Related
Sadly i am still experiencing a crackling and failing BT connection while on the phone with someone after upgrading from 1900 to 3500 (it did improve on my side)
I dont think this can be resolved at the time, so its not really my question. (but if there is a fix, please say so )
My real question is this:
Is there any way to use this headset to listen music on?
So that if i play an MP3 the music comes out of the earpiece of the BT headset and not out of the PPC Speaker?
Come on guys, i cant imagine i am the only one who wants to listen to music through his BT headset
My understanding is that the Blue Angel platform is not capable of doing this. I believe that there is something called ADP2 profile that is necessary to make this work.
Rick
same problem here
Is there anyone out there who uses their mda in combination with bluetooth without problems like sudden disconnects or crackling soundz?
To: Sabofx
I am using a Plantronics M2500 headset with my PDA2K and it is not bad. I previously used the Jabra BT250 but there was so much static that I stopped using it.
With the M2500 I sometimes get a little static at the beginning of a call (but no where near as loud as the Jabra) but it generally goes away in a couple of seconds as long as I have 2 to 3 bars of signal strength reception.
I normally carry my PDA2K on my right side and wear the headset on the same side. Then when I get in my truck, the PDA2K is placed in the mount on my dashboard about 1 meter from the headset.
One thing I have noticed though, if I am talking on the phone via the headset and I am holding the PDA2K in my hand and moving it around at arms length the static tends to come back. If I place the PDA2K on my desk or in the car mount so it is stationary, the static goes away.
Also, in observation, there is no way I get more than 3-5 meters of distance before loosing the bluetooth signal. For example, I can keep a connection while I am putting gas in my truck but as soon as I walk about 5 meters away from my truck, I lose the connection. Also, ocassionaly I have lost the connection with my PDA2K on my belt (right side) if I have on a heavy winter coat. This only happens ocassionaly though.
Hope this helps.
i have an xda 2s with 1.13 radio and latest btooth stack and 1.31xxx rom
hi - its my first post over here but like many others been visiting for a while
my question is...
What range do you get with your BT Headset and if you have it in your left pocket and the headset on your right ear - does it work ok
i have a jabra bt250v and it is crap (yehhh yehhh read the threads here after i bought it :x and crackle continuosly)
which headset works best and at what range / distance (ps the jabra doesnt get more than 2 feet! - is this an xda 2s issue)
thanks in advance
I'm sorry to inform u bro that ur bluetooth headset is well functioning,and there's no problem with it....It's the BA bluetooth hardware that sucks!!!!!
This issue(BA bluetooth hardware) was discussed in many forums(not only xda-developers),with no avail unfortunately...(HTC is busy developing new devices,and not giving a $h*t to older ones like BA)
so bro,look no further for a bluetooth headset....it's not the cause.....
RAGO :lol:
darn
my wifes k700i phone works upto 30 feet away through 2 brick walls too
i was going to buy another headset but may sell this for a treo 650
really need a reliable hands free pda/phone
i thought the bluetooth transmitter was poor - seems i was right
its wierd as my navman bluetooth works 15 feet away - what gives
how does this work so far away the the headset wont
:shock:
anymore views on headsets v distance
i really want to hang onto this xda 2s if possible
tell me your experience
cheers
My Motorola 820 works 2-3 metres away, but no more than that. Its good enough for use in my car, so I'm not to worried
RAGOv said:
I'm sorry to inform u bro that ur bluetooth headset is well functioning,and there's no problem with it....It's the BA bluetooth hardware that sucks!!!!!
This issue(BA bluetooth hardware) was discussed in many forums(not only xda-developers),with no avail unfortunately...(HTC is busy developing new devices,and not giving a $h*t to older ones like BA)
so bro,look no further for a bluetooth headset....it's not the cause.....
RAGO :lol:
Click to expand...
Click to collapse
Yes, me too, BT250 phone one side. headset the other and it is crap.
It was soooo disapointing as my 2 previous Jabras were super, my BT100 working 40 feet from the phone I had at the time.
WEASEL
do you get static with the headset if it isnt in line of view
i can literally hold my hand upto my ear while being 2 feet away and it loses the sugnal
how does the 820 compare
Firstly, a correction; I have a HBH-300, not a HBH-820 (that's what my wife has) - my mistake
With the HBH-300, I get little or no static, but can have problems if the headset is not near line of sight e.g. if my phone is in my trouser pocket, I sometimes get disconnected. Whenin my car, I don't have a problem irrespective of which ear I use the headset in
Me too.... doesn't know abt this after i bought Moto H700, at 1st i thou sometime wrong with the earpiece, but nw i know is xda2s...really disapointed !!
what about this one does it enhance the bt
http://www.mobilephonecrazy.com/modeldetail/xda-IIs,Signal_booster.htm
I've used three SX66 vairiants of the Blue Angle and all of them have Crappy Bluetooth reception. You have to have the phone is your shirt pocket on the side where the headset is.
I know its not the headset as we have tried 4 headsets and they all work great with other Bluetooth phones. I can answer my Nokia phone from 2 offices down the hall with my Logitech Traveler. On my SX66 I cant answer it from my Cargo Pants Pocket with out getting masive static.
All the SX66s I've used are the BT v 3900...
Any Suggestions?
Same Friggin' problem
I have been up all night searching for an answer to this as I thought it was perhaps a problem related to upgrading. Then I remembered it was doing it before I upgraded. I wonder if it has anything to do with radio version, etc.
I would really, REALLY hate to go back to using the default earplugs that tangle if you think too hard.
Come on guys, is there a BT reception fix I'm overlooking? I was in a conference call yesterday from home and it sounded like someone was balling up candy wrappers in the phone on my end and the other's until I had to disable the headset and continue with the XDA IIs to my ear. :evil:
no bluetooth fix sorry.
radio has nothing to do with bluetooth
Reception really suck.....hope someone here can help....
I've been looking at this issue as well.
Per the nekkid blue angel pictures from the wiki, the bluetooth antenna looks to be a tiny chip looking thing...
Has anyone considered (or even did) replacing it with something a bit more substantial?
The wifi antenna is kind of small as well. GSM antenna looks OK.
try I Tech Clip II mini.
this is what I have been using for the past 4 months and has been great.
I have tried different types of Jabra BT, Mobile traveller.. none has worked and waste of money.
until i find this one... works great.
jdc said:
Per the nekkid blue angel pictures from the wiki, the bluetooth antenna looks to be a tiny chip looking thing...
Click to expand...
Click to collapse
Hi Jdc,
I cant find the pic you are talking about, if you could give me a pointer to where the bluetooth antenna is I see if I can come up with anything.
nuttja said:
Hi Jdc,
I cant find the pic you are talking about, if you could give me a pointer to where the bluetooth antenna is I see if I can come up with anything.
Click to expand...
Click to collapse
http://wiki.xda-developers.com/index.php?pagename=BA_Technical
and
http://wiki.xda-developers.com/index.php?pagename=BlueangelNakedPictures
I can't find the page that lists which one is which now (naturally once I'm looking for it, it hides), but IIRC the wifi antenna is that small clipish looking thing at D-20, the bluish one at H-20 is the bluetooth, and the big green thing at the top of the board (letters C-K, numbers 1-6) is the GSM antenna.
Looking closer at the board, it would almost appear that there is an external antenna hookup as well for the wifi?
If I didn't have a cracked screen, I'd take mine apart to find out. I'm worried that if I did, the screen would totally stop working. :-(
That seems a bad location for the BT aerial to me with the charge socket at the back and all that shielding above.
I read an article about moding a usb dongle :
http://www.pentest.co.uk/documents/bt_dongle_mod/bt_dongle_mod.html
I’m thinking maybe we could try something similar on the Blue Angel but with an internal aerial in a better location, a bit like these ones on ebay:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=200142840418
what do you all think?
nuttja said:
That seems a bad location for the BT aerial to me with the charge socket at the back and all that shielding above.
I read an article about moding a usb dongle :
http://www.pentest.co.uk/documents/bt_dongle_mod/bt_dongle_mod.html
I’m thinking maybe we could try something similar on the Blue Angel but with an internal aerial in a better location, a bit like these ones on ebay:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=200142840418
what do you all think?
Click to expand...
Click to collapse
Agreed, it is a bad location. Especially if one considers that often, one holds the unit in hand at that location, covering up the antennas.
Assuming that is the bluetooth antenna (I'm fairly sure it is, considering that is looks similar to the one in the dongle you linked to), I would think that it would be better to use one of those wifi antennas in the ebay link (or something similar) and try to keep everything internal to the phone. Since bluetooth does run on the same frequency as wifi, in theory, it should work.
No one wants to use a phone with a bunch of wires hanging off of it, otherwise why would we be complaining about the bluetooth range?
Now, if that other connector looking part is the wifi, the battery normally covers it. Unless there is a way to extend that to another user added jack, the same idea(s) for the bluetooth would apply.
I do not know how tight the clearances are inside the angle, as I've never opened mine. one would think that there might be a way to run the antenna wire on the inside of the back, or along the sides of the plastics. Perhaps around the GSM antenna area? Or would that cause too much interference to the phone/bt/wifi?
smtownsend said:
I've used three SX66 vairiants of the Blue Angle and all of them have Crappy Bluetooth reception. You have to have the phone is your shirt pocket on the side where the headset is.
I know its not the headset as we have tried 4 headsets and they all work great with other Bluetooth phones. I can answer my Nokia phone from 2 offices down the hall with my Logitech Traveler. On my SX66 I cant answer it from my Cargo Pants Pocket with out getting masive static.
All the SX66s I've used are the BT v 3900...
Any Suggestions?
Click to expand...
Click to collapse
Love the read about this, but there was quite a discussion about this problem when the BA was released. I argued it with orange for pretty much the entire length of my contract, it was a faulty bluetooth driver. and surprisingly enough O2 and t-mobile got it right with their XDAIIs and the MDA III firmware's but Orange didn't get it right till almost about a year or more later. needless to say it started working after i pugraded the firmware later on. since then i'm now runnign t-mobiles firmware on it with the o2 active program ( hahaha yea best of both ) and it's been fine for me. So look into upgrading to any of the offical roms from whatever network your looking for, if' you've already unlocked the phone, great as should remain unlocked, if doesn't just re-run the unlocker
cyberjak said:
surprisingly enough O2 and t-mobile got it right with their XDAIIs and the MDA III firmware's but Orange didn't get it right till almost about a year or more later.
So look into upgrading to any of the offical roms from whatever network your looking for
Click to expand...
Click to collapse
Mine is an XDA iis form O2 with the last offical O2 firmware wm2003 1.40.242 WWE on, I`ve also tried T-mobiles 1.42 and upgraded the radio to 1.15 but bluetooth still sucks with a headset!
Maybe you got lucky or maybe its the headset you are using.
Bluetooth reception
Has anyone got an update on this subject since Aug 07?
I have the SX-66 version (Cingular/AT&T)
I have had this phone Since the middle of 2006.
I have upgraded to what I believe is the most up to date programming mods that are available: (other than WM5/6, of which I have planned to do in the near future, I have tons of software and utilities that only run in 2003 edition and I would have to reacquire.)
BA---PH20B1
WM2003 2nd edition
Ver. 1.42.00 WWE
Build date: 09/05/05
Radio Ver.: 1.15.00
Protocol: 1337.45
ExtROM: 1.40.125 WWE
BT- PPC/PE Ver.: 1.0.0.3900
The thing about Modding the chip or placing an antennae jack IS that, all of which that is exposed, in the naked pics of the Blue Angel, are all in fact, canned and can be difficult to expose, to do any modding, without micro precision equipment and a steady hand. I have accomplished modding regular cell phones this way, however, this device is a bit more at risk and can get expensive and messy. I have a few boards, I have acquired through buying spare parts for mine in the case of accidents, of which I have performed with ALL the help of these forums. I will work on this, at this point IF you folks do not have any other alternatives, outside hanging pointless wires hanging around (me thinks that is WHY the bluetooth and wireless technologies were implemented?) With any success, I will report, outside failure, with some sort of procedure and details, that maybe someone with a bit more knowledge and expertise can modify to a possible easier closure on this REAL problem. Sure there are maybe better devices that can, maybe measure up to this Blue Angel, but I love my Angel, even with the flaws!
It has been a great challenge and all of the possibilities that XDA development has brought to the table.
In the last 2 years I have had this phone this is my FIRST posting.
The Bluetooth has been my ONLY real problem. I have to carry it in my shirt pocket using a BT headset and it is still really bad at that. I have used some of the best headsets and gone to great expense, to try and alleviate what I thought, by chance, that I could have finally found one that would superceid
the problem, however, to no avail, I still have the same problem.
If by chance that I could actually find a bigger chip, I think I would have to have the right drivers for it and will have to lead a command string, I am guessing through going to the kitchen and cooking up some ExtROM for the 'moddapplication'?
Blackberry has, I think, one of the strongest chips available. I have a 7100t that i could answer from 300 ft of a house with walls. My 650 isn't that good.
I apologize for being long winded, I suppose I am catching up from not communicating in the past, but I followed the rules of this site, and I haven't needed to ask a question and not needed to help someone else, because you guys have had the answers in these forums. Without further a'due........
Finally, if you have any FRESH ideas or direction on this bluetooth delima, outside using a can opener, .........***please***, let me know............
Best regards,
gcopher
http://www.michellebrown-and-mmd.com
I notice there is alot of disussion over BT headsets, and several threads adressing range/crackling/'static' noise .
However, none of them clearly identifies several BT headsets which won't have problems with using range with Universal - as our pet gadget definetly have it's own issues performing considerably worster then other BT phones / PDA-s with headsets.
So I would kindly ask you all to identify me few models of BT headsets you are using and which can normally communicate with universal in most common situations without crackling/static/disconnections.
I have used old Nokia HDW-3 - and it performed excellent, I could walk all arround the room, turn my head in any direction, stand in between phone and headset (even with universal) and it would sound flawlesly. However, I got the new headset X-sport - very tiny (less then 8g) and fitting me comfortably, but alas, when I charged it and tried to use it - it crackles even if my Uni is on the desk infront of me and I turn my head away.
Please advice on models I could mail order without fear of showing this flaw.
Dalm said:
I notice there is alot of disussion over BT headsets, and several threads adressing range/crackling/'static' noise .
However, none of them clearly identifies several BT headsets which won't have problems with using range with Universal - as our pet gadget definetly have it's own issues performing considerably worster then other BT phones / PDA-s with headsets.
So I would kindly ask you all to identify me few models of BT headsets you are using and which can normally communicate with universal in most common situations without crackling/static/disconnections.
I have used old Nokia HDW-3 - and it performed excellent, I could walk all arround the room, turn my head in any direction, stand in between phone and headset (even with universal) and it would sound flawlesly. However, I got the new headset X-sport - very tiny (less then 8g) and fitting me comfortably, but alas, when I charged it and tried to use it - it crackles even if my Uni is on the desk infront of me and I turn my head away.
Please advice on models I could mail order without fear of showing this flaw.
Click to expand...
Click to collapse
I am using Sony ericsson Stereo Bluetooth Headset HBH-DS970. The coverage and sound quality are excellent. It offers full A2DP funtionality with Windows media Player as well as pocketmusic. The hardware controls on this headset include Forward and previous track button (which really work with my universal with Darkforce Rom), volume control and an OLED display which displays the caller ID (number only). Voice dialing works perfectly. The earpiece looke like normal earphone (no buldging contraption on the ear like most bluetooth headsets.
Bottom Line:
Any radio freq. is line of sight. So if you turn your head and the two radios (Receiving & Transmitting) are not in LOS, it means that the signal needs to bounce off something else, or go through something, (in this case probably your Head ) which causes the signal to fade, hence the interference.
Laubscherc said:
Bottom Line:
Any radio freq. is line of sight. So if you turn your head and the two radios (Receiving & Transmitting) are not in LOS, it means that the signal needs to bounce off something else, or go through something, (in this case probably your Head ) which causes the signal to fade, hence the interference.
Click to expand...
Click to collapse
bluetooth range is also sometimes ROM specific
I'm quite aware that line of sight provides optimal radio connectivity. But in theory as well as in my experience, good bluetooth connection should be able to cope with such an obstacle as my head providing that distance is about 50 - 70 cm.
However, I guess that most of Universal users are well aware that our devices have inferior performance to most 'regular' mobiles on the market. Is it location of the BT module or ROM - I don't know - it would be great if it's ROM as it would make it relatively fixable. I'm using QTEK latest shipped ROM 1.30.77 WWE together with R.13.00 radio ROM - but willing to change if it helps.
However, by what I red in other threads on this forum, inferior performance is more likely caused by location of BT module in the device.
Thus some headsets which have better BT transmission and reception (more radiated power and better reception) due to their construction should provide us with better BT performance). Thus the 'field test' is only good pointer which headset to buy or not to buy. For me, BT headset which can't communicate from my belt to my ear when I break line of sight by my hand swinging while I walk - is unusable - I'll much rather wear a wire
I tried my old Nokia HDW-3 and it performed great. On the other hand I tried that X-sport tiny one - it was disaster. Now I'm waiting new examplar of good old Nokia as well as Jabra BT800 - I'll report about the field tests
I've tried two options with my QTEC 9000 and using Windows Media. I bought Motoroka S9: really nice concept with the BT unit embedded in the back of the headband, and the sound quality is excellent, and switched between music and calls easily, the track forward (but not backward) control worked, buttons easy to manipulate. Several drawbacks however: it becomes uncomfortable on your ears after an hour or so due to the the design and the hard plastic used (may depend on the shape of your head) and the phone mic only works through one earpiece not in stereo (this is stated in the documentation, it was not a problem with my setup). The fatal flaw however was the BT range. It worked fine when I hold the phone behind my head, inches away from the headset BT unit, but this was impractical for extended periods of time When I put the phone in my jacket pocket or shoulder bag, the continual breakup of the signal made it unuseable. The phone signal performed better but for music this has very limited success and certainly doesn't work as a mobile device, which is sort of the point.
I then bought a Sony Ericsson HBH DS200. The range problem is resolved, music streams fine with my device in my pocket, shoulder bag or briefcase. I can walk around a room and listen to music and make calls no problem, although the music signal drops out when blocked by my body and the distance is about 2m or more. The swithching back to music after taking or making a call is a bit flaky, sometimes i need to reset the devise again to reestablish the connection, but sometimes it works OK. No caller ID on the headset, no volume control, no track back/forward, so it's a bit basic, but after the previous experience, I'm just happy it works. The supplied earbuds are good, and you can unplug them and use anything else you want with a 3.5 jack.
Hope this helps.
Jabra BT800 Jabra BT250V Plantronics A510
The Jabra BT800 (or 810, whatever it was with the LCD) would not get very loud with my Universal. It also wasn't very secure. The LCD would have been cool though...
The Jabra BT250v was very secure, could get plenty loud (most times), but had crappy reception, and worse reception when/if an SD card was inserted. When I say crappy reception, i mean bad. At arms length the headset started having static. As far as I could tell it was only I who heard it, but when I started hearing static, the person on the other side couldn't really hear me.
Plantronics A510 is the bomb!! (in a good way). I have only had it for a few days, but it is super lightweight, gets plaenty loud enough, and I can walk almost 30 feet form the Universal and keep a connection. AND thats while I have an SD card in! It's less than $50 on amazon and is their #1 selling product! It has 1700+ reviews on the site, which I found impressive.
AllanonMage said:
The Jabra BT800 (or 810, whatever it was with the LCD) would not get very loud with my Universal. It also wasn't very secure. The LCD would have been cool though...
Click to expand...
Click to collapse
I can confirm the issues with the volume for noisy conditions. In that case I have to manually raise the volume on the headset.
In my silent office the volume's just fine, but yes, it could be higher by default.
I never experienced problems with the range or any disturbances.
With the Universal on my desk I can even wander around on my balcony, which means being about 4 meters away and having no direct line of sight.
With a direct line of sight static gets noticable at about 8 meters, which is living room couch to kitchen sink
I got the BT800 from a good friend who felt uncomfortable wearing it and he told me, that he experienced range problems if the phone was in his left pocket and HS on his right ear. He was using a, mmh, i believe a wizard at that time and the behaviour didn't change after switching to a btv 500 or 250.
This brought me to the theory that range problems in case of small distances are closely related to the belly size of the user.
EvilJogga said:
This brought me to the theory that range problems in case of small distances are closely related to the belly size of the user.
Click to expand...
Click to collapse
PRICELESS!!!!
So I've got a pair (if you can call it a pair) of Motorola Motorokr S9-HD Headphones.
I can connect them to the phone just fine, but when I cover the bottom portion of the phone with my hand the signal drops out completely and I was wondering if anyone else experiences this or if it's just me.
So surrounding the bottom portion of the phone (with the Home, Menu, Search and Back buttons) with my hand and the signal drops out. Headphones on, phone in front of me.
Same thing happens if I push the phone up against my chest/stomach, no signal. Sometimes to the point that it disconnects entirely.
Normally I would be like "no big deal, I just won't do that." But the phone being in either my front or back pocket causes the same effect, making them kind of useless.
So, end result, is it my headphones, my phone, or both? Can you test the headset you have and see how it works out for you?
I've attempted this on stock ROM with Root, Fresh 5.3, and DC 3.2.3 with the same results each time.
I tihnk the BT and WIFI ant's are on the bottom
teh CDMA is on top -- if i cover the top, i can go from 4 bars to 0 barz
if i cover the bottom the wifi drops a lot
i think the BT ant is pretty weak .. couldn't go more than 10 ft from a laptop doing audio streaming
i'll try the BT later on when i get home unless someone else gets to it first
strung said:
I tihnk the BT and WIFI ant's are on the bottom
teh CDMA is on top -- if i cover the top, i can go from 4 bars to 0 barz
if i cover the bottom the wifi drops a lot
i think the BT ant is pretty weak .. couldn't go more than 10 ft from a laptop doing audio streaming
i'll try the BT later on when i get home unless someone else gets to it first
Click to expand...
Click to collapse
Well if the BT antenna isn't on the bottom, then why is it when I put my hand over the bottom the signal drops?
I want to see if anyone else can replicate this issue..
I have the same headset. I tried everything you did and it works for me. I occasionally get a breakup of audio, but it is not related, however it is the headset.
Brutal-Force said:
I have the same headset. I tried everything you did and it works for me. I occasionally get a breakup of audio, but it is not related, however it is the headset.
Click to expand...
Click to collapse
Damn, that sucks. I hardly used the damn thing. Thanks for checking it out, I would have assumed it was the phone.
Sirchuk said:
Well if the BT antenna isn't on the bottom, then why is it when I put my hand over the bottom the signal drops?
I want to see if anyone else can replicate this issue..
Click to expand...
Click to collapse
i'm saying the tooth antenna IS (probably) on the bottom hence why you cover it up it dont work as good. sorry my grammer sucks
I would swap it for another one. While generally I find the headset to be a great improvement over past Bluetooth Headsets, I am still not impressed that after 15 years that bluetooth has been around that it has yet to impress me as a wireless medium.
This headset is still only class 2 and Bluetooth 2.0. Where are all of the Class 1 and Bluetooth 4.0 devices?
I have tried all the Plantronic, Jawbone and Numerous Motorola devices and have been left wanting. I will probably be returning this headset as well. Although it has good sound quality, the earbuds (event he smallest ones) are too big for my ears and they do not seat down inside like a quality pair of tips. The phone breaks up especially while on the phone, but for listening to music, it is in general quite a good device.
The biggest problem with going wired headsets is that people have quit making a good wired stereo heatset with mic.
well, I have had 20 or more BT headsets, and, the only one I have EVER had that played music without breakup is the Jawbone Icon..
Sure the sound sucks, its mono and tinny, but I never lose signal with pandora, slacker, or sd card music with this headset..
motorola s9HD was one of the worst ones I had for losing signal from my phones..agree that its a shame that no one is able to make a HQ STEREO BT lightweight headset that doesnt drop signal yet..
the backbeats are damn good for music, world better than my s9s. ive got the 903 but the 906 are supposedly even better
I have the same issue with the motorolas, not as bad as you but I do get the breakup if i carry the phone in front of me. I have the Shure 530 headphones which kick ass so I got a Sony BT Transmitter, I think it is the BT15 or maybe the BT30, works perfect for me, I clip it on the front of my shirt plug in the Shures and presto bluetooth. The receiver even has a built in mic, works about as good as the Motorolas.
http://www.google.com/products/catalog?hl=en&q=sony+bt15&rlz=&um=1&ie=UTF-8&cid=10714892124428811058&ei=YH43TJrnAdWfnwf_ob2ABA&sa=X&oi=product_catalog_result&ct=result&resnum=3&ved=0CC0Q8wIwAg#
I can't for the life of me remember which one I have but be advised one of them has a mini usb charger the other requires a specific cradle, i go the one that has the mini usb, didn't want to carry around a specific charger for this.