Meta Quest 3 BoboVR M3 Pro battery pack inductor noise mod
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- Опубликовано: 30 сен 2024
- Please note this will invalidate your warranty and I take no responsibility of any damage caused.
There have been a lot of reports of noisy batteries for the Quest 3 from users of the BoboVR M3 Pro head strap and battery pack.
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When the BoboVR battery is connected to a Meta Quest 3 which has a battery level over 70%, the battery emits a high pitch buzzing noise and crackling sound and this reduces when the Quest 3 battery is at lower charge levels under 50%.
The noise is caused by the DC to DC converter inside the battery and these often produce audible noise when not running at optimum levels such as when the VR headset is not drawing enough current or the current load changes quickly.
The sound is generated by the power inductors of DC-DC converters and the high frequency switching can cause them to vibrate which then generates sound.
In this video, I removed the cover from the BoboVR battery and applied a small amount of epoxy resin over the power inductor and onto the surrounding circuit board.
This dampens the vibration from the inductor and reduces the level of audible noise produced by the battery pack.
Take care when separating the two parts of the plastic case as it would be easy to puncture the battery inside resulting in fire or worse.
After the modification, the noise is still slightly audible but the higher pitch whine is much lower and less distracting when using the Meta Quest 3 headset.
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A workaraound to not have the buzzing sound is to only insert the bobo battery after your headset ist down to about 75% of it's charge. Worked for me :)
Sounds smart. I'll try doing both the coating and adapting my usage pattern.
Still sounds terrible. 😔
Nice job! However I'm concerned about how it affects it regarding temperature. Doesn't the epoxy prevent the capacitor from disipating heat? Doesn't it also make the vibrations to transform into additional heat? For how long or how many hours did you use the modified battery? Did you notice any problem? Thanks in advance! Awesome video.
I’ve used it for around 10 hours so far and 5 charge / discharge cycles and haven’t found any issues with excessive heat compared to the unmodified version
@@BrianDorey So it's time to grab the battery inside Quest 3 out. I think everyone is waiting.
Epoxy is drying, hoping for the best... Update: Didn't work at all. If any, sounds even worse. Thanks anyway.
Some report buzz coming from the USB port of the quest 3. Are you sure yours is from battery?
@@coolvinay100% Battery in my Case
The buzzing/clicking sound I got when using one these was by the USB port of the Q3.
Every battery and its charging technology has a sweet spot. It is between 25%-75%. It can be charged unthrottled to protect the battery. These sweet spots are controlled by the technology and are always a little different depending on the manufacturer. This means that if you hold Quest 3 in the sweet spot, the battery will no longer hum!!! Advantage, it is also healthier for the quest itself to keep it in the sweet spot. Full and low battery levels are bad for battery life. So I keep my Quest battery at 65% and have no more buzzing or beeping! My Quest 3 consumes 2% after 10 hours of standby, which is a good thing because the Quest 3 in conjunction with the headstrap battery charges the battery minimally when in use, and depending on the application, the battery lasts. So it's not difficult to stay between 25%-75%. From 75% onwards, the headtrap battery gets louder with every percentage increase. I haven't tested when its maximum is, but it doesn't matter. Sorry, Google translated into English for me.
I believed it when I saw your video, so I did exactly the procedure described but it didn't work, the buzz occurs especially when the headset is in autonomous mode and it comes from the battery and not from the usb
The only way to stop the noise safely is to not use it. The tech isn't made for the usb c pd system
I never heard a sound in my Battery is that like a new one
It is a new one.
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Nice work
Thank you.
Im more concerned that I have never heard this in the two batteries I have. I need to see an ear dr.
What is the exact cause of this buzzing? Too much stress? Poor circuitry, power delivery regulation? Unable to switch between trickle charge and fast charge?
Magneto-restriction of the inductor coils in the audible range. To reduce/prevent you either pot the coils to dampen or shift the frequency outside audible range or you design the boost converter properly to begin with so it's sized and specced not to make much noise to begin with.
Do you think Silicone would dampen the sound more than epoxy?
It might work better than epoxy
I have two bobo m2 batteries. One wont discharge at all when i put it on the quest. Doesnt beep doesnt turn on when i put it on the magnets. It will manually turn on though but wont charge the quest. The other discharges in 15 minutes from a full charge. Beyond warranty but lithium batteries shouldn't fail like this.
Are these poorly made, any fixes i could try? Im not going to buy two more guven they failed like this.
If you have a multimeter you could try removing the case and check there is continuity between the wires on the pcb to the output pads on the bottom of the battery pack. One 0f the wires may have come loose
Today I tried the M3pro for the first time with my Quest 3. No buzzing sound and 2.6amp. Seems like an upgraded battery. Brian, was your buzzing battery 3 amp?
The battery is a 5200mAh capacity battery, model B2 www.briandorey.com/docs/2023-11-25-bobovr-m3-pro-battery-mod-quest-3/battery-rear.webp
when I google for the B2 model I see pictures showing 5200mAh with 3Amp. My B2 sticker on the back of the battery shows 5200mAh with 2.6 Amp. What is your Amp? @@BrianDorey
Recieved mine yesterday with a 2,6A and it buzz. But i was above 76% battery when using the quest
Hi, can you create a video about changing the batteries? Are they 21700 or 18650, since there are batteries with higher capacity available?
I didnt remove the battery and so I dont know which model it uses.
@@BrianDorey There's no need to remove it, simply measure the length. The 21700 battery measures 21 mm x 65 mm, while the 18650 battery is 18 mm x 70 mm. It's likely that they are 18650 batteries, as both are rated at 5200 mAh, meaning each one is approximately 2600 mAh. However, the maximum capacity for a 18650 battery is 3500 mAh, allowing for a potential total of 7000 mAh. In contrast, the maximum capacity for a 21700 battery is 5000 mAh, so two batteries would provide 10000 mAh. This comes with a slight increase in size - just 1 cm in width and 0.5 cm in length.
@@mdzmzmDid you find out what size they are? By the way you made a typo with the battery length.
Is it possible to replace epoxy with a glue gun adhesive?
That might have a melting temperature which is too low, the inductors get warm when in use.
@@BrianDorey Yeah, you right. Thanks
@@BrianDorey Hey, one more question please. Do you think it might be possible to replace the 1R0 with a better inductor?
@@NightRockManyou could replace it but I am not sure if it would help with the noise
My Bobovr m3pro is on its way from China to me. I am curious if the newly delivered batteries have a fix already from Bobovr.
They arent new batteries thats the problem. They use the same batteries from the M2.
Got mine yesterday and it makes a lot of noise :/
The m2 batteries are not exactly the same as the one with the m3. The new one is marked with 2.6amp not 3 as per old one. No buzzing for me. Luck or flaw, im fine with it.
@@jazjac17 Problem isn't the amp its the volts. Needs to be USB Power Delivery with 9v/12v. with only 5v It wont be able to prevent the Q3 from draining during gaming.
@@chan13153 That is not my case. When starting with both Q3 and bobo at 100%, My Q3 stays at 100% for 80-90 mins on an updated game for Q3 and then the bobo battery dies, my headset is still at 100% charge. Only thing i have changed is not using the 120hz setting. If i am the only one with a satisfactory setup and no complaints about the bobo, well lucky me. Going from my experience, and not from youtube comments and testing. That said, i will not refuse bobo being bashed by media to produce a better battery pack that satisfies the masses and i will certainly buy it for a longer gaming time.
Is this an issue with only the M3 pro batteries? The batteries from my M2 have never had audible whine
It is the same battery on the M3 as the M2 but the current draw on the Quest 3 is a lot higher than the Quest 2
@@BrianDorey you might misunderstand me. I have my b2's on my quest 3 (I used a retrofit kit). I have 2 that I got at both the first release and one earlier this year. I use both batteries on the q3 now ,but I've never heard the whine from either. Maybe it's just something with the latest sku of batteries
It could be the newer batteries which have the issue. Are you putting the battery into the headstrap when the Quest 3 is fully charged or at lower levels? Some people have reported the noise only happens when the Quest 3 is over 70% charged @@ehjhey7
@@BrianDorey I always keep them on from the start of my sessions when both are at 100%
can you not use hot glue gun too?
batteries get hot and I think that it will melt the glue
@@yoanperez172 inductors can definitely get hot.
So cool! I didn't know it was so easy to fix it! Love this video!!
Glad it was helpful!
Really cool - *To the OP - did you consider conformal coating at all? That’s used on electronics all the time, wondering if it could produce similar results :). Thank you for this!
Using conformal coating may work. I dont have any to try which is why i used the epoxy resin
like anyone is going to go to those lengths lol
Its not difficult at all.
I wish the S3's battery could be taken apart this easily 😭
at least support sent me a new one