DIY Rechargeable 9V Guitar Battery with Micro USB Port

[@kirkbolas4985]

Excellent video. I’ve done this sort of thing on a couple of my guitars that I’ve added to built in effects and on my bass guitars with active electronics. Would appreciate you doing more of these DIY videos.

[@Weadababytsaboy]

Ok, so I have a pew pew preamp (stratoblaster) and the USB 9V battery gives a terrible buzzing noise. Anyone relate to this?

[@kirkbolas4985]

Did you wrap the battery with electric/electrician’s tape or some other insulating material? If not and the metal of the battery casing ends up touching any of the metal components in the control cavity or you also might have a grounding issue. In either case, you might have a noise issue like you’ve described.

[@Weadababytsaboy]

​@kirkbolas4985 thanks for the reply!! I figured out it was the milliamps output of my battery. It was 1000 milliamps. I also tried an inline capacitor, thinking it wasn't getting a consistent DC current but that didn't help. So I changed to one that was 650 mAh and it worked great!! 6:26

[@strelnikovpercussion]

just tried to put rechargable 9v battery inside my schecter and there was a lot of high frequency hiss, replaced battery to regular one and hiss is gone

[@ChurchCinematics]

@@strelnikovpercussion your miles will vary when it comes to rechargeable 9V batteries. The thing is, most manufacturers have a separate digital ground from the electrical ground. These companies aren’t testing for whether or not their battery adds noise to an audio signal.

[@CRP2426]

Beautiful! Elegant Guitar and solution.

[@jdcowles4763]

What about for acoustic guitars? I had a pickup installed in my Larravee parlor guitar and don't like how 9 volt batteries desintegrate over time. Looks pretty awesome?

[@venomousninetails]

If we can get a USB-C version going, this would be lit

[@ChurchCinematics]

I was just thinking the other day when I had to find a Micro-USB cable to charge the battery. 😂 Adafruit sells a USB-C version now. At the time of this video, they didn’t have one, otherwise I would have used USB-C. I’ll probably do an update soon

[@venomousninetails]

@@ChurchCinematics sounds good and looking forward to it.

[@udeadinasecond5245]

​@ChurchCinematics hello did you ever make plans for usb c version?

[@cesarsimon3143]

dude, this was a great, awesome idea, I'm trying to get a more shallow one, but thanks a lot!!!

[@christran2484]

Any luck finding a shorter cable version?

[@rockyshrestha]

I owe fender power stratocaster. Can I use the rechargeable batteries. Catalogue says no chargeable batteries

[@kirkbolas4985]

That’s because many rechargeable 9 volt batteries do not truly deliver 9 volts; they nominally deliver 8.4 volts. Most powered, on-board guitar gear accessories aren’t overly picky as they’ll operate just fine so long as they receive a minimum of about 7.2 volts (in my experimenting experience). Fender’s preamp may have tighter spec tolerances and as an 8.4 volt rechargeable battery’s charge depletes and the voltage begins to drop, it may quickly drop below the minimum threshold operating voltage of the preamp. If you open up a rechargeable 9 volt battery, you’ll see it’s made up of a number of smaller batteries that are wired in series. Each of these cells delivers 1.2 volts and there are 7 cells in total. This is why they only deliver 8.4 volts. There are rechargeable 9 volt batteries that are comprised of 8 of these 1.2 volt cells and deliver 9.6 volts. As there are a number of non-rechargeable alkaline batteries that deliver around nine and a half volts when fresh, I don’t think there’d be a problem using one of these 9.6 volt rechargeable batteries in your rig. If you’re not comfortable with this, try reaching out to Fender and ask them why it’s not recommended to use a 9 volt rechargeable battery with their preamp.

[@HeyItsAsmus]

I have a stingray and I removed the tone knob so now there is a hole in my control plate. It would be awesome to have a rechargeable option in that hole that I can just run to a battery!

[@bearnerd8399]

@Mad Love Concept , hey bro , What micro USB 9v batrei did you use? Is that not give you feedback sound!??I tried that with ok cell micro USB 9v batrei and that feedbaback nging sound every time I used it, maybe you can give me some guide to solve my problem, thanks

[@ChurchCinematics]

For this project I used the Delipow USB 9V Lithium ion Rechargeable Battery found on Amazon. I do not experience any buzzing noise unless The battery is being charged with the USB Port AND my fingers aren’t touching the strings. Does it only happen with a rechargeable 9V and not a regular? Is the negative pole of the 9V tied into the guitar’s ground? Feel free to shoot me a photo of your guitar’s back cavity at [e-mail]

[@doofs]

i was wondering why people haven't done this mod yet! im gonna try the exact same thing but might try it with battery bank instead.

[@MrBlowncat]

Excellent!!! 🌟🙌🏼

[@ChurchCinematics]

Thank you!

[@victorvalero6637]

Hello, does it add a lot of noise compared to an alkaline 9v?

[@ChurchCinematics]

If used properly, both types shouldn’t add any extra noise. Sometimes, you might experience a digital ground hum when you play while the guitar battery is charging.

[@miniduri]

a nice idea dude.. I have been thinking of that billiant thing.

[@groovewizard1590]

Does the battery work while it's being charged? Like, can I keep the USB cable plugged in while I'm playing?

[@ChurchCinematics]

Yes, but it has a high pitched ring because the digital ground and the analog are separate. A little annoying, but not the end of the world for the 30 minutes it takes to charge

[@BagusWibisono]

Hi.. Can this rechargeable batteries do with EMG pickups?

[@ChurchCinematics]

Yes!

[@BagusWibisono]

@@ChurchCinematics what is that battery brand are you using ?

[@qt_sir]

@@BagusWibisono everything is in the description

[@TheKentBlack]

Brilliant

[@skidogbill]

That’s a great idea! Can you recharge while you play?

[@ChurchCinematics]

Yes, but there might be a grounding issue that makes a slight high pitch noise

[@skidogbill]

@@ChurchCinematics Understood. I should be able to use a portable USB recharging battery pack without noise though, right?

[@ChurchCinematics]

@@skidogbill do you mean the battery inside the guitar cavity? The 9V wont produce any noise unless being charged. But if you plug it in to be charged, it might produce noise. To get technical, it depends on whether the digital and analog grounds separated in the 9V battery and the charging source.

[@skidogbill]

@@ChurchCinematics I have a portable USB battery charger (a 3”x3”x1” box of batteries) for recharging devices without access to 110 power. Anyway, hopefully it wouldn’t add any noise.

[@royboysoyboy]

12/10 intro

This video is great man thanks a lot. I tried to do it recently. However, when I plugged the guitar in, there was this terrible high pitch noise. I switched the usb 9v battery with a regular one and the noise was gone. At first I was thinking it was because the battery is only 600 mAh but it could be because of an issue inside the battery itself. I ordered another one at 1200mAh. Let’s hope it works.

[@ChurchCinematics]

The battery manufacturer’s probably didn’t ground the analog ground and digital ground together. That high pitch noise will happen with devices like XVive U4 when they’re being charged because the grounds are separate.

[@iridios6127]

Loïc NOEL The noise comes from the dc-dc converter built into the battery.

Is it possible to fix it?

[@iridios6127]

@ Yep. Check the grounding. Make tin case for battery, this case need to be ground too.

[@CaptainMyron]

@@iridios6127 I know this is very random but i am trying to troubleshoot this for my guitar. I've tried using tin tape to make a case for the battery but the hight pitch noise is still there, how can i ground it so that the sounds get fixed. Any help is appreciated.

[@GhostOfCaerbanOG]

💪💪💪💪👍👌👊🤘✌️

[@artisanconcrete1212]

Please forgive my 9v rudeness!

[@ChurchCinematics]

🤣🤣🤣