How to Fix a NOCO Boost Jump Starter

In this video, I show how I fixed a NOCO Boost Jump Starter that would no longer accept a charge. I was able to do this without the need for opening the plastic case.
Here are links to the items displayed in this video:
NOCO Boost Jump Starter Pack shown in this video: amzn.to/3u8OCdc
Digital Multimeter: amzn.to/49aG8Bm
USB-C to USB Adapter: amzn.to/47T1zG7
USB Cable with Alligator Clips: amzn.to/3HxsOLF
12-Volt Trickle Battery Charger: amzn.to/48Q7PPW
Disclaimer: The links above are affiliate links. This means that if you click on these links and make a purchase, I will receive a small commission from the vendor. There is no price increase when using this option! These small commissions help to keep my channel running and producing similar videos. Usage of these links is greatly appreciated.

[@michaelobert3346]

I had this exact model. It sat in my truck for 4 months. Brand new! Then it went dead. Would not charge! This trick saved me from throwing out my NoCo. It 100% worked! I left my trickle charger on for 20 minutes and made sure it was selected to lithium battery! THANK you! I ordered the two connectors and jumpers but used my own maintainer. PERFECT!!!

[@davewithadayjob]

Thanks so much for making this video. After having my second Noco Boost jump box die I was about ready to toss it and move on to another brand. Came across your video and was able to save it using your technique. Thanks so much for helping the community!

[@KiloLima]

Thirty minutes well spent. What a clear and concise explanation on how to save a pricy emergency tool. Thank you, sir! Well done.

[@KiloLima]

24 hours later. A couple dollars worth of supplies arrived from Amazon. Followed Jim’s instruction and hooked up the USB-C to the adapter’s negative side to a 12V 750ma maintainer. Positive of the Noco to the positive of the same charger/maintainer. The maintainer quickly showed a correct connection and indicated proper charging was in progress. Let it sit for an hour and viola … a several hundred dollar paperweight was indicating it was being properly charged. Let it sit a little longer and then plugged the Noco GBX155 into a standard USB-C charger and the Noco came back to life and indicated a proper charging cycle was in progress. Letting it sit overnight and continue to charge. What a fantastic and cheap solution. Even cheaper than dealing with in or out of warranty claims. Sir, thank you again for sharing your expertise. I hated the idea of opening it up and possibly frying a component with an improper connection. Your solution hardly took a moment and saved a valuable emergency device. Thank you!

[@jimcash1515]

My dead Genius BoostHD GB70 was headed for the recycling heap. It died last year, and I just never got around to disposing of it. I used a NOCO Genius10 to mimic the trickle charger and it appears that my GB70 is coming back to life! I just don't understand why it crapped out in the first place. Thank you!

[@marcuscaptain534]

Can u explain a little more in depth how u did that..thankx

[@jeremybreeden4228]

​@@marcuscaptain534if you're attempting to revive your Nocco gb70, you will need to either buy a USB cord with alligator clips already installed or make your own with an old USB phone charger by cutting one end off the cord and stripping the black and red wire and place some alligator clips on the wires you stripped, once you have your USB cord ready plug it into the USB port in the Nocco device, now you will need a car battery charger of your choice that is capable of trickle charging, now connect the positive of the trickle charger of the trickle charger to the positive of the Nocco gb70 and then connect he negative of the trickle charger to the negative wire on the USB side of the Nocco and now you can start your trickle charge and monitor the charging process with a multimeter and once you get a few volts reading using tjr trickle charger you can remove it and begin to charge it using the standard method. Goodluck!!

[@Critter15]

Wanted to thank you! I was about to give up on my G40, but your instructions fixed the problem. Genius!

[@jimginnyohio]

Nice! I’m glad that helped. You’re very welcome! Take care.

[@devileo]

I revived my GBX75 by this method. Thanks a lot for this detail guide. I don't have a 12V charger. I just hook it up to a 12V battery and charge it for 15 mins.

[@jimginnyohio]

@@devileo Glad that worked out!

[@haydencreek]

I just followed this with my GBX55. It was completely dead and now it's 100% charged. thank you!

[@jimginnyohio]

Glad to hear it helped. Best wishes!

[@liamgross7217]

@@jimginnyohiosuccess with mine as well. many thanks from 🇦🇺

[@reytorres6767]

This revived my GBX75 after 2 years!

[@jimginnyohio]

Nice! I'm glad that worked for you. Cheers!

[@hellcatsr4bosses934]

Thank you very much for your contribution to our Society thank you.

[@newsigmundfreud3023]

*GENIUS. Thank you!*

[@timothymurray9684]

Awesome video..Great info!! Thank You!!

[@user-tr4wn6uq4o]

Excelente video, gracias, funciono a la perfección, la falla era 4 veces la luz de advertencia y no cargaba.

[@patmoon3183]

The BMS gets power from the power supply as well. Most of the time the battery voltage drops below the minimum voltage allowed for it to charge the battery.

[@mwolfe83]

Great video. Thank you sir.

[@AveRage_Joe]

Great Job!! I think I would have ripped it open lol Hey what house shoes were you wearing?

[@jimginnyohio]

Thanks man! Ripping it open was my initial thought too. But since it wasn’t mine and I saw how much those things cost, I thought I better try something less invasive first…and it worked! My house shoes are Sketchers. Pretty comfortable since they have memory foam with arch support too. I got them at JCP, but Amazon has them too. Here’s a link so you can have a better picture of them: amzn.to/3HSCtMF Take care buddy!

[@reytorres6767]

Thank you so much!

[@terrym1964]

I have the Noco 1 trickle charger. I'm guessing it will require more than 15 - 20 mins for that initial boost with it being only 1 amp ?

[@OBrienTruckers1934]

So I have a question to ask. Unless I missed the answer, if you are successful using your fix, how do you keep from having the issue happen again? Is it making sure you keep the jump started charged?

[@jimginnyohio]

@@OBrienTruckers1934 Yes, that is the key. If it’s not used for a long period of time, it’s still important to maintain it over time by plugging it in for a quick top-up charge cycle.

[@offgridwanabe]

Success where there's a will there's a way lol BMS are tricky things, most of use would have baled into the screws right away lol

[@jimginnyohio]

Yep, That was my initial thought too. But since it wasn’t mine and those things are so expensive, I figured I would try other options first. I guess even a blind squirrel can find a nut now and then, huh? ;-)

[@EdwardAJeffries]

Great video and explanation. Thank you !

[@a64738]

I had mine for 5+ years , it charges but have in 20 - 30 start attempts never started ANYTHING at all... It just runs the lights and make the click click click sound. And the hold button 3 seconds to pass the safety do nothing.

[@damian4483]

Can I connect the trickle charger directly to the clamps on the Noco box, or do I have to put the negative clamps into the actually charger like you have

[@jimginnyohio]

@@damian4483 You will need to do it like I did otherwise the battery will not charge.

[@damian4483]

@@jimginnyohio ok so black terminal needs to go into the “in/out” of the battery and the red terminal goes straight onto the battery box red terminal itself

[@marlowstansfield9281]

This video is superb I understood everything that was explained I'm now going to put it unto practice thanks I'll let you know how it goes

[@marlowstansfield9281]

I am extremely grateful my charger is now fixed and working like new thank you so much for you video really helped alot 😀

[@jimginnyohio]

@@marlowstansfield9281 I’m glad that helped out!

[@ferniefuentes3690]

Just curious and hope you see this Jim. Is there any long term impact to the batteries in the charger by letting the batteries "die" and then using this process to revive them? I have a different portable unit, Winplus car starter/USB power pack, that is possibly having the same issue. I'm a bit concerned that the lithium batteries may be permanently affected but the total discharge and then reviving them.

[@jimginnyohio]

Lithium batteries normally don't have a memory like the old nicad/nickel batteries. I've had some lithium (18650) batteries sit dead for several years and I was still able to revive them for use again. It's best to recharge them as slowly as possible though. Also, they may require several full charge/discharge cycles before they are fully revived to a fully functional state. Good luck with the Winplus unit!

[@ferniefuentes3690]

@@jimginnyohio Thanks Jim. I ask this question because I used to fly RC planes, maybe I'll get back into it, so I'm very cautious about LiPo batteries. When they swell, BTW, laptop LiPo's swell too, then it's time to replace the batteries. I didn't want to invest in getting this device operational only to have it blow up in my car. Really appreciate the work you are doing to revive batteries. One would think that the manufacturers would build a bypass into the device to resurrect it from deep discharge but nooooooo, that would cost a few pennies too much...

[@jimginnyohio]

@@ferniefuentes3690 Yes, I’m familiar with the LiPos since I too used to fly planes. There is a big difference in Lithium Polymer versus Lithium Ion batteries. While the Ion batteries can indeed catch fire, they are far safer than the LiPos that we used to place into a fire safe bag when charging. If a LiPo pouch cell swells too much, it will usually vent and catch fire. However, with the Lithium Ion cells, they will usually just vent unless they are violently damaged. I stressed in the video to only bring the batteries up to a working voltage and then switch back to charging thru the BMS. That is an important step to remain protected and minimize risks to the batteries, device, and yourself.

[@emilg]

What if I don't get any kind of lights when pressing any button? I also don't see any lights when I plug in the USBC charger. It seems completely dead. Should I still try this trick?

[@jimginnyohio]

I would still give it a try since no lights at all might simply mean the battery is completely dead.

[@RobinDewitz]

I have GBX 155 also that is completely dead even though it has been plugged in the whole time ive had it. i tried today to charge it using the cigarette lighter that comes with it, thinking I might have a bad cord . Nothing yet. iIs it possible I fried the board by having it plugged in all the time?

[@jimginnyohio]

@@RobinDewitz It’s really not a good idea to leave it plugged in all the time. You can try getting a new cord. Maybe that will help. Try depleting the batteries completely and try again..

[@ZacharyMorris-ms7zi]

I followed your steps to check the battery voltage bypassing the BMS and I’m showing 13.2 Volts on the battery but the box will not charge and does a slow blink on the charging error led. Any idea as to what it might be preventing the unit from charging?

[@jimginnyohio]

@@ZacharyMorris-ms7zi It’s possible you have a bad cell, or unbalanced cells. I would try totally draining the batteries and try again.

[@costiciuca9506]

Hello. I have a GB70 and I did your method but I have charged it for 3 days and it has barely reached 10v... why is it charging so hard? at first I was charging it with 12v now I use another 16v. from 2.4v to 10v in 3 days seems a lot to me. thank you

[@jimginnyohio]

It's possible you have a damaged or bad cell in there. In that case, this charging method won't work. Sorry! You can try completely draining the battery pack and attempt again a couple times. Sometimes that will help get things working again.

[@costiciuca9506]

⁠@@jimginnyohiohow I drain the battery?

[@jimginnyohio]

@@costiciuca9506 Connect everything as I explain how to charge, but then use the positive and negative leads to connect to some sort of load instead until the battery is completely drained. then try charging again.

[@darylw792]

I have a question about the SUN 1000w grid tie in inverter with limiter. Can one set these inverters up with solar and battery at the same time?

[@jimginnyohio]

Yes, there are several folks that have posted videos for how they did that. Search KZbin for Paul Kennett and also Old Time Engineer. I believe they have both posted some videos covering that.

[@darylw792]

@@jimginnyohio Thank you

[@HelikopterJacob]

I have my gb150 open can plug in directy to the battety terminals?

[@jimginnyohio]

@@HelikopterJacob Yes, you can. But only charge the battery up to about 10 volts and then return things to normal so the BMS can continue to protect things. Good luck!

[@HelikopterJacob]

@@jimginnyohio thank you will try that

[@Matlauk]

Sorry to get on your case but did you say "one volt of current"? lol

[@leedempster4743]

Mine is just dead not turning on not charging .

[@jimginnyohio]

@@leedempster4743 Yes. If the battery gets too low, it will not turn on at all. Try my fix and you should be able to restore it.Good luck!

[@My65isblack]

Thanks for the video. Now why is the reason the charger end up dead and not able re charge it normally