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

I don't have a script?, i use various external chargers to determinate battery capacity.

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

Auto calibrate wasn't created by dr_frost_dk, AFAIK, it's from joerg_rw. Instead of using charge*.sh, you could also do the same with kernel-power and Pali's bq2415 module (charging one).

Hoever, no matter of method, I don't see how *charging* with script/module as opposed to BME could help You with vdq going to 0 during *discharging*.

/Estel

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

Hello.

I don't know if this is common knowledge or not. But I have a Nokia BL-5J that came with my X1-00 I bought new from a store in NZ and it came with a 1430mAh Genuine Nokia BL-5J...

Anyway, I went to buy some Japods at our favourite site and they are "temporarily" sold out! :eek:

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

Its true, it not drfrost the script (my memory its bad sometimes). I will try some script and check if it solves my problem. Without dual-scud before calibration was ok, now its not because sensor chip thinks that my battery has lower capacity and gives me VDQ=0 when it thinks that is discharged.
If someone has an idea I will try it :)

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

Yes the new genuine BL-5J (Nokia) should have over 1400mAh as is printed on them, i would love to test one so i can add it to post #1, but can't really find one anywhere....

In other news im testing polarcell's new battery's and im seeing over 1500mAh!!!, in fact 1520mAh so it seems we might just have a new goto battery, that is not HARD to come by like the elusive SCUD's, they are becoming a hassle to find or just to find a supplier that stocks more then 20x, but Polarcell makes their battery's and this means that supply here should meet demand, also price wise they are cheaper then SCUD's, of course you don't get that Awesome pretty box....

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

I would let you have mine but I'm using it currently. It's got a number of cycles on it as well.

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

Not sure if I get this right but I had similar issue with my DualSCUDs. When fully charged VDQ was going to 0 before battery was drained. Somebody on this forum explained how to resolve it (Sorry I don't remember his name but he takes all the credit for it).

Now, because it's over twice the capacity of normal battery you need to calibrate your battery in phases. So charge your DualSCUDs until VDQ=1 and then no longer than an hour. Keep discharging until EDV1=1. I had to stop BME because it was turning the phone off around 3.5V.

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

Hey guys I found a potential source for Scud Blue Dreams here: http://www.camaras-espias.net/en/Nok...m-p184893.html
Does it look like the right thing? Seems so. Looking to get one of these.

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

Well can't see anywhere if it is the 1350mAh or 1450mAh?

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

D'oooh Right, I send them a message asking about whether it was the 1350 or 1450 version, they replied
"Hi thank you for your interests in our products
as it states in the description
Battery Capacity: 1001-1600MAh"

Oh well no help there.

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

Well we got a new goto battery, extensive testing on the Polarcell showed 1520mAh

So no need to go searching forever for the scud's, also if you live inside EU then no customs and such to worry about +pretty fast shipping

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

Have You compared cells (physically) to old ones? What caused increase in capacity? Are they more thick now, or they have changed chemistry a bit?

I'm just wondering, as we have already assumed, that it's quite impossible to make battery of such capacity, without going to "thicker" form, as it was in scud.

/Estel

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

Haven't measured but they look bigger, can't compare because the old polarcell went with a N900 i sold some time ago to a maemo user.

Doing testing i did one of the REALLY deep cycles and got a reading of 1550mAh and this is on par with the scud's, so the search is over for a source of "super" battery, this test was outside the normal parameters that ALL battery's has been tested, but when tested normally it got just over 1520mAh

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

I'm glad to hear that, but I'm little worried if it's not just this particular serie/unit being so OK. It would be great, if other users, buying from other sources, could confirm it.

BTW, where You have bought those tested ones? From link in 1st post?

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

Im not following what you are trying to say estel?

The battery i bought is from the link in post #1, and no need to search for places to buy polarcell since it is their own "shop" on ebay

-

In other news i just received a SCUD from enjoygadets and i ordered the 1450mAh but got the 1350mAh, so im not going to test it and im not going to recommend the shop or anything.


All i can say now it get the polarcell and take your chances if you get a SCUD, since Lucia Lui stopped selling we have not been able to get a STABLE source anyway, they either have sold out or like this you get the "wrong" battery.....

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

Scrap that. If you are still wanting this cell please let me know where to send it. It's got a number of cycles on it, usually not deep discharges. 60? Any use?

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

I'm just worrying, if Polarcell will keep producing/ordering batteries with such capacity, or, instantly, after few weeks, we will get report of decreased capacity of newly acquired ones, like we had with Scud.

I'm just wondering, because we have no idea, where Polarcell cells originate. Do they produce them? If yes, it would be great, but I suspect, that they're just buying cells and rebranding them. This mean, that they will have only, what is manufactured on some (probably chinese) factory, and capacity may change dramatically from one month to another.
---

Of course, it's possible, that there is no such danger, and everything will be ok :) As said, i'm just wondering.
---

anyway, isn't it good idea to change thread title (as Scud isn't back, apparently), and declare new winner in 1st page?

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

Well that makes it more clear :)

Polarcell produces they own battery's so in case of high demand they can make more ;)
So no re-branding or anything.

And i can't change the title?, i have tried several times and have contacted "staff", anybody know how i need to contact to change this....

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

PM Reggie he's about. Just commented on the football spam issue a few moments ago...

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

I'll have my freshly ordered Polarcell on Monday, I hope. I understand I can measure it on-device with some scripts. I will report my findings.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

Been testing the Polarcell as a primary battery, this is the first time i have been using my N900 with a single battery for over 1 year and im really impressed, of course i have to say i have been using it very lightly as i have been busy with lots things, but i got 48hours so far.

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

To which I have to add that the exact same thing has just happened to me with this seller, so this looks incompetence or fraud on the part of the seller rather than a simple accident.

I tried to e-mail them about it and the mail bounced, so I raised a claim with PayPal. I have been refunded in full in under eight hours, which must be a record.

This feels a bit unfair to the seller, but, if they've sent the wrong battery to two of us and their e-mail then bounces, well, **** 'em. Guess I'll go after a Polarcell instead...

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

Thanks, it's a good idea to get "refund" from ScamPal, as they've scammed me for 180 euro, once. I think I'll find seller of Polarcells that accept PayPal, buy 20 of them, and require full refund, then sell battery & profit...

Seriously though, PayPal is one of this *****y things, totally biased for buyer -, they will refund You without checking any evidence, or even in case that evidence says otherwise. It's good, that it helped You to get refund for fraud'ed batteries, but it should be also a warning for anyone, who accept any PayPal payment. Can't say how I hate this company.

/Estel

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

Just bought PolarCell one week ago, charged once to full and then measure the capacity today. Amazingly last measured discharge shows 1679 mAh! How is that possible?

However, thanks for letting us know what is the best battery on the market right now, without this thread I would never trust any other battery than original Nokia.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

It (probably) isn't. Look for Estel's original post on measuring capacity using bq27200 - the capacity measurement only reduces by a maximum of 12.5% on any one learning cycle. So, if it starts out at 2043mAH, which it often does from factory, or if you've previously calibrated it to a dual battery, then it'll be two or three cycles before you get a true measurement of your battery capacity. Repeat the same - charge to full and discharge to EDV1 - and you should get a measurement around the 1500mAH mark.

@Estel, your comments about PayPal are largely true - much like Visa or Mastercard, they cannot afford to lose buyer confidence or they and their brand are dead in the water, so they have almost always erred on the side of favouring the buyer. But it's by no means automatic - I've had to file 5 or 6 claims in the 8-10 years and several hundred transactions that I've been using PayPal (under 1% of my transactions have gone wrong) and in those cases where it's gone wrong, I've usually had to sit around for weeks whilst they await a reply from the seller, and in one case, a perfectly legitimate claim for items significantly not as described was wrongly decided against me. It's by no means as simple as complain and get your money back, except in those rare situations where a seller has been shut down for fraud.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

What are peoples opinions on "breaking in" a new battery.

With the older NiCd it was normally advised to fully charge and discharge a few times to get the capacity to it's maximum.
Is this still recommeded?
I have gotten in to the habit of charging new batterys for 12-15 hours before using them.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

with lithium no need to do that at all, i have all kinds of lithium for these tests and for electric vehicles and DIY flashlights amps etc...

No matter how you use them they will not have any weird effects like the old crappy NiCD/NiHM battery's, only 2 things to keep in mind:
Don't go under 2V (ill say 2.5V to be safe) and don't go over 4.23V then all is good.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

I will try again in few days (just charged today to full), however I already checked Estel's advice but it didn't applied to my case as my previous battery had around 1100 mAh.

Another interesting thing is that last night the battery discharged completely after I used it yesterday extensively (which was normal since I didn't charged it in the evening at around 20% left and I had running timenow app), and after complete discharge (probably it went to EDV1) I got in the morning the new value 1725 mAh. This should mean that the battery is really around 1700 mAh but I will confirm after next measurement I guess.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

yrannadx, if Your chip wasn't calibrated for 2000 mAh or more (as magick777 suggested), and You're sure that no other tricky glitch invalidated Your calibration, there can be only one answer - relative capacity of this battery (for Your use case) is that high.

Let me remind one thing - there is no such thing as absolute capacity of any battery, especially, LiIons. Measured capacity (properly called "relative") depends on many factors - discharge current, temperature, etc. In case of non-constant discharge current (like in any real-life use case for computers or phones, where You have different current usage every second, from 4-7 mA standby, to ~700 mA under heavy usage), it also depends on ratio of "high current "spikes" to low current ones, and even state of Charge, at which such spikes appear.

As a result, using device with lower current, or with more cells at one (like in dual-battery mod, where current for every cell is halved), you will get better capacity than expected.
---

That said, it's still quite surprising (not to say doubtful) result. Using dual-scud, which should total @ ~3000 mAh when new, my biggest results - due to moderate usage and benefits of dual-cell layout - were around 3150 mAh. It means, that due to mentioned benefits, my relative capacity was 150 mAh higher than expected (75 mAh per cell) - not anything groundbreaking, yet, still, nice to have.

In Your case, last report is 225 mAh *more* than expected, for 1500 mAh, single-cell battery, used heavily, as You said. That result would be ground-breaking, and would require ultra-low internal resistance inside polarcells, + some other voodoo doing its job.

While I remember shadowjk mentioning very good (low) internal resistance of polarcells (or was it japod? :confused:), it's still hardly to believe *so good* results.
---

Summary - I have no idea WTF ;) Give it 2-3 more calibrating shots, and keep us reported. It's very intriguing.

/Estel

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

I begin to suspect that either something has changed with bq27200, or something has really changed with the newest batteries on the market. With nothing to lose, I've been testing that 1350mAh Scud (that's already been refunded).

My rationale here was that the manufacturing date on it was 20120730, or about one year newer than the 1420mAh Scud that I previously had in use. That was testing at 1283mAh, so I figured if the 1350 was understated and would yield ~1400mAh, it would do as a stopgap.

So, I charged to full, discharged through 2 days of normal use, stopping BME when I hit 6%, and killing the last of the power on a 3G call whilst waiting for EDV1. bq27200 reports an LMD of 1657mAh, and this is on a phone that was reporting 1283mAh yesterday. This is unprecedented, other than by yrannadx's experience.

Yet I'm talking about a different cell, from a different manufacturer, with a different notional capacity, in a different N900 that I've been using for just over 2 years with 2 different batteries (original and Scud 1420mAh) and it's never reported THAT before. dr_frost_dk, maybe you'd be so kind as to test your 1350mAh Scud after all? We can't both be going mad...

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

It would be good to test exact same (physically) cell both in phone, and (2nd time) via external charger with such function. Maybe something is wrong with calculation of mAh from raw values, reported by chip?

But, bnf (and bq27200.sh) are using i2c to access raw values reported by chip, then, bnf calculates mAh internally, always doing it the same way. It doesn't depend on newest charging/measuring kernel modules by Pali, so updates to kernel-power shouldn't affect it (in fact, it doesn't require KP at all).

So, no idea what could have changed. For sure, our internal chips didn't, scripts too... WTF?

/Estel

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

A bit off-topic

That comment regarding NiCds and NiMH. They still make NiCD packs that go into space. My understanding is that the memory effect rumour was due to research where satellite batteries were exposed to exactly the same charging / cycling regime (no clouds in space) for the life cycle of the battery pack. If you can imagine a satellite getting the same charge every day which is dependent on it's orbit, that is when a "memory effect" comes in to play. If it weren't for the toxicity, NiCds would still be a viable battery technology except for watt hours per kg, or lack of them. NiMH tech is now so good due to the Eneloop--I guess many people will know this but "patent encumbrance large format NiMH" is hot topic amongst EV owners and I understand you are one of these people dr_frost_dk? Both of these technologies have cycle lives of over 1000 recharges, lipo is realistically 250-300 deep cycles?

I've made several AA (eneloop) NiMH battery packs for cellphones, they are just a bit bulky that's all. It keeps older cellphones going for much longer when their proprietary battery packs are no longer available. Just find a suitable resistor for the batt-sense pin and you are away laughing

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

independent
I know they are getting better but they still are not nearly what i need for EV applications, and i use LiFe battery's and here we also talk about 1500+ Cycles, i did use LiPo to start with because of price and easy to come by and worked just fine but LiFe is so much better in every sense, unless we talk about raw power then LiPo have the edge with 65-130C and they are still pushing that number higher and higher.

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

magick777
Will check the battery when i get the time, just a bit swamped right now.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

Been playing with my new Polarcell this week and there is a noticeable performance increase.
I can last 40 hours with my normal usage compared to 24 hours.
I know it's not raw data but I can compare between three different Nokia batteries and get about 24 hours.
Thanks for the heads up with the new supply of Polarcell's, they posted to the UK very quickly.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

After 4 days and 8 hours from last full charge, today I got LMD 1718 mAh. This time I controlled the discharge with some normal to light usage so that to be able to see if the phone will turn off when I would have around 200 mAh left (if the 1725 reported previously would be wrong). After bme reported 0% and low battery message I still had around 200 mAh left and phone battery lasted another few hours while keeping screen on most of the time for checking regularly the status with bq27200.sh.

So I would say that nothing at this point suggest the real capacity of this battery is not 1700 mAh.

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

Just bought the polarcell. 34 hours have been past since the first full charge and It's still going strong, about 20% battery left. Yappari was running in the background all the time. Quite impressive!

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

If not for the fact, that creation of aluminum body replacement sucked my funds (thanks to some wonderful investing/donating/pre-ordering people, I was able to buy the best parts for it, so I've put all my savings there, too), I would be already running dual-test on them (via external charger, and inside N900).

From all reports, it seems that they've created some absolutely impressive battery, huh?

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

http://i.imgur.com/jKVL4.jpg
http://i.imgur.com/IpGgo.jpg
http://i.imgur.com/k9FEC.jpg

I did this a few months back, finally got around to replacing the masking tape with electrical tape and taking a picture (finally got camera working, lol).

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

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 :/

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout
 

Yea, polarcell seems to be all-winner. Reportedly.