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maemo.org - Talk (https://talk.maemo.org/index.php)
-   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)

dr_frost_dk 2012-09-28 06:14
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by Crogge (Post 1273121)
So is Polarcell the best available battery right now?

I use right now the SL-III2E-D31322L battery with 1420 mAh from Aliexpress which was suggested here 1 1/2 years ago~ but it seems to be loosing power slowly :/
so far yes, and our battery's don't have many cycles so they wont last much more then 2 years and at that point they wont have much capacity left.

romanianusa 2012-10-20 16:50
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
I don't know about you guys but I bought this battery here at Amazon
http://www.amazon.com/2050mAh-Batter...tery+For+Nokia

Advertised as 2050 mAh
I tested and it charged up full to 660mAh or more.

Don't let the numbers fool you because this battery is AMAZING!! I believe i can use the phone for 2 straight days w/ regular usage such as text and phone call and music which mean it can last up to 48hrs of normal usage. Now compare that to my stock battery....there's no comparison, my stock battery from going to work and leaving work is all but dead for normal usage. Also, this NEW battery DOES NOT DRAINED!! I think if i leave it alone and never use the phone, it will last forever...well maybe not forever, but weeks and weeks. The reason i say this is because from the time i went to sleep to waking up and looking at the batterygraph, i see virtually a straight line slight slight unnoticeable decline for 8 hrs!!! That means it DOES NOT drained like the stock battery. I don't know about any other batteries like the SCUD or how those perform but this battery is the bomb so far. I just ordered another spare one.

Estel 2012-10-20 17:01
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by romanianusa (Post 1283025)
I tested and it charged up full to 660mAh or more.

Don't let the numbers fool you because this battery is AMAZING!!
:p
---

May I ask you, how You know that you have charged it to 660 mAh? sounds like hoax to me, honestly.

romanianusa 2012-10-20 17:18
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by Estel (Post 1283030)
:p
---

May I ask you, how You know that you have charged it to 660 mAh? sounds like hoax to me, honestly.
No hoax man I don't know what i did...on the status bar, i chose Nokia's BME Alternative instead of Nokia's BME because Nokia's BME always show 100% full battery. Nokia's BME Alternative gives me the accurate %, this is the only way I can see how much % i have left as i am using the phone, the Desktop Command Execution Widget shows up at 660mAh at full charge (95%+) or around that range. I found it odd that full charge is 660mAh (well, one other time it shows up as 710mAh), but never over 1000mAh like the stock battery.

Estel 2012-10-20 19:32
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Hoax, sadly, without any offense to you. This reported capacity doesn't have anything to do with real one.

BME Alternative is, in fact, taking voltage report from BME, and appending dr_frost_dk's algorithm to calculate remaining % of charge. If doesn't have anything to do with capacity readings (mAh), and probably, you got this 660mAh/710mAh due to resistor between BMI and battery (-). This particular battery must use strange one, there, instead of 100kOhm regular.
---

What I suspect, is that it's - at best - regular 1300 mAh one. It gives good results, compare to your old battery, which must have low amount of capacity left at max (probably, real is less than 1000).
---

If, by any chance,you're interesting in measuring capacity of your new battery in reliable way, see my signature - one of links there forward you to instruction, how to do it on-device, using bq27x00 chip, present on N900.

/Estel

romanianusa 2012-10-20 20:34
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by Estel (Post 1283113)
Hoax, sadly, without any offense to you. This reported capacity doesn't have anything to do with real one.

BME Alternative is, in fact, taking voltage report from BME, and appending dr_frost_dk's algorithm to calculate remaining % of charge. If doesn't have anything to do with capacity readings (mAh), and probably, you got this 660mAh/710mAh due to resistor between BMI and battery (-). This particular battery must use strange one, there, instead of 100kOhm regular.
---

What I suspect, is that it's - at best - regular 1300 mAh one. It gives good results, compare to your old battery, which must have low amount of capacity left at max (probably, real is less than 1000).
---

If, by any chance,you're interesting in measuring capacity of your new battery in reliable way, see my signature - one of links there forward you to instruction, how to do it on-device, using bq27x00 chip, present on N900.

/Estel
Of course the measurement of 660mAh at full charge is not accurate, but the usage is 2x or 3x longer than the stock battery...that's all i care about. The stock battery actually measure around 1220mAh. So if the stock battery last 8hrs for me every day normal usage and this new one last 2x or 3x longer, then it's reasonable to say the capacity is as good as advertise which is 2050mAh. Why don't you buy one and do a true measurement...it's pretty cheap. I like to find out myself what the real capacity too. It looks like a PolarCell battery w/ the same advertisement.

31hrs usage and 22% battery left.

knuthf 2012-10-20 22:34
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Good news, because it seems like the Maemo software keeps on charging. Now what does the "Battery" graph say?

Does anyone know if the charger can be set to charge higher than 1280mAh? I have a new 2450mAh battery, and have to use an external charger, the N900 charger stops the charge half way.

Estel 2012-10-21 03:12
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by romanianusa (Post 1283136)
So if the stock battery last 8hrs for me every day normal usage and this new one last 2x or 3x longer, then it's reasonable to say the capacity is as good as advertise which is 2050mAh.
Sadly, impossible, due to physical constraints of energy amount, that you can store in given volume of space, using LiIon technology. That is why I've called it hoax.

Honestly, I'm not much interested in buying another, unchecked battery - especially, if it advertise 2050 mAh, which usually means "stay away"... But, of course, you're absolutely free to perform on-device measurements, as I've suggested in my last post. It's not only free, but it's *more* than free - in fact, while doing so, you would educate yourself quite a much about some internals of your device (and it's usage) and system. All gain...

Quote:
Originally Posted by knuthf (Post 1283164)
Does anyone know if the charger can be set to charge higher than 1280mAh? I have a new 2450mAh battery, and have to use an external charger, the N900 charger stops the charge half way.
*chuckles* No, it doesn't. N900 will charge battery to the very end, be it 500 mAh or 50 000 mAh. It's just that capacity of your battery is totally faked, like in previous example.

/Estel

yrannadx 2012-10-21 05:46
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by romanianusa (Post 1283136)
The stock battery actually measure around 1220mAh. So if the stock battery last 8hrs for me every day normal usage and this new one last 2x or 3x longer, then it's reasonable to say the capacity is as good as advertise which is 2050mAh.

31hrs usage and 22% battery left.
Every day normal usage is very different for different people. For example in my case, with 1700 mAh battery (measured accurately several times), with normal usage which means phone, text, internet, email, etc., I usually get 3 and half days easily. After 31hrs usage I have usually around 70% left or more.

shubell 2012-10-23 07:33
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
I just ordered one scud battery here
http://www.aliexpress.com/store/prod...630196561.html

Will se how it works. It is said that it is a 1500mah :)

shady 2012-10-24 17:51
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by shubell (Post 1284317)
I just ordered one scud battery here
http://www.aliexpress.com/store/prod...630196561.html

Will se how it works. It is said that it is a 1500mah :)
I jsut ordered from them as well, lets see how long this takes .... 15-26 days with 7 day order processing .... sheesh!!!

romanianusa 2012-10-25 05:21
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by Estel (Post 1283227)
Sadly, impossible, due to physical constraints of energy amount, that you can store in given volume of space, using LiIon technology. That is why I've called it hoax.

Honestly, I'm not much interested in buying another, unchecked battery - especially, if it advertise 2050 mAh, which usually means "stay away"... But, of course, you're absolutely free to perform on-device measurements, as I've suggested in my last post. It's not only free, but it's *more* than free - in fact, while doing so, you would educate yourself quite a much about some internals of your device (and it's usage) and system. All gain...

/Estel
I don't know how to perform the on-device measurements even with directions so i am not going to try it. As for the battery being a hoax, i am not sure what you mean by hoax. I am not trying to proven anything. All i know is i am getting 2x or 3x longer usage than my stock battery and the Desktop Command Execution Widget show up at 680mAh.

romanianusa 2012-10-25 05:26
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by shady (Post 1285015)
I jsut ordered from them as well, lets see how long this takes .... 15-26 days with 7 day order processing .... sheesh!!!
$20??? LOL....waste of money imo. With $20 i can get FOUR of the battery of the one i mentioned in early post and who knows maybe the battery i bought is the same quality as SCUD because it sure last hella long to me. Although i don't know how to measure the actual mAh, but base on experience, this sucker last pretty long.

Estel 2012-10-25 20:42
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Sure, and for that money you could buy 20 3V coin batteries. But how it is related?

The thing behind having most-capacity battery, is that you don't need to stop everything you're doing/turn device off/replace battery/turn it off/re-start everything. Of course, it also means, that you don't need to carry 43242 replacement batteries with you.
---

I have idea for DIY belt, containing 10+ batteries, connected in parallel, with port for charging devices via USB. Of course, for that idea, I'm going to use batteries with best capacity/price ratio. But, for one (dual)_ sitting inside device, I want max capacity. Especially, that every difference in capacity is doubled, when using dual battery.

difference between 1500 mAh and 1200 mAh one, when dual'ed, is 600 mAh - it's half of standard, single N900's battery. That is something, after all.

/Estel

WeASeL... 2012-10-30 05:45
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
1 Attachment(s)
I want to test out this battery.

It's in my phone now and I'm still waiting on it to be fully drained so that I can charge it.

dr_frost_dk 2012-10-30 12:49
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by WeASeL... (Post 1287406)
I want to test out this battery.

It's in my phone now and I'm still waiting on it to be fully drained so that I can charge it.
I already tested a "gold" battery, they are ALL crap, sorry
I actually tested quite a few of them for various phones, not just for the N900 (BL-5J)

Estel 2012-10-30 23:20
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Of course, no reasons, why he couldn't test it in own device, via method described in my signature :) I wouldn't expect good capacity too, though.

/Estel

dr_frost_dk 2012-10-31 09:06
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by Estel (Post 1287820)
Of course, no reasons, why he couldn't test it in own device, via method described in my signature :) I wouldn't expect good capacity too, though.

/Estel
Yes of course, no problem with that at all.

Im just not going to test one more gold battery, been there (several times) done that, they are all fake and also off poor build quality, even even worse sometimes they cost up to 100$, guess the price is to seem legit, that is until you find out how bad they are....

Estel 2012-11-01 01:15
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by dr_frost_dk (Post 1287981)
, even even worse sometimes they cost up to 100$,
W-h-haat?! :eek:

vi_ 2012-11-12 09:18
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Just calibrated my new 'polarcell', it came in at 1540mAh!

smaile 2012-11-14 09:27
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
i ordered a scud battery from aliexpress as well. unfortunately i only got scud: scl-1109A 1350 mAh.:eek:

anyways they shipped it within 21days - no complaining about that - but after initial use i got a few error messages (cant reproduce - i ignored them) i am at a point, where my n900 is not charging at all.

i screened talk forums about solutions (a few other people here have problems as well) but until now i couldnot find something meaningful. maybe conclusion, battery is faulty is the right one.

jw461 2012-11-27 02:01
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
I built a dual scud setup about 6 months ago. It worked great after a couple of discharges, reading around 2600mah. I've noticed low-battery warnings faster than before over the last month so I did another discharge today. 1878mah

Looks like I got some bad ones because these didn't last me any longer than those generic chinese ebay batteries :(

sEKI 2012-11-27 09:04
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Indeed your's seem to be be fake-ish, my DualSCUD only dropped to 3333mAh after few months use...

ahmadamaj 2012-12-05 08:03
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
so no new source for good Scud batteries? should i go with the polarcell one?

handaxe 2012-12-06 08:55
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by ahmadamaj (Post 1301539)
so no new source for good Scud batteries? should i go with the polarcell one?
I believe that is correct at the moment.

petur 2012-12-21 08:31
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
I can recommend the PolarCell mentioned in the first post.
ebay link: http://www.ebay.co.uk/itm/PolarCell-...item5ae5cc9046

More importantly, I can REALLY recommend the seller, Wannsee-Electronic (http://stores.ebay.co.uk/wannseeelectronic). My battery arrived severely dented and bent, as if the postal services ran a truck over it. One message and a few pictures of the battery later, and a replacement was shipped.

They also ship very fast. If you want to buy a PolarCell battery from a trustworthy place, buy from them.

sixwheeledbeast 2012-12-22 09:29
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by petur (Post 1306533)
I can recommend the PolarCell mentioned in the first post.
ebay link: http://www.ebay.co.uk/itm/PolarCell-...item5ae5cc9046

More importantly, I can REALLY recommend the seller, Wannsee-Electronic (http://stores.ebay.co.uk/wannseeelectronic).
Yes , I completely agree good customer services and fast postage. I have two now.

Anubis Black 2012-12-24 23:37
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Just a quick question regarding mugen covers. Going to the provided link and searching for HLI-N900XL yields a single result, which requires you to buy a battery with the cover, so I guess this is not the correct procedure.

If I understand correctly, the suggestion is to follow the link provided and in the field "Battery Model and Cover Color" to put "HLI-N900XL" and in the "Your Battery Order Number" field to write "50002XXXX" where XXXX ranges from 0001 to 3000. Is this correct? What bothers me is that this page is an order for an additional backdoor, which seems to be different from a cover (if one is to judge by the image shown).

Can you please shed some light on this issue, perhaps whether or not the cover is still available and if the workaround is still possible?

Anubis Black 2012-12-24 23:43
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Just a quick question regarding mugen covers. Going to the provided link and searching for HLI-N900XL yields a single result, which requires you to buy a battery with the cover, so I guess this is not the correct procedure.

If I understand correctly, the suggestion is to follow the link provided and in the field "Battery Model and Cover Color" to put "HLI-N900XL" and in the "Your Battery Order Number" field to write "50002XXXX" where XXXX ranges from 0001 to 3000. Is this correct? What bothers me is that this page is an order for an additional backdoor, which seems to be different from a cover (if one is to judge by the image shown).

Can you please shed some light on this issue, perhaps whether or not the cover is still available and if the workaround is still possible?

Anubis Black 2012-12-24 23:44
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Just a quick question regarding mugen covers. Going to the provided link and searching for HLI-N900XL yields a single result, which requires you to buy a battery with the cover, so I guess this is not the correct procedure.

If I understand correctly, the suggestion is to follow the link provided and in the field "Battery Model and Cover Color" to put "HLI-N900XL" and in the "Your Battery Order Number" field to write "50002XXXX" where XXXX ranges from 0001 to 3000. Is this correct? What bothers me is that this page is an order for an additional backdoor, which seems to be different from a cover (if one is to judge by the image shown).

Can you please shed some light on this issue, perhaps whether or not the cover is still available and if the workaround is still possible?

sehrz 2013-01-06 06:43
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
hy i have buy polarcell battey on ebay but i dont know how to charge it full... so this is my output from lshal

Code:
battery.charge_level.capacity_state = 'ok'  (string)
  battery.charge_level.current = 8  (0x8)  (int)
  battery.charge_level.design = 8  (0x8)  (int)
  battery.charge_level.last_full = 0  (0x0)  (int)
  battery.charge_level.percentage = 91  (0x5b)  (int)
  battery.charge_level.unit = 'bars'  (string)
  battery.is_rechargeable = true  (bool)
  battery.present = true  (bool)
  battery.rechargeable.is_charging = false  (bool)
  battery.rechargeable.is_discharging = true  (bool)
  battery.remaining_time = 18000  (0x4650)  (int)
  battery.remaining_time.calculate_per_time = false  (bool)
  battery.reporting.current = 1155  (0x483)  (int)
  battery.reporting.design = 1267  (0x4f3)  (int)
  battery.reporting.last_full = 0  (0x0)  (int)
  battery.reporting.unit = 'mAh'  (string)
  battery.type = 'pda'  (string)
  battery.voltage.current = 4081  (0xff1)  (int)
  battery.voltage.design = 4200  (0x1068)  (int)
  battery.voltage.unit = 'mV'  (string)
  info.capabilities = {'battery'} (string list)
  info.category = 'battery'  (string)
how too charge it full?
i have this script :http://talk.maemo.org/showpost.php?p...postcount=1176
is it safe to use it!?
or is it full to the end, just not calibrated chip.
So says a different measurement

thanks
ps: sorry for bad language :p

shadowjk 2013-01-06 11:36
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
The normal battery meter does not use the chip.
The normal battery meter is not very good.

If the green light came on, then the battery is full, even if normal battery meter says 91%.

sehrz 2013-01-06 11:43
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by shadowjk (Post 1311457)
The normal battery meter does not use the chip.
The normal battery meter is not very good.

If the green light came on, then the battery is full, even if normal battery meter says 91%.
thank you :)

:)

enekux 2013-01-07 21:20
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by Anubis Black (Post 1307394)
Just a quick question regarding mugen covers. Going to the provided link and searching for HLI-N900XL yields a single result, which requires you to buy a battery with the cover, so I guess this is not the correct procedure.

If I understand correctly, the suggestion is to follow the link provided and in the field "Battery Model and Cover Color" to put "HLI-N900XL" and in the "Your Battery Order Number" field to write "50002XXXX" where XXXX ranges from 0001 to 3000. Is this correct? What bothers me is that this page is an order for an additional backdoor, which seems to be different from a cover (if one is to judge by the image shown).

Can you please shed some light on this issue, perhaps whether or not the cover is still available and if the workaround is still possible?
Hi "Anubis Black",

approximately one month ago I followed the steps you are mentioning and I got the proper cover for my N900. So I guess there wont be any problem if you do it so. I hope that with this message you will feel encouraged enough to buy it :)
Regards

Xagoln 2013-01-11 04:35
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
I have a Scud battery I bought in a Scud shop in Dali, China thinking it was the famous Scud of this thread. It says 1700 mAh, but turned out to be a lot less.

Anyway, recently I used by phone until it fully discharged, and now I'm unable to charge this battery again. Does anyone know why this might be?

enekux 2013-01-11 12:55
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by Anubis Black (Post 1307394)
Just a quick question regarding mugen covers. Going to the provided link and searching for HLI-N900XL yields a single result, which requires you to buy a battery with the cover, so I guess this is not the correct procedure.

If I understand correctly, the suggestion is to follow the link provided and in the field "Battery Model and Cover Color" to put "HLI-N900XL" and in the "Your Battery Order Number" field to write "50002XXXX" where XXXX ranges from 0001 to 3000. Is this correct? What bothers me is that this page is an order for an additional backdoor, which seems to be different from a cover (if one is to judge by the image shown).

Can you please shed some light on this issue, perhaps whether or not the cover is still available and if the workaround is still possible?
Hi there,

"Anubis Black" approximately one month ago I ordered just a cover from Mugen for my N900 following the same steps you are commenting and I did get it without any problem.

BTW I have done a dual battery with Polarcells and it really rulez!!

Thanks "dr_frost_dk" for sharing with us your knowledge and tests and also to the community. Much appreciated ;)

enekux 2013-01-11 12:57
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Hi there,

"Anubis Black" approximately one month ago I ordered just a cover from Mugen for my N900 following the same steps you are commenting and I did get it without any problem.

BTW I have done a dual battery with Polarcells and it really rulez!!

Thanks "dr_frost_dk" for sharing with us your knowledge and tests and also to the community. Much appreciated ;)

sEKI 2013-01-12 09:12
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
I know this thread is all about Do_It_Yourself but I was wandering how many of you guys would be willing to pay say £50 for ready made dual PolarCell battery (~3000mAh) with mugen cover. Free delivery in UK and extra charge for International...

If you are interested please use Thanks button, I don't want to clutter this thread with "count me in posts".
Thanks

dr_frost_dk 2013-01-13 13:37
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Quote:
Originally Posted by sEKI (Post 1313987)
I know this thread is all about Do_It_Yourself but I was wandering how many of you guys would be willing to pay say £50 for ready made dual PolarCell battery (~3000mAh) with mugen cover. Free delivery in UK and extra charge for International...

If you are interested please use Thanks button, I don't want to clutter this thread with "count me in posts".
Thanks
That's a good price sEKI considering that mugen takes much more for their crappy battery that has much less capacity.

Should i add you offer to the first post's?, just so you get a bit more exposure.

sEKI 2013-01-13 22:35
Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 
Well, since you've asked dr_frost_dk... :) I was just going to check "the market" and get some pre-orders maybe. Looks like I'll have some spare time and could possible make some dual batteries but if nobody's interested I'm reluctant to spend my hard earned money. ;)

BTW dr_frost_dk have you ever considered/tried building triple or even quadruple battery? Just ignore the fact that n900 would like heavily blown over muscle car... ;)


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