Bose qc20 new battery - how to change battery
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- เผยแพร่เมื่อ 6 ก.ค. 2018
- Sorry about the general quality of this video ,it is a one take video.
I know it is very heavy/dull to watch ,but it will show and
explain how you could replace the qc20 battery with a new battery :-) .
How to take apart the Bose qc20 :
• Opening | Changing bat...
The battery i use in this repair:
www.ebay.co.uk/itm/KOPFHORER-...
It is a 240mAh not 140mAh as written in the link
This is my succefully attempt to replace the battery in
the Bose qc20 in ear headphones .
Be aware of that this is not an easy task .
You need a good solder iron and a voltmeter to check
both batteries for the amount of voltage .
You have to either charge og discharge the new or the
original battery so they have the excat same amount of
voltage ,i do not know how much difference in voltage
the main pcb will accept ,but for your own sake ,do try to
get the batteries as close to the same voltage as possible.
I did all-so swap the tiny pcp from the original Bose
battery to the new battery .
Be aware of ,if you need to discharge or charge the
original Bose battery to get the same voltage as the new
battery ,you have to do this with the Bose qc20 ,
this is because the main pcb in the Bose qc20 all
the time holds an ”eye” on how much voltage is
left in the battery ,and that determines how much voltage - วิทยาศาสตร์และเทคโนโลยี
Thank you for this. It is very helpful. It also shows how clever Bose is to design a thing with planned obsolescence. They could have designed it with a battery that is easy to replace, but they could not do that because they would not make as much profit as they would by forcing people to buy a new headphone after one year. They also try to deceive buyers by not letting them know that they will not repair or replace the battery, even for a fee. If something happens within the warranty they will give you a new unit and throw the old one in the garbage, where it will probably end up in a landfill in some poor country. When I tried to get my unit fixed, I went to two different Bose shops and they both told me to go to the Bose Repair Centre where the repair could be done for a fee, although they could not tell the exact price, they mentioned a very low possible price for repair. They also gave a phone number for the Repair Centre, but the phone was never picked up. So I went there (which took a whole Saturday afternoon) where I was immediately told that Bose never repairs these things, they only offer a slight reduction on the purchase of a new unit. They will not even let you purchase part of the thing, you have to throw away the whole thing. In my country the battery is not even available, so you can't even try to fix it yourself. This is Capitalism. We need a better way of living.
Thank you very much.I'm glad that this could help you and i do agree with you .
Excellent video, without this point I would have gone blindfolded into the task, thank you!
You are very welcome .I'm glad that this could help you :-)
Hey man hopefully you replaced the battery and your anc is working but when you remove the battery to you take off the bose charging board? Or do you use the one that comes with the replacment battery?
Kim: I‘m still trying to figure out whether the original PCB board in the battery plays any role. When you eventually got it to work, was this with the BOSE-PCB ‚implanted‘ or did you go back to the original board which was in the replacement? Any idea what‘s the function of the white wire? I had soldered both (old and new) battery together (the two reds, the two blacks) and only left the BOSE-white connected. This way the charging worked and certainly both batteries were forced to the same voltage - but when I then removed the old BOSE battery and connected the ‚new-white‘, still got the red-LED error...it‘s a bit of a headscratcher...
Hi Josef . I am sorry to hear that you have problem getting the Bose to accept the new battery .
The way i did it (if i remember correct )
First check that the original battery fully connected to the Bose with all 3 wires still works and can be charged with no red led .
If it still works correct , measure the voltage of the battery in the Bose (with the Bose turned of ) ,then measure the voltage of the new battery (not connected
to the Bose ) ...depending of the voltage of
the new battery is more or less than the battery in the Bose you need to either charge the original battery that sits in the Bose or discharge the battery (just turn the
Bose on and let it drain until it reaches the new battery voltages ,all of this is because of the voltage sensing system in the Bose , the voltage state you have ,when
you de-solder the original Bose battery ,you need the new battery to have ,before you connect it to the Bose .
Very much hope this can help you .
By the way i am guessing the white wire is a form of either thermal sense wire or a over/under voltage protection wire ,i could only
find one dealer at that time that had the battery with 3 wires ,all other sellers had the battery with 2 wires .
I am not sure you can use a battery with only 2 wires ,but i have not tested it .
Does this model have a rubberized battery/electronics enclosure ? How did you disassemble the enclosure?
Hi Sam.
Yes it had the rubber cover on before ,i just removed it ,teared it off .
The enclosure consist of to half's that is pressed together ,no screws ,but
you must first remove the 2 little half pieces in both ends ( where the wires go
into the enclosure) before you pry the the enclosure open, and be very
careful when you open it ,the wires that goes into the enclosure consist of many tiny wires and you
could potentially tear them ,so be careful .
Thanks
Thanks. I'm noob :D Any tips on extending the wiring come out of the enclosure? I need to replace the audio jack but I want to extend the wire length first..
Sorry for a very late answer but no i do not know how to extend the wires ,they are very thin and seems delicate to work on .
My horror is ,that i have seen people whose Bose had the cable ripped either of the pcb board or some of the tiny wires had been broken
,i have worked on a couple of tiny things in my time but not with cables this thin ,i do though wish you the best
of luck in getting the wires extended.
Kim Nielsen thanks. Do you know which wires go where on the board? Left, right and ground. What colours are they?
@@delatroy I don't know how the wires goes on the pcb ,so i really can't help you with that .
When i disassembled the Bose i did not notice where the different wires from the cables was going on the pcb ,
i was only interested in getting the new battery to work with the Bose .
How can I find out?
@@delatroy I just did a search on YT and found this: th-cam.com/video/cB5zsSiW9MI/w-d-xo.html ...really hope this can help you .
Hi so how is ur new battery doing does it last for 16hrs? Or did u end up going back to the original battery like u mention at the end of the video . My 2 question or wat I dont understand is if u need to have the same voltage then shouldn't it mean that the new battery shouldn't work at all?? And not just when you try to charge the new battery?
Hi . The new battery lasted for approximately 16 hours in the beginning ,but after a couple of month it went down .I did use the Bose with the new battery for around 1½ year with no battery problem at all , i think in the end the battery lasted almost 7-8 hours and i have used it for 8 hours every day except in the weekends .My Bose unit broke at last after 4 years of everyday use with 8 hours of use 5 days every week .It was the headphone wires that got ripped ,and the wires are really tiny so hard to fix ,therefore i bought a new Bose unit .
What i mean with "that the new battery have to have the same voltage as the original" is ,that the original battery can fluctuate between 3.6v and 4.2 v and the Bose know how much voltage the battery have like always , so if the original battery have lets say 3.9v when you change it to the new battery ,the new battery need to have the same 3.9v otherwise the Bose will not charge it because it think there is a malfunction with the "original battery" ... i do not recommend soldering on a fully charged battery ,therefore it is a very good idea to lower the voltage in the original battery before changing it ...again you then have to have the same "lower" voltage on the new battery ....you lower the battery voltage on the original by turning on the Bose and measure the voltage ,but the battery need to rest before you measure it , it needs to have stable voltage before you change it .Sorry for the Veeeery long explanation but it is so hard to explain in short terms :-(
I don't understand u said u pulled down the volts on the new battery to same as the old original battery how do u do dat?
You can use any source that can run on a 3.7 v battery to drain the new battery so the voltage matches the original battery
,you could use a tiny motor or a LED diode ,but always be sure to check the voltage level when draining the battery and take
note of that the voltage level can rise a little after you have drained/pulled down the battery
Thank you for a great video, Kim. I am looking for a replacement of rubber casing/cover for the battery pack. The one on the outside. Do you or anyone else reading this know where I can find a replacement for that?
Thank you very much . Sorry i do not know where to buy the rubber outer sleeve .Maybe it would be possible to 3d print it in flexible tpu ? ,though it will not be as thin as the original ,it would still protect the casing .Maybe you could try to search thingiverse.com or printables.com to see if someone already have a design for Bose qc20 ?
@@kimnielsen9320 Thanks! I will check it.
will Bose replace it if you send it back to them? Why would you make something if you cant replace the battery WTF !
I have read in some forum long ago ,that
Bose at that time would replace the
battery, but it would cost too much in
comparing to buy a new qc20 .
My Qc20 is still going really well with
the battery i replaced ,i think it have lasted
way over a year by now and it still holds
current for about 8-10 hours continual
use .
Less "eeeeeeeeeh" in the future please. It's damn annoying.
don't disrespect dickhead