Nice! My battery was dead too. I did the same and used two "BAK N21700CG-50" for 6,49 EUR each. Samsung was sold out but Reddit said the BAK is good and has confirmed measured 5000mAh. This mod was cheaper than the original battery replica which cost about 19,95 EUR and only has 3000mAh and maybe even less. I did not install the original battery housing though but used multiple layers of Duct Tape to close the opening. I was scared that the sound would suffer but I can't hear any problems. Worked great! Thanks!

this is an amazing video. thanks for educating people in terms of repairing themselves in this throwaway products economy. Cheers! One thing I thought of was if one would design a 3D printed housing for 18650s or even other pouch cells, it might even be able to "replace" the old battery caddy. But nonetheless, great work. I would only improve on it by wrapping the new wires with foam in order to 100% avoid any vibrations.

Thanks a lot my friend! I tought this bms wont enable again, but as easy as to jump start it helps..?! Keep up the good work. Take care!

Congratulations Man excellent video.....👍👍👍

Amazing Video, I love this speaker, and it started having some problems with the battery lasting a lot less than it should, yesterday I played my music at Max Vol. and it just shut down refusing to turn on, thanks to you and this video I understand why, although I am not an Expert, and probably will buy a replacement Battery from Aliexpress and just replace it and not upgrade it like this video shows, I don't feel confident enough Sautering and cleaning the battery management board Thank you a lot, certainly a video worth liking, sharing, subscribing to the channel for

Great job ,Sir

Thank you! I managed to change the battery thanks to your video!

@TechBench

Жыл бұрын

This is great to hear - hope you have many more hours of listening pleasure!

Great video. Thank you

What a great video , thank you Sir

Nice work! 👍

For the adhesion I prefer Securistick instead of Genkem, tends to be a better gap filler, though I would have used some double sided tape there, to give more flex to attach to the chassis. 2 5Ah pouch cells would also have fitted in that volume well, and double side tape will keep them secure.

Great video! Thank you.

Great video. Hopefully you make one for Go Plus Play 3 soon.

@Alex.R.O.P

3 ай бұрын

You can use this video for changing the batteries, you just have to look for a good spot for the new batteries yourself and glue them similar to how he did it.

Great video

thank you my friend 👌

It's incredible. You messed up the sound by changing the amount of space with those accumulators...😱

@andreioprea6068

Жыл бұрын

If you think about it he took out the old battery

@TreviePatrick

Жыл бұрын

Oooooooooooooh

@alex_kar

Жыл бұрын

@@andreioprea6068 I wrote about the size of new batteries☝ This is very important for such a small portable speaker🧐 Any change in internal = sound distortion🥴

@pixelreflectorpro

Жыл бұрын

​@@alex_kar it would have to be a bigger change for that to happen

@Rando776

Жыл бұрын

@@alex_kar maybe taking out the old battery case would balance the size of the enclosure? 🤔 seems to be about the same dimensions when adding the new batteries together

Thank you!

Omg merci 🙏🏻

Nice, thnx 💪🏻🔥😎🙏🏻

Thanks for this! Just purchased parts as per your config. How long do you think the batteries will last at apr 50% vol with this setup?

@TechBench

Жыл бұрын

The official docs state "up to 8 hours", so just using the ratio of 5000/3000*8, I'd wager you could get "up to 13 hours" of play time. 🙂

@borninwinter9721

Жыл бұрын

@@TechBench Cheers! From a guy that didn't pay attention during physics.. Why isnt the calculation made with both batteries capacity (5000*2)?

@TechBench

Жыл бұрын

@@borninwinter9721 Excellent question. Battery capacity should ideally be calculated in Wh (or Watt-hour). You take the overall voltage of the battery and multiply by the battery capacity (5Ah * 7.2V=36Wh). Since the voltage is determined by the number of cells, you effectively include the number of cells in the equation. So really the stock battery has a capacity of 21.6Wh and the new battery is 36Wh. The ratio still works: 36/21.6*8=13 hours. The previous calculation I did works in terms of ratios because both batteries have a nominal voltage of 7.2V, which cancel each other out in the division.

Bravo...

am honestly surprised HK isn’t implementing a user-swappable pack like the newer JBL speakers

@ATP-Flo

18 күн бұрын

They don't want people to open and repair their devices but sell new ones after ~3 years when the battery is dying and the warranty is over. Not very surprising. I'm more surprised that JBL supports that.

Excellent job, Techbench. One of the most indepth videos I've watched for the process. I am glad that you have explained each process and trouble shooting with excellent video shots. I have a question regarding the battery upgrade i want use. The battery is a 7.4V 5000Mah /37 wh. The original you aware is a 7.4V 3500Mah / 22.2 wh. Will the difference in 37wh and 22.2wh affect the electronics. Shanal from South Africa.

@TechBench

10 ай бұрын

You're on the money with the 5000mAh battery - I used the same capacity batteries for my upgrade and they charge fine and play time is quite a bit longer. Charge time is also a bit longer, but that's probably okay. Looks like the charge electronics handle the higher capacity without issue.

@phyllisjailall4452

10 ай бұрын

Thank you for coming back to me.

@8DJpepo

6 ай бұрын

​@@TechBench Hello friend, I would like a battery just like the one you just put in the harman kardon go play. I have a similar speaker and that's why I would like a similar battery. Could you make one for me and let me know the price, my friend, thank you.

@TechBench

6 ай бұрын

@@8DJpepo I only attempt to demonstrate how it is done so that you (or a knowledgeable friend) can do it for yourself.

Genius

Hi, great video. Im currently in a process of replacing the battery on my go play speaker and im wondering if I can "jump start" bms circuit by simply charging the speaker because I dont have power source like u do?

@TechBench

9 ай бұрын

Unfortunately it seems that an external charge does not "jump start" the BMS. However, it would depends on the last state the BMS was in - if was active before you started the upgrade, it _should_ still be active after the upgrade. In terms of the power source, it really does not have to be anything special - as long as it's around 7V, you should be fine (e.g. a 9V battery with a diode in series to drop the voltage to 8.4V should do the trick as well).

Thanks for the video but I have a question. Can I use 4 piece of Samsung INR21700-50E batteries shown in the video to create a battery with a total of 7.4V and 10,000mAh by using the same circuit and use it reliably?"(2 parallel-serial-2 parallel)

@TechBench

10 ай бұрын

It's a good question and one that I don't have a good answer for. I _suspect_ that it will work, but might be right on the edge of the capacity of the charger. Ultimately, the best would be to just test it. The charging time would be fairly long though! At least three times as long as the normal charging time.

Hi, What was the trick used to enable circuit by 7 volts? I'm also having same point. No power out from the circuit.

@TechBench

Жыл бұрын

Just apply 7.2V (no more, no less) to the output of the circuit to re-enable it again.

I've got a charger, it was brand new, kids got a bit of drink in it and dropped it, but plug it in the wall and it seems it's charging and if u plug usbs in exile it's in the wall, all 3 sockets will charge any phone but the second u pull it out of wired power it's dead, ive taken it apart and I can't see anything that stands out, bar the bit of milk near the power button, but as I said, the power comes on when u plug the power bank in the wall as if to charge it itself....

Thank you sir for making this video, it really helps alot. I want to know that after upgrading the lipo battery with li-ion battery, does this speaker works well at full volume ? Should I need to worry about C-rating of li-ion battery ? Please reply

@TechBench

Ай бұрын

Yes, it works well at full volume (to the end of the video you can see where I did a high volume test - muted, so that there is no copyright strike).

Thanks for the video . Where can one buy the original rechargeable Samsung batteries and what are the specs?

@TechBench

Жыл бұрын

You do not mention which country you are in, but you can start at "18650 Battery Store".

Amazing tutorial! Is it ok if I changed the original with 2xPanasonic NCR18650B 3400mah?

@TechBench

Жыл бұрын

Those would be perfectly fine. Just make sure you get battery holders has well, because you must not solder directly onto the Lithium cells.

Can this one be used as a sound system for PC with power supply always plugged in? Or will the battery get messed up from that type of use?

@TechBench

7 ай бұрын

Unfortunately keeping it plugged in (and fully charged) will result in a gradual deterioration of the battery. I would not recommend this speaker as a long-term, permanent sound system for a PC.

Hi! @TechBench, 😜 I need your help: how did you unsolder the remnants of the original battery mount? I can't do it, and it's really bad to solder anything on top of them. I think I overheated the board during this process, because now the output shows 2.5V, however, if I measure the voltage directly from the batteries, it shows 7.4V as it should. the speaker, therefore, does not switch on, but still works on battery and the charge sensor shows 4 divisions out of 5

@TechBench

6 ай бұрын

Oh dear! I set my soldering iron for 350°C then just added small amount of normal solder to "get things flowing" and then just flicked the remaining pads off with the tip of the soldering iron. I hope your board is okay!

@foksdj

6 ай бұрын

@@TechBench Thank you! I'll try taking them off at a higher temperature. Also, I ordered a new BMS board with balancing, because it seems that the original board doesn't have balancing, and that's the reason why the battery fails as one of the parts gets overcharged

brillant ! the sound power is same as before ?

@TechBench

Жыл бұрын

Yes, sound output power is the same as before.

@damarisluca4763

Жыл бұрын

Hey, hi! But, one more question about this. While wall plugged, the speaker is playing a bit louder (at least mine does). So I wondered, is there a way to make it permanently louder, even when is not charging? By putting in baterries with higher discharge rate, for example.

Great video! I have this speaker. I have a problem where it is turning off by itself randomly. Pushing the power button turns it back on right away, and it stays on for sometimes an hour, sometimes 30 min and sometimes shorter than that. This occurs whether it is connected with power supply + battery, or without power supply on battery only. And also when I opened it up, disconnected the battery pack and plugged the power supply in. But it will still shut down randomly. From what the naked eye can see, everything looks to be in order. No bad smelling components or anything, it all looks "brand new". I cant seem to find any related information about my issue other than i might be a faulty mosfet. Am i going in the right direction? If anyone has had this problem and found a solution please let me know

Hi where does the other end of single wire that is attached to the inside of the cover go please I'm putting it back together and don't know where it connects to. Thanks

@TechBench

Жыл бұрын

It plugs into a UFL connector. If you do an image search on "ufl connector" you'll see the tiny round outline with a golden pin in the middle.

@carlodellamico

Жыл бұрын

@@TechBench thanks for the reply and information. I ended up finding it after all 👍

Is it possible to use with this charging board 4 or 6 26650 5000 mAh batteries?

@TechBench

2 жыл бұрын

Phew, that's a lot of capacity for a small board. But if I understand you correctly, you want to use six cells and put three in parallel, connected in series to three others in parallel. I suppose that can work, since the charger itself will limit the current, but your charging time will take five times longer than with the standard cells. It might represent a risk to the charger having to charge for such extended periods. There would also be an issue about physical space inside the Go Play. I'm not sure it would be worth it - on just the 5000mA cells alone I get a whole day's worth of play time, then enough time for a recharge for the next time. Of course, your use-case might differ - for me, I only use my Go Play on certain occasions - the rest of the time I'm behind my desktop PC with its own powered speakers.

I'm also having issue with my Go Play. When I plug it the power button lighted up but within a second it turns off. How can I solve this issue? by the way, is there a way to operate this device without a battery?

@TechBench

2 жыл бұрын

Does it do this even when plugged into its 24V power supply? What does the battery indicator lights show those first few seconds?

@nissanoo0393

Жыл бұрын

@@TechBench same problem here, and yes it turns off when plugged in aswell, when connected through aux it will play for that 2-3 seconds and turn off..

@SPereJ

Жыл бұрын

@@TechBench No I haven't use 24V charger if I use that will it fix the problem?

Hello folks: thanks for your tips. Now I'm not to to sure as some stated above the volume cabnet size smaller. Snice i have mine soon to rip open again jacks sticks out and gets hit and bye bye jacks. May place them on top and add some damping material to the insize. Now the my question. How much weight if any should be added the the passive driver. Got to fix the weakest link in the chain. Ride Easy

@TechBench

Ай бұрын

To be honest, I don't think any additional weighting needs to be added to the passive driver elements. Differences will likely be negligible.

Does the magnetic field affect the batteries because the batteries are close to the speaker?

@TechBench

Жыл бұрын

Not from what I've seen. I tested my other Lithium batteries now against a strong magnet and there is some attraction, but only when held against it. The speaker magnets seem to be far away enough.

I know You had 1 screw left over and I know where You have to put it in and screw it tightly At the back /under the Go & Play speakerbox, You will see an ajustment screw for leveling the hightstand of the box. The one in the middle where You already screwed rhe metal screw (with the fine treath). Unscrew that one and than You will see the hole for the screw You thought it was from an other project😂. After that done, screw the hightstand back in place again. I know the feeling when You had something missing or leftovdr😢😢😮

@TechBench

3 ай бұрын

You're right, of course! I did notice the missing spot a bit later on, but by then the video had already been published. I should make an amendment in the description.

What do you think causes the battery to fail so early? Is it the poor quality of the battery or the use of charging or anything else?

@TechBench

2 ай бұрын

One cause is certainly a poor quality battery, but a linked cause is related to a badly designed charger. From what I can see, the charger never cuts of charging current to the battery, even when it's completely full. This stresses the battery and makes it fail earlier than what you would normally expect.

@berksalihyldz5676

2 ай бұрын

Well, have you measured the empty battery voltage? Could the battery be discharging more than it should?

Could I use a higher mAh batteries for a longer playtime?

@TechBench

Жыл бұрын

Yes you can, like I did. I went from 3000mAh to 5000mAh. Just be aware that your charging time will then also increase and if you go too big, the built-in charger might not be able to fully complete the charge.

I installed 21700 batteries but bms didn't start. I have a question. Do I need to apply a current equal to the total charge of the batteries? I just don't understand why bms won't start?

@TechBench

Жыл бұрын

Note where I apply 7.2V to the _output_ of the BMS, just briefly? That's to activate the BMS protection circuit again. If it's still not activating, measure both the input and output voltages to the BMS.

@bolovnyakin7466

Жыл бұрын

@@TechBench thank you for the work you do for us

@bolovnyakin7466

Жыл бұрын

@TechBench @TechBench I put 2s5p battery. I got 25000mah. I use a complete charger 19 volts 3 amps. 48 hours have passed, but the harman is still charging and not fully charged. Do you know what could be the problem?

@TechBench

Жыл бұрын

@@bolovnyakin7466 Phew, 25Ah is a lot of capacity. Have you measured the voltages on the battery itself (and also the voltage level after the BMS)? It should reach about 8.4V and stabilize - that should then also be the level at which the H/K shows "full" on the LEDs.

Nice job! I did exactly the same thing but one thing you missed, lenght of the cables should be the same specially for when your listening on high volum the power consumption will be imbalanced a bit.

can you put a big capacity power bank in it?

@TechBench

Жыл бұрын

Unlikely, because power banks generally do not have the 7.4V output required by the speaker.

is there any problem about charging the speaker?

@TechBench

8 ай бұрын

I've not seen any specific issues in charging, especially after the upgrade.

I've been wondering this for years now so I would really appreciate if someone took their time to reply, my question is this: When my HK go+ (same speaker as in the video) is connected to my bluetooth source (doesn't matter what I'm linked up with), and I don't play any sound (for example pausing a video or song, searching for a song, etc) my speaker is making a light buzzing sound, it sounds almost like a fan spinning, it disappears only after like 60sec when the speaker gets into some kind of power saving mode or whatever. The speaker have been like this since I bought it... Have anyone any ideas of what the problem can be?? its really strange, and I can't figure out what it can be... it almsot feels like the speaker standard setting is on the loudest setting, and its because of that it makes the buzzing sound to, but I don't know... its always super loud volume as well when I power it up, as well when searching for Bluetooth devices, its super frustrating. Thanks if you read this, my English is pretty bad..

@chato166

Жыл бұрын

I have the same issue, and changed the battery for a new one and i still have the same sound super annoying hope someone know how to fix it 😢 It is a great speaker after 3 years it started making that sound

@Axel.U

Жыл бұрын

@@chato166 I’m sorry to hear that 🙁, I’ve tried removing the battery all together to just use power from the wall, but the issue remained, no difference at all sadly. Is your speaker set on a super loud volume every time you start it up? Mine is… it’s so frustrating, I have to mash the volume down button at startup to not wake everyone up or annoy my neighbors. Mine has behaved like this since I bought it or as long as I can remember at least, I regret not returning it when I had the chance, now the warranty is out.

@chato166

11 ай бұрын

I’ve tried everything, it blew out one tweter i thought that was the issue but no, removed it, and nothing, removed the battery only AC power and nothing i’m thinking maybe the integrated amplifier could be the issue but who knows

Hi 🙂 I think this might be the right place to ask this question... If I want to use this speaker in a stationery way, Can I use it plugged in all the time? Will this not mess up the battery? Or should I charge the battery and then plug off and charge again when it's empty and so on... Thank you 🙂

@TechBench

7 ай бұрын

Another good question. From my own experience, it looks like the charging circuit will kick in the moment the battery drops below a certain voltage. This means the battery will constantly be charged, which will (unfortunately) reduce the battery life fairly quickly.

@jaceks.3125

7 ай бұрын

@@TechBench thank you very much for your answer 👍🙂🙂

@yamahaevo

5 ай бұрын

Try to keep it at about 75% charge when not using it for a longer period.

@jaceks.3125

5 ай бұрын

@@yamahaevo thank you 🙂🙂

@TechBench

5 ай бұрын

@@yamahaevo This is good and true advice. Lithium batter manufacturers all ship their batteries with a 50%-60% charge, since that's where they last longest and the cells are least stressed.

thanks for the video. my problem: I habe enabled the bms and if I plug it into the box, it drops back to 0V and the box of course won´t work. When I unplug the bms, it does have again 7.4V between P- and P+... Can someone help me please?

@TechBench

7 ай бұрын

When you plug it in and the output drops to 0V, what does the individual cells measure? Are they balanced?

@bjoern20000

7 ай бұрын

@@TechBench thanks for your answer... Yes They both have 3,78 V (only 0,1 V Differenz between them)

@bjoern20000

7 ай бұрын

Also when additionally plugging in the power adapter, the BMS blocks the Volts. When I unplug the BMS plug, it allows the Voltage to pass through again. Really weird in my opinion

@TechBench

7 ай бұрын

@@bjoern20000 Strange indeed. I wonder if the battery pack might have developed a low internal resistance. Without some additional data (such as current flow to/from the pack while under charge and while not) it's going to be difficult to know the exact cause.

@bjoern20000

7 ай бұрын

Thank you again. Now I measured directly on the box and I have 0 Ohms between the 2 upper and two lower pins, so it's a short circuit. Now I have to identify the defective component.

I changed my battery with two 2650 and getting output of 7.2volts. However my harman is still showing red on the battery level. Tried charging but still on red. What could be the problem. Have checked even the output on the board

@TechBench

2 ай бұрын

When fully charged, you should see 8.4V on the battery output. If the battery level indicator still shows red, then there is a problem with the sensing circuit in the HK itself.

@raymond3545

2 ай бұрын

Am able to see 8.2 but its still red

@raymond3545

2 ай бұрын

If i unplug from power it just goes off

@raymond3545

2 ай бұрын

Which part is the sensing circuit

Why dont you use new battery (same size)?

@TechBench

5 ай бұрын

Three reasons: 1. I live in a country which does not have easy access to any of the overseas markets 2. Simply replacing the battery will inevitably lead to the same problems again in a few years 3. This way I get an upgraded capacity and much higher quality batteries (that should last longer than the stock battery).

Umm, the pokies on the old battery box need to face towards the rear. See 5:50.

I tried changing the battery of my speaker and it still dint blink the light..but when I tried connecting the battery without the BM board it showed red blinking light.. decided to plug in my charger and it was charging and it turned on ...but after charging for over 2hours, immediately I unplug the power supply it turns off immediately blinking the red light

@ikab5631

8 ай бұрын

My BMS circuit was already cut off before I started changing the batter...and I am unable to jump start it... Can it work without using a BMS circuit

@TechBench

8 ай бұрын

@@ikab5631 Unfortunately you need the BMS board in order to keep the two cells balanced, else they will quickly become unbalanced and break down anyway.

It's high time you buy an electric screwdriver, it will save you a lot of time, and wrist pain

Ok

Hi there, where are you based in South Africa, would you do a repair job like this on request?

@TechBench

Жыл бұрын

You flatter me Brendon! Unfortunately my time is extremely limited by my day-job and I would not be able to honour any repair within a reasonable amount of time. However, there are pre-made battery packs available, even in SA - search for "Harman Kardon Go Play battery" and you'll get a number of hits.

@brendonmanson-kullin8143

Жыл бұрын

Great video BTW👍👍

@brendonmanson-kullin8143

Жыл бұрын

Let me know if you ever change your mind for a paid job. It’s a very expensive paperweight atm😅

@brendonmanson-kullin8143

Жыл бұрын

It wouldn’t have to be a reasonable amount of time either, just as long as it oneday works again😂

p͎r͎o͎m͎o͎s͎m͎

I am so stupid wasted 25 euros on a 3000mah replacement battery and didnt think of just upgrading it to more capacity...

@TechBench

Жыл бұрын

I prefer to say that you've become much wiser in the process :-)

@StagnantMizu

11 ай бұрын

@@TechBench do you think running 2 in series and 4 parallel would fit inside? and do I need to hit use 3.7v batteries or wil 3.6 work too?

@TechBench

11 ай бұрын

@@StagnantMizu Two in series and four in parallel - so eight batteries in total? That's a lot of capacity and probably a bit much for the small charging circuit in the HK speaker. In addition, the charging circuit charges at exactly 8.4V, which means it balances out at 4.2V per cell. I'd stick to a maximum overall capacity of under 6000mAh per cell and definitely nominal 3.7V cells.

@StagnantMizu

11 ай бұрын

@@TechBench yes the idea was around 8 batteries to get 12000 mah in total so 2 series to get the right voltage(7.4) and 4 in parallel for a high total capacity. and then maybe buy an external charging circuit that can connect to the hk but not sure if that will work.

@Bxin718

9 ай бұрын

@@TechBench Why is it important that batteries are 3.7V nominal? Samsung batteries you used in the video were 3.6V nominal.