I've been checking out batteries for the Kaiser and I noticed something that I've never seen with other phones and pdas, the battery used in the Kaiser is a Lithium Polymer. If you're not familiar with that type of battery, its a battery commonly used for its lightweight properties and high current discharge rate (rate is based on battery of course). Most phones, pdas, electronics used Lithium Ion. For RC helis, Lithium Polymers or Lipos are very common and are treated with much care and respect. There have been a few accidents where Lipos have caused fires whether used in RC or being charged in the car and home. Lipos do not like being discharged pass a certain voltage, usually 3.0v and require balancing between cells which helps promote longevity. Since the battery used is only one cell 3.7 nominal (4.2 charged) balancing is not an issue, however complete discharge maybe another one.
Just thought I'd share a bit of information with everyone.
My old Sony Ericsson T68i used Li-Polymer also.
Many/most of the LiIon batteries in circultation for electronic devices today are LiIon Polymer batteries. The two types have nearly identical characteristics and performance properties. Both types of batteries can be extremely sensitive to heat and can produce a great deal. Both also have safety circuits when manufactured by a reputable company to prevent overcharging and the associated heat buildup and over use to prevent lithium plating which will effectively kill the battery. It's not at all uncommon for LiIon to be used to refer to both unless one is being extremely precise.
I wasn't aware about Lipos being used in other phones, good to know. I don't doubt manufacturers with proper safety devices as far as charging. Though I wish I could say the same about incidences from Lipo fires where reputable equipment was used to charge Lipos. My experience with Lipos have been with larger discharges and faster charging so I wouldn't think that we would have much to worry about. LiIons and Lipos are far as my hobby with RC helis and other vehicles stand as different as night and day, one being as safe as jello when abused and one being as dangerous as destroying a garage when neglected.
It's more a matter of degree. I've had a LiIon go "poof" in a cheap charger once. Luckily, I was sitting in the room where it happened so I could put it out before there was any real damage to anything other than the charger and battery. The polymers are more sensitive to heat, and have had a rash of manufacturing defects that have gotten lots of press.
If it's a quality battery and a quality charger, there shouldn't be many issues.
Related
4 terminals...
one plus..
one minus...
what are the other two? I read the service manual but didnt see anything.
Typically Li-ion batterys have the extra terminals to communicate with the battery about certain conditions of the battery. Typically it is connected to some thermisistor which is a resistor that changes resistance based on temperature. And it uses that change to calculate the temperature of the battery, because if the battery gets too hot it could explode. Li-ions are susceptible to thermal runoff which is why most incorporate this.
Hi
I was looking over the internet about news from MWC 2010 and I found very interesting video about powermat. They improved it and now is much better than was before. Watch the video (especially from 2:12) and tell me what do you think about it. Link - http://vimeo.com/9518999
Maybe they will do batteries for our HD2. I hope.
I am sorry for my English.
I would prefer the system the palm pre has over that.
What exactly is the powermat???
Pekolo said:
What exactly is the powermat???
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Wirelessly charge your phone
At the moment the power mat costs too much, if ever a battery is made for HD2 to use this, the battery cells will be smaller due to additional electronics that will be fitted within battery, so possible less battery life. Mat in present design (works on same principle as electric rechargeable toothbrush) does not fully charge batteries to prevent overcharge and heat.
You can buy an adapter that sticks to outside of phone/gadget so that powermat can be used with current phones/ipods etc., but expensive and will make a nice looking gadget ugly.
eaper and easier to buy spare battery.
Microsoft uPad looks lots better than the powermat, if Microsoft think and get it right they should include added features for windows mobile phones, this really would be the ideal charger for the new windows phone 7 handsets.
This thing is pretty ridiculous...
For the phones they have sleeves for the sleeve makes a very significant size increase, which doesnt make a lot of sense when you can just put the device on a cradle without any drawback in everyday life, and for the others you need to use the "universal adapter"... which does nothing but add totally useless stuff between the wall plug and device...
Why have wall plug -> mat-> "receiver" placed on mat-> cable -> phone when you can have wall plug -> phone?
And seeing the size of the "hump" at the back of the sleeve with the electronics in, it's actually larger than an HD2 battery, so no way to integrate it inside...
Huge WTF there. Anyway, there will still be people who buy it cause it's "cool" to charge wirelessly... with more wires than usual
kilrah said:
This thing is pretty ridiculous...
For the phones they have sleeves for the sleeve makes a very significant size increase, which doesnt make a lot of sense when you can just put the device on a cradle without any drawback in everyday life, and for the others you need to use the "universal adapter"... which does nothing but add totally useless stuff between the wall plug and device...
Why have wall plug -> mat-> "receiver" placed on mat-> cable -> phone when you can have wall plug -> phone?
And seeing the size of the "hump" at the back of the sleeve with the electronics in, it's actually larger than an HD2 battery, so no way to integrate it inside...
Huge WTF there. Anyway, there will still be people who buy it cause it's "cool" to charge wirelessly... with more wires than usual
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did you actually watch the video? somewhere in the middle they say that they will be producing batteries instead of all the other things soon. so the only thing you have to do is change the battery (still sleaves for the iphone) an put it on the mat.
It's brilliant technology, and it is still very very new. Hell, I remember being in a Physics lecture a few years ago and being told a proof of concept had been done, but the power transfer was negligible. I won't be buying one until they are cheaper / more efficient, but its a brilliant technique.
shu8i said:
did you actually watch the video? somewhere in the middle they say that they will be producing batteries instead of all the other things soon.
so the only thing you have to do is change the battery an put it on the mat.
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Yes, but being an electronics engineer a can tell you the coil and regulation electronics needed to capture the energy are nearly the size of the HD2's battery itself - so in the case of the HD2 if possible at all the battery would have a ridiculously low capacity.
So if they release self-contained batteries, that will be only for a few phones which have big enough batteries to put the electronics while keeping a decent capacity, which will obviously be reduced (and I really wouldn't want any smaller capacity on the HD2...)
And turn phone off, take battery out, put other one in, put empty one on a mat, reboot phone? Having to buy at least 2 batteries to be able to swap? Instead of just plugging a microusb plug? No thanks...
I seriously can't see a single advantage to this thing...
Many people complain about the short battery life of the HD2. Many complain about the bulkyness and uglyness of the extended batteries on offer. Many dream that a larger than stock capacity battery of the same size as stock will become a reality.
I am interested to know what is important for HD2 users, you cant have slimness with larger battery capacity, this is a law of physics. So tell me, if a solution came about that would significantly increase the battery capacity (beyond 2400mah), look good (not a lump on the back of the phone), provide a flat surface on the back of the phone, allow you to use your spare stock size batteries without the need to swap them all the time, with the only real compromise of doubling the thickness of the phone, would you buy it for a reasonable price (less that $50)?
I guess my basic question is, whats more important, slimness or capacity (lots of capacity I mean too, 3000mah+)?
I must say that I have never complained about the battery life when using Windows Mobile, even with heavy use I could get 2 days of life from it.
BUT since I'm now on a daily basis with Android, I must say that this is a problem, I can barely get to a full day with moderate to heavy use.
Now about you question, I WOULDN'T USE IT.
I like the size and feel of my HD2 (TMOUS one) and it happens that I have two extra batteries (bought because of android) even never having to use them yet I do change them and charge outside of the phone for easiness of not having to be near a wallplug everytime.
I just put those in the back of my phone to have an ideia of the size it would be with such an adapter. I would be inpratical to have this, so deep and big. It takes the easy and sleek feel of the HD2, to a bulky Kaiser (or more) stile.
Just buy a new battery, and if needed change it ONCE a day, ONE reboot in some sporadical day is better than a ALWAYS BIG phone wich is used to the full length of battery life rarely. .
My two cents.
Santroph
santroph said:
I must say that I have never complained about the battery life when using Windows Mobile, even with heavy use I could get 2 days of life from it.
BUT since I'm now on a daily basis with Android, I must say that this is a problem, I can barely get to a full day with moderate to heavy use.
Now about you question, I WOULDN'T USE IT.
I like the size and feel of my HD2 (TMOUS one) and it happens that I have two extra batteries (bought because of android) even never having to use them yet I do change them and charge outside of the phone for easiness of not having to be near a wallplug everytime.
I just put those in the back of my phone to have an ideia of the size it would be with such an adapter. I would be inpratical to have this, so deep and big. It takes the easy and sleek feel of the HD2, to a bulky Kaiser (or more) stile.
Just buy a new battery, and if needed change it ONCE a day, ONE reboot in some sporadical day is better than a ALWAYS BIG phone wich is used to the full length of battery life rarely. .
My two cents.
Santroph
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You get nearly a full day with moderate to heavy use? Since I put android on I barely get a full day with little use
Interesting, considering the amount of complaining about the battery life, slimness is still more important. I can see why these fake 1600mah batteries are selling like hot cakes.
Thanks for the input! Keep it coming, id love to hear everyone's 2 cents on this issue.
Extended batteries make the beautiful Hd2 look like crap.
To give an example: If you could bring a bulky backpack of energy drinks with you all throughout the day to give you more energy BUT you had to wear that bulky backpack 24-7 (even at the office at work, while your going to the bathroom, EVERYWHERE) would you?
I sure wouldn't. I don't care how much more energy I would have throughout the day...
The only people who need extended batteries are people running Android since it sucks down the battery like crazy.
battery extender a better solution.
i have a gum pro 4400mAh battery extender. it can charge the hd2 2.5x from flat and since it can deliver 1A, you can use the hd2 while it's being charged. its small size and the fact you don't need to power the phone down to top it up make it a more practical solution for me than any extended battery.
I like the slimness of the HD2 and I intend to keep it that way.
the slimness is just perfect in pocket...the hd2 is huge, but thankfully slim. if it would be both, i couldnt take it with me
and for me the extented one looks horrible..and i'm just a WM-User, so i have no batterydrainproblem
DN41
Does anyone know if it is possible to power the HD2 from the micro USB supply while I swap batteries. I don't want to have to do a soft reset which loses what you are doing. But I'm worried that without the battery to absorb the power there is a risk of damaging the circuits?
I don't want to just try it because I already blew my main board by powering the USB through a cheep adapter and a Nokia charger that supplied too much power and had I to get it repaired/replaced. I'm hoping someone already knows. :???:
Sam
geon106 said:
You get nearly a full day with moderate to heavy use? Since I put android on I barely get a full day with little use
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Get SetCPU and Autokiller. Make profiles with setcpu, and set autokill on agressive mode. Your phone should last more than a day with little use.
I was using my original battery for normal everyday use
and the extended 2400 ah with kickstand for times when I knew I would have heavy or extended use. Next thing I knew I was just leaving the extended in all the time. It goes days on a charge and is not noticeably bulkier in my pocket and I am slim and wear jeans. Actually feels easier to hang on to. Fits the hand better and all that juice is there whenever I might need it.
i voted battery capacity :
BC if u ran outta battery then the slimness will become just overweight.
but if u have battery capacity then it worth it !
(Just a Point Of View)
I bought an extra battery off of ebay for $5.
The Hd2's battery is small enough to keep it in my wallet.
Why would anyone not keep a spare battery in their wallet/pocket and instead use a bulky battery case?
HD2 outdoor
I know, one can look crazy taking out HD2 somewhere out there in woods, but i do like wild hiking, and i do use GPS occasionally for getting directions. And My HD2 with Garmin well serves for that. For the battery - in my case i care about capacity, as my backpack and front pockets have enough space for "bulky" extension.
For "going green" - I have a wind charger (a device which charges itself when you bike using the power of wind, and can be used as a charger for mobiles), but it can charge the phone only up to 60%. So the spare battery for 3-4 days walk is a must have for my case.
My point is - It really depends on your needs. I am pretty sure extended thickness is somewhat a burden in everyday life.
Cheers
Correction: The wind charger sucks! Do not buy it. It has major flaws which render the device not worth the price.
So after looking at the teardown and assembly info online, I've started to percolate a notion in my head to double the battery capacity of the NC.
My thinking is that if you sacrifice a bit of structural reliability by cutting out the portion of the plate the battery is on, you could cram another NC battery, scavenged from the ruins of a dead one, into there and wire it in parallel. The end result would be a heavier, probably slightly girthier, NC, with 8000mAh of life. I don't care how bright your screen is or how many rooted roms you're using, that fool will last a looooooong time.
My question is primarily for electrical folks here: any pitfalls to watch out for? Do we know if there's any circuits in the battery itself that might interfere or is the battery unit just a collection of Li-Ion packs?
Of course if you think I'm a mad scientist who must be stopped at all costs, please feel free to chime in too. Just stand over there on the scorched X on the floor next to the death ray...
Hmmm if the kernel allows for a charge higher than the one its in now. Like the evo charging issue with extended battery
Sent from my PC36100 using XDA App
BrianDigital said:
Hmmm if the kernel allows for a charge higher than the one its in now. Like the evo charging issue with extended battery
Sent from my PC36100 using XDA App
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Don't believe I've heard of this. Whassat?
loganthered said:
Don't believe I've heard of this. Whassat?
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Like he said: Whaa? I had an EVO [fun] but couldn't stand the less than less-than-stellar battery life. I'm talking dead by 4pm crap. Bought an extended battery and noticed no improvement. Is that why? Finally downgraded to an EVO shi[f]t [less fun] but I'm not getting the kind of improvement I would've expected going from a 4.6 to 3.6 inch screen, after all aren't they the biggest battery sucks?
sounds too scary for me!!! I think I'd rather just replace the battery (if it is possible to purchase one...)
The main issues would be....
1. extra strain on the charging circuit.
2. the possibility of battery imbalance...leading to extra strain on charging circuits...possible overheat...boom
3. possibility of overheating due to combined heat from 2 batteries during heavy charging...boom.
make sure all of those are taken care of and you are golden. Personally, I would source a larger amperage battery with similar dimensions and wire it in.
I like the idea, carry on
Why not just charge thru USB? Car adapter or external power pack?
UCSB said:
Why not just charge thru USB? Car adapter or external power pack?
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Because that defeats the purpose of bringing it a long for camping ;p or being marooned on an island with a black fog monster and a bunch of other idiots.
Just get the Energizer XP8000 and a little duct tape and you can get about 10+ extra hours out of it.
ExploreMN said:
Just get the Energizer XP8000 and a little duct tape and you can get about 10+ extra hours out of it.
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Which model do you recommend?
Duck brand duct tape is pretty good
Gorilla works well too
ExploreMN said:
Just get the Energizer XP8000 and a little duct tape and you can get about 10+ extra hours out of it.
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I have one of those, and yes it will charge the Nook Color on the go.
Just a little heads up on the topic, android stores battery info in the boot partition I believe and that's what tells the kernal the status of the battery, I.e. a double capacity battery would report as fully charged when only half charged if you didn't Pachelhoffer the is/kernal and such to match the new capacity.
Correct me if I'm wrong!
Sent from my NookColor using Tapatalk
use external battery pack
deadbot1 said:
The main issues would be....
1. extra strain on the charging circuit.
2. the possibility of battery imbalance...leading to extra strain on charging circuits...possible overheat...boom
3. possibility of overheating due to combined heat from 2 batteries during heavy charging...boom.
make sure all of those are taken care of and you are golden. Personally, I would source a larger amperage battery with similar dimensions and wire it in.
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Click to collapse
These are excellent points. I would avoid hacking the internal circuitry and instead get a hold of an external battery, design a circuit to drop the voltage to 5v and use the usb cable to charge up the battery. Trying to charge two batteries in parallel is asking for trouble because of the imbalance problem.
d.v said:
Which model do you recommend?
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For the price, I got the XP1000 I think (its in my backpack which I left at work) I actually got it for my Epic to charge when I was out and about and moved around too much to use a wall charger. Works on the Nook too, but I haven't tried a real charge to see how much I get out of it. I would guess if I can charge my Epic 2-3 times that I could at least recharge the Nook once completely.
Warning - be careful screwing around with the internal LIPO battery and circuits. If something damages the single cell battery or voltage gets to low, and you try to add voltage and amps to it, it might puff up and if it does its flammable!
Its a single cell LIPO pack like used in rc airplanes and cars! They are very finicky to say the least when it comes to discharging and charging. Let alone if you want to hook up another one to it and do it wrongly! People have burnt down there whole house at night just over charging one and not babysitting the charging progress!
It is a lithium-polymer battery and not a lithium-ion!
They can catch fire when they puff instantly, many videos on youtube!
Correct me if im wrong, but the battery has a built in monitor and charge stopper so if you were to charge both the batterys via the micro usb slot you would need some sort of trickle charge/sbc kernel mod to overcome this which could be a real pain in the arse and not to mention dangerous considering trickle charge has been known to damage batteries on occasion and we do not have an easily replaceable battery.
I have this unit, http://www.amazon.com/gp/product/B0038VQET4. It will completely charge the battery of the nook.
jerrykur said:
I have this unit, http://www.amazon.com/gp/product/B0038VQET4. It will completely charge the battery of the nook.
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And a lot of other things, I'd gather, judging by the number of "tips" it comes with.
Do you have any idea if it will charge an NC more than once?
i have heard that the embedded batteries which are found in HTC One and Iphone last longer since they are shielded from humidity due tot he zero gap construction of these phones
So is that true?
it does last longer but reason for that battery is Lİ-polymer
I highly doubt there is less humidity or that it could affect battery longevity.
Most mobiles have come with LiPo batteries for years.
I'd be surprised if they last appreciably longer than batteries in other phones.
Keeping the temperature down, charging more slowly and not deep cycling them are likely to have the most benefit.
in my expereince removable batteries actually wear out faster.