he is selling fake items, have bought a "genuine" complete cover for the N900, and it if far from genuine, really crappy toy feeling plastic.

The Seller is 'raajjshop'

This would be a general Buyer beware (covers, accessory's) i will still handle the battery section
We have all gotten some "genuine" crap over the years

Estel 2011-05-08 22:24
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
I'm really with You on this one - i think we should get different topic to list buyer's beware about N900 stuff, or at least one in first 3 posts.

Anyway, i know that there is "Thank" button, but i could not thank you enough for this topic and Your all hard work (hard also means hardware in this case :D ). I'm now got a little hard time financially wise, but after dealing with that I'm definitely going to donate - guy like you who spent so much money and time on buying and testing stuff (and reporting it here for all of us benefit) certainly deserves that.

Thank to Your topic, I just ordered mugen backcover and 2x scud :) Can't wait to do modding, i also got some ideas how to use rest of spare space in case (to glue few microSD mounting points = additional unused microSD cards inside big cover).

BTW, some pages earlier you mentioned, that one can charge battery to 100% using modified external charger. I know that 2% isn't anything that really matter in real life, but i would like to try it - can you post what modification should we do? I got no serious experience with Li-Ion chargers - just starting to dig into it, and as far as i know this stuff monitor voltage and cut power off when hard-set limit is reached + got timer limit. How can we modify hard-set voltage limit? Some resistor trick? Of course i mean normal li-Ion chargers, not special things for RC models, which i presume don't need modding at all.

Also, last question, what is in Your opinion best "professional" charger to experiment with 3.7 batteries, by terms of price/quality factor?

dr_frost_dk 2011-05-09 09:05
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Hopefully someone will make a genuine buyers guide.

And Thanks for the kind words :)

I posted a simple charger made from 2x DX products, this will go to 100% but will be slow, and has no cut off, only a green LED indicator that it is done.
I would be better to be able to modify the N900's charging system, i cannot remember if anybody has already done this...

As for chargers like the RC chargers to "experiment" with 3.7V systems, any RC charger will do in my experience even cheap crappy ones, it's when charging multiply cells the quality comes in to play, here you want a charger that can balance probably so all cells end with the same voltage -/+ as little as possible.

And i will be making several links in post 1-3# to other users mods, and chargers, if anyone wants to help here, just PM me the link to you mod in this thread.

dr_frost_dk 2011-05-09 15:21
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Have Added Users Mods & Info in Post #2

Please PM me if i have missed anything, it was a fast look at all the pages....
Also PM me if the "title" of the links should be edited

Estel 2011-05-10 00:14
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Hey dr_frost_dk, thanks for answer and new nice ideas.

Another question related to your last post - using Your dual battery mod, we in fact get 2-cells battery, connected in parallel, yea? How about charge and voltage balance here? I know that using same type of new batteries is recommended if not necessary to get correct results, but what about charge-state of batteries in time of soldering them together? Should we just unload it to 3.3V / load to max in phone / whatever before soldering, or because they're parallel to each one, charge will balance on its own without any issues and we don't need to carry about that?

Another thing - many pages ago, you talked a little with zimon about connecting 2 cells before 1 protection circut vs. 2 batteries connected together AFTER their 2 protection circuits. Unfortunately i failed at understanding something - i know that You advised connecting 2 cells before 1 protection circuit (also that is what is intuitive for me), but can you post rationale for it? Of course if You recommend that just from Your personal experience i got nothing against it - but i like to know exactly what I'm modding and why, and there probably is some thing that i missed advocating about using 2 cell battery with 1 protection circuit (designed for single cell - does it matter at all?) vs two 1 cell batteries with their own circuits, connected in parallel.

*I use on purpose terms of one 2-cell battery with 1 protection circuit and two 1-cell batteries with their own 2 circuits - maybe I'm wrong, but that's technically all about 2 regular batteries vs 1 big battery - that is what i think we get after soldering 2 cells together, one big battery, where 2 cells with their own circuits are technically 2 batteries, yes? Yes, i know i messes it all upside down, but i think You know what i mean ;P Pros and cons of using 1 big battery or 2 small batteries connected i. e using 1 or 2 protection circuits.

dr_frost_dk 2011-05-10 11:44
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Yes it is technically 2 cells, but when connected in parallel (and the battery's are the same) it is a big 1-cell battery, multi cells like 2 - 1000 cells in generally a term for a battery with more voltage, like a car battery which is a 6-cell battery (2V x 6), if we use a 2-cell Li-ion battery then it would be 7.4V not 3.7V
The voltage in the 2 battery's is not critical when connecting them together, meaning that if one is 3.7V and the other 3.9V then it would be ok, just don't go much "higher" then that, and this means not more difference then 0.2V between them
So it does not matter if they are 3.3V or 4.2V, the way i do it is just charge them both up to 4.2V.
Again just don't connect 2 battery's with a high voltage potential between them, like connecting a 3.3V and 4.2V this has a risk of damaging the battery's, and if you do this after the circuits it could destroy the circuits.

Connecting the battery's after or before the circuits should not be critical, use zimon or cantruchd mod if you prefer a less "destructive" mod
I posted the links in post #2

Estel 2011-05-11 11:56
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
I prefer most destructive mods :D if there is not any rationale in keeping 2 circuits, i would go for detaching 1 and keeping it for further projects (to use with batteries that got nasty or not existent protection capacity, for example)

I just wondered if 2 protection circuits can help anything (I.e. circuit is designed also keeping capacity in mind), but if no, there is no problem. I don't plan to disassemble my dual battery again, and if even, i can solder that little pcb thing again...

Last question, i suppose - someone mentioned that li-po got low self ignition temperature - smth about 130 C. I feel very comfortable with soldering so i can do it fast, but should i also cool down cell itself during process (for example, by using ice in foil bag, of course water-proof, around cell during soldering), or this danger is overrated?

dr_frost_dk 2011-05-11 12:14
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
I just do the hole thing in basically one setting, if you feel that the battery's are getting very warm then take a break, i also put them together before soldering them together, this transfers a little heat from the battery that is being soldered to the one waiting, there by cooling it a little.

A good tip is to break off the circuit wire but still leaving some of it attached to the battery, if you don't do this soldering on the battery will be VERY hard.
Easy way to do this is to lift the circuit/plastic top up and then rocking it from side to side until the wire brakes.

I have not damaged any battery's so far, the only battery's i every had problems with was some crappy 18650 from DX, they "vented" meaning that the temp "fuse/valve" blew and i could smell the lithium, this causes the cell to dry out and capacity being lost little by little.
But i have not been able to do this on any BL-5J or similar battery's or other 18650 i have.

dr_frost_dk 2011-05-17 21:18
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Anybody found any battery's that needs a closer inspection?

toxaris 2011-05-17 21:23
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Just got a Scud delivered.
Sofar its working good. Lets see if I notice and better batterylife.

dr_frost_dk 2011-05-17 22:12
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by toxaris (Post 1008621)
Just got a Scud delivered.
Sofar its working good. Lets see if I notice and better batterylife.
Well if you are used to have a stock (1320mAh) battery and you have the blue scud you will!! :)

yasirrfc 2011-05-18 22:22
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
hey is the scud battery exported in asia?

dr_frost_dk 2011-05-18 22:30
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Don't know, have you checked the link?, They are generally sold from china, Hong Kong & ShenZhen, and last i checked thats part of asia :p

I would try to contact all the sellers if i where you.

yasirrfc 2011-05-18 22:48
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
lol ok thanks :)

NokiaRocks 2011-05-19 19:08
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
I'm already waiting 3 weeks to get the scud battery =D (Germany)
Cant wait to get it.

yasirrfc 2011-05-19 19:09
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
hey dr_frost_dk, i removed that line from dbus for not having the blink red light when less than 15 percent but now it doesnt show voltage and its colour is brown now. with that line it shows voltage and green colour. how can i get green colou with percentage and volts showing without red notification light?
thanks

dr_frost_dk 2011-05-19 19:40
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
I must assume at this point that you have no programming skills, even at this "baby" level.

Here's the code from the 1.6

Code:
charge=$(hal-device | grep is.charging | awk '{printf $3}')
x=$(hal-device | grep voltage.current | awk '{printf "%4.0f",$3}')
if [ $x -ge 4050 ];then
echo $x | awk '{printf "%3.1f", 85 + ($1 - 4050) / 12}{print "%"}'
level=0;fi\nif [ $x -ge 3900 -a $x -lt 4050 ];then
echo $x | awk '{printf "%3.1f", 70 + ($1 - 3900) / 10}{print "%"}'
level=0;fi\nif [ $x -ge 3800 -a $x -lt 3900 ];then
echo $x | awk '{printf "%3.1f", 50 + ($1 - 3800) / 5}{print "%"}'
level=0;fi\nif [ $x -ge 3660 -a $x -lt 3800 ];then
echo $x | awk '{printf "%3.1f", 15 + ($1 - 3660) / 4}{print "%"}'
level=1;fi\nif [ $x -ge 3600 -a $x -lt 3660 ];then
echo $x | awk '{printf "%3.1f", 5 + ($1 - 3600) / 6}{print "%"}'
level=2;fi\nif [ $x -lt 3600 ];then
echo $x | awk '{printf "%3.1f", ($1 - 3300) / 60}{print "%"}'
level=3;fi
if [ $level -gt 1 ]; then
dbus-send --system --type=method_call --dest=com.nokia.mce /com/nokia/mce/request com.nokia.mce.request.req_led_pattern_activate string:"PatternError"
fi
if [ $level -le 1 ]; then
dbus-send --system --type=method_call --dest=com.nokia.mce /com/nokia/mce/request com.nokia.mce.request.req_led_pattern_deactivate string:"PatternError"
fi
if [ $charge == "true" ];then
echo "Charging"
else
echo $x | awk '{printf "%1.3fV", $x / 1000}'
fi
exit $level
To disable led notification the simple way is to change "if [ $level -le 1] to 5 instead of 1, this also applies to the "-gt 1", change both to 5. Do this in the bottom with the dbus-send lines

dr_frost_dk 2011-05-19 19:51
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
have updated post #3, now with 1.6 and 1.6 (no LED)

yasirrfc 2011-05-20 01:24
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
hey dr_frost_dk i noticed something, in some battery monitoring app, it says my battery is 1250 mah like in netmon. and in battery graph it shows my phone gets a full charge at like 1222 mah. my battery is original nokia 1340. is it normal to see stuff like this? and one more thing, my battery is acting weird lately, both your batterymonitor and the status bar battery are going up and down and up and down. its like getting really difficult for me to find out the battery remaining. ive been using ur app for accurate battery left but its also showing me very HUGE differences like its 14.5 and then it gets 32 for like half and hour then 37 for half an hour then gets to 14.5 again. help would be appreciated

HtheB 2011-05-20 02:28
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Can anyone make some video tutorial how to easy dissassemble and solder the batteries?
I screwed 2 batteries.... :(

yasirrfc 2011-05-20 08:52
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
hey dr_frost_dk i got a mail from mugen batteries. they said that they have new back covers now. with camera lens slider. and they ship the batteries free but its too damn expensive. 96 dollars for a battery and what do u think of the phone generally after back cover? is it really thick? it ruins the cliche look of the n900? and i have mailed aliexpress for their battery as well. but no reply. lets see what happens

dr_frost_dk 2011-05-20 08:58
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by yasirrfc (Post 1010605)
hey dr_frost_dk i noticed something, in some battery monitoring app, it says my battery is 1250 mah like in netmon. and in battery graph it shows my phone gets a full charge at like 1222 mah. my battery is original nokia 1340. is it normal to see stuff like this? and one more thing, my battery is acting weird lately, both your batterymonitor and the status bar battery are going up and down and up and down. its like getting really difficult for me to find out the battery remaining. ive been using ur app for accurate battery left but its also showing me very HUGE differences like its 14.5 and then it gets 32 for like half and hour then 37 for half an hour then gets to 14.5 again. help would be appreciated
everything you talk about has been talked about in about every 2 page of this thread, you really have to research a little instead of just asking again and again, we all want to help but there is a search button and just taking 5min to read a few posts.

i told you and have posted again and again that my meter takes a current voltage measurement and thats it, need a more consistent reading, make and 3 or more point save and average calculation.

dr_frost_dk 2011-05-20 09:00
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by HtheB (Post 1010627)
Can anyone make some video tutorial how to easy dissassemble and solder the batteries?
I screwed 2 batteries.... :(
where you trying my method?, there are pictures in post (zip)

Im really sorry to hear it, can you explain how you tried to make the dual battery and what battery's you used?

dr_frost_dk 2011-05-20 09:02
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by yasirrfc (Post 1010790)
hey dr_frost_dk i got a mail from mugen batteries. they said that they have new back covers now. with camera lens slider. and they ship the batteries free but its too damn expensive. 96 dollars for a battery and what do u think of the phone generally after back cover? is it really thick? it ruins the cliche look of the n900? and i have mailed aliexpress for their battery as well. but no reply. lets see what happens
thanks for the heads up, but seriously, this have been talked about a MILLION TIMES and there is some info on it in POST #3 Q&A, what did i state in post #1 in the top?

vi_ 2011-05-20 09:14
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by yasirrfc (Post 1010790)
hey dr_frost_dk i got a mail from mugen batteries. they said that they have new back covers now. with camera lens slider. and they ship the batteries free but its too damn expensive. 96 dollars for a battery and what do u think of the phone generally after back cover? is it really thick? it ruins the cliche look of the n900? and i have mailed aliexpress for their battery as well. but no reply. lets see what happens
BWAHAHAHAHAAAA.

I find it astonishing that there exists a country that creates people that can write but are unable to read.

yasirrfc 2011-05-20 09:50
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by dr_frost_dk (Post 1010793)
everything you talk about has been talked about in about every 2 page of this thread, you really have to research a little instead of just asking again and again, we all want to help but there is a search button and just taking 5min to read a few posts.

i told you and have posted again and again that my meter takes a current voltage measurement and thats it, need a more consistent reading, make and 3 or more point save and average calculation.
hey i have read a lot. from the wifi bug to the background running applications bug to the extras protocol. i have tried smartreflex and what not. reflashed my phone. read so so much in this forum trust me. i have searched for battery and battery improvement and battery bug. read every thread. nothing seems to help.

dr_frost_dk 2011-05-20 09:59
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by yasirrfc (Post 1010851)
hey i have read a lot. from the wifi bug to the background running applications bug to the extras protocol. i have tried smartreflex and what not. reflashed my phone. read so so much in this forum trust me. i have searched for battery and battery improvement and battery bug. read every thread. nothing seems to help.
your battery is not acting weird if you see the % go up and down, this is based on LOAD, high load voltage goes down, low load the voltage goes up again closer to SOC at no load

SOC: State of charge.

if your battery was acting weird then you would notice that your N900 would shut off without warning.

geneven 2011-05-20 10:06
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by vi_ (Post 1010811)
BWAHAHAHAHAAAA.

I find it astonishing that there exists a country that creates people that can write but are unable to read.
I find it amazing that some people have such low self-esteem that they constantly have to seek out clueless people to abuse so they at least feel superior to someone.

jedi 2011-05-20 10:32
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by geneven (Post 1010866)
I find it amazing that some people have such low self-esteem that they constantly have to seek out clueless people to abuse so they at least feel superior to someone.
I find it amazing that some people have such high self-esteem that they have to seek out intelligent people to abuse so they feel superior to everyone.

yasirrfc 2011-05-20 11:32
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by jedi (Post 1010890)
I find it amazing that some people have such high self-esteem that they have to seek out intelligent people to abuse so they feel superior to everyone.
i feel that u should stop spamming every single thread and get a life

vi_ 2011-05-20 11:33
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by yasirrfc (Post 1010959)
i feel that u should stop spamming every single thread and get a life
And the circle of troll is complete.

yasirrfc 2011-05-20 11:34
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (GOTO POST #1!!!!!)
 
Quote:
Originally Posted by dr_frost_dk (Post 1010859)
your battery is not acting weird if you see the % go up and down, this is based on LOAD, high load voltage goes down, low load the voltage goes up again closer to SOC at no load

SOC: State of charge.

if your battery was acting weird then you would notice that your N900 would shut off without warning.
hey about the warning thing. i havent seen any warning in my n900 before it shuts down. i just get the low battery sound but when its about to die i dont see any message, i just crashes and shows a black screen and battery dead. then i rechagre


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