BESTEK 600A Portable Jump Starter and Power Source Review - Part 2

Doh! I forgot to release this video!
Thanks for reminding me Denis Weber!
(yes, I'm still alive. Thanks everyone for your support!)

[@knurlgnar24]

Hello everyone! At this point this video is only a one-off and I do not plan on returning to youTube full time - perhaps part time. This was an old video that I 'forgot' to publish at the time and while I would like to start making videos again (and I have a large number of video ideas in queue) there are practical reasons why this is unlikely to happen in the near future. Thank you everyone for your support and I appreciate your understanding in this matter. I have recorded a number of videos in the past year or so in an attempt to start again but have been disappointed in their quality and haven't uploaded them. I seem to have lost the mojo I once had when this was a hobby/passion and I don't want to just upload crap for the sake of uploading something.

[@garbleduser]

I'm just glad to see any of your work. I've never seen anyone put out a video series on inverter upgrades. Maybe this is something you could tackle that would be fun.

[@jamienoel]

Your followers would still like anything you upload regardless of your criticism. We're our own worst critics, usually! Please come back regularly, or as time allows.

[@xxxratixxx]

Thanks to one of you videos i upgraded my ups apc stil running awesome

[@JamesLewis]

Well, I thing we're all happy to know that you're still around... even if you're not being a youtuber. It's easy to wonder what happened when people just disappear! :)

[@killerkam8564]

It's okay I been watching your videos for awhile they are awesome keep this up I been watching your videos since 2017 and yeah I watched them and I like them they are awesome when it comes to batterys and power inverter I have an everstart power inverter can you do a video of an everstart power inverter review and testing I want to know if it's pure sign wave or mosfiy sign wave

[@harrisonernst2990]

Knurlgnar, as an electrical engineering student, I am profoundly happy to see you are uploading again! Keep up the amazing work!

[@knurlgnar24]

Thanks! Some advice if you are interested.. As an engineering student you'll find in your career that there are, in general, two types of engineers: The type who follow 'the book' and try to CYA by following standards even when they make no sense leading to erroneous conclusions, and those who think for themselves to solve problems and work to understand that which they are working on on a deeper level. The prior group will generally get ahead and move up the ladder, the latter group may or may not and only the most dedicated have much of a chance of making it but those who do are the ones who truly create, innovate, and make a difference. I understand why people make the choice either way as one has to do what they feel is best for themselves.

[@benmudn]

Good to see you back! I've checked a few times to make sure I was still subscribed.

[@volvo09]

Missed your stuff man, keep well.

[@IncreasingVoltage]

You don't know me and I don't know you. Really glad you're still with us. But man, I was really worried about you. Hope you're doing fine. I was regularily checking your YT account.

[@Shew0000]

Well said 😀

[@blabbersoft]

Welcome back!

[@DennisWintjes2]

Welcome back!!!!! Missed you. Like #6

[@jmeady]

It's just like Christmas! I want to welcome you back. Thanks for what you have done and I know we all hope to see more. Cheers !

[@Lee_Adamson_OCF]

A Wild Knurlgnar has appeared! Roll initiative!

[@haunter51662]

Hi Knurlgnar, I was happy to see you posted. Like many here, we all miss your posts. Hope all is well and come back real soon!

[@kf7tkj]

I haven't even finished watching this...so happy to see something from you, glad you are still around. I know some of us were worried about you!

[@LChow-xq3xm]

Same here... glad you're back.. we all missed you... 😇

[@crash3ksa]

we've been waiting for YEARS !

[@acklan3]

Great you are back. Really missed your content. 😎👍👍

[@liamdrew7548]

woooooo, you're back :)

[@forthrightnight]

What a nice surprise!! Still a subscriber after all these years. Checked in once in a while and watched an old video or two for old times sake. Then, BAM!! what is that in my suggested videos? I couldn't believe it. Take care, and I hope to see a video once in a while. I completely understand about the mojo.

[@proyectosledar]

You are ok. Welcome back.

[@lagman8908]

I hope you are back for good ! Love your videos and really missed them.

[@uxwbill]

I nearly fell over from astonishment when I saw this video appear. I'm glad you came back, even if only on a limited basis. It's good to know that you're still around. I can totally understand getting burned out with KZbin. It's not what it once was. Still looking for one of those Craftsman scope meters, just for curiosity's sake. (I did find a much earlier version of one.)

[@knurlgnar24]

Thanks for your comment and support! Yeah, those Craftsman scope meters were ahead of their time - 20 years ago - but now they are more of a curiosity. 10 years ago one used to be able to find them on eBay fairly regularly. Not so much anymore.

[@garbleduser]

Oh my God! You're back :-) thank you so much for gracing us with your presence!

[@Antno]

Yay your back

[@chadhauze1683]

So glad to see you’re doing ok. Your videos were the first I discovered and subscribed to on KZbin. I can always count on them to be both educational and entertaining. I look forward to whatever you choose to share in the future. Be well!!!

[@gbear14275]

So glad to see you return!!!

[@jrveloso]

Happy to see you again. Don't worry too much about the quality of the videos, i am sure they will be great. You have been missed.

[@yaahme]

I purchased several of these for me and for my adult progeny. Glad to know these little power houses are quite capable to jump the car battery and are built with quality parts. I keep a 60 Watt solar panel with a 200 Watt approx. solar power generator with the matching cables to jump the jumper Bestek :) & or various other things like the cell phone, lighting hook-ups and the tire pump in the vehicle for just in case. There are now more powerful units available, as I am sure you know, but this unit ought to last 10 years or so as adequate back-up until it may need replacing for those wondering.

[@knurlgnar24]

I'd be surprised if a device like this truly lasted 10 years in a realistic use environment, but as gimmicky as they look they actually do work! Best to test them every couple of years to make sure they still work as expected.

[@simpletennesseelife5895]

Wow he's back great I missed you!!!!!

[@gregorscott]

Good to see you back, I just looked up one of your old videos last week!

[@rpbajb]

I found this new video while searching for one of your old ones for research purposes. Yes, you're one of my teachers for this subject. Nice to see you back, if temporarily.

[@iainmcmillan1048]

Great To See You Back! Look Forward to more Uploads even if it is part time!

[@mqe73M]

Hooray new video

[@202seabass]

Made my day to see you post, seriously

[@ChrisEdwardsRestoration]

OMG im so happy your back, we all thought you died! ? where you been ?!?!?!?!?! dont worry about the writers block, 60,000 subscribers do not come easy! you sir are awesome!

[@ap6553]

Great to see your back! Love your videos.

[@peterzeboroff7448]

I am very happy to see that you are still around and doing videos. I have watched every episode you have posted and really enjoy your inverter and power supply repair videos. I hope you will be doing more of them.

[@FDM33510]

Glad to see you are still alive and kicking! Your videos inspired me to do some pretty involved projects. Thx for all that you have done, and hoping to see you do some more in the future!

[@knurlgnar24]

Thanks for the comment! I am happy to know that my videos have had a positive impact on someone's life. Comments on youTube are so often the result of the worst in people and it gets draining to read them. Feedback like this means more than you might think to individual youTuber's like myself.

[@tinysolarshack9615]

Whew glad to know you are still out there. I was SHOCKED when I saw this pop up. I won’t recant what many have said. Please don’t judge yourself to hard. What may seem mediocre to you can be life changing for us. Having Asperger’s syndrome you seem to explain things in a way my brain can wrap around! I will always be glad to see what you release. Peace and tranquillity my friend.

[@knurlgnar24]

Never diagnosed and perhaps do not have, but I can fully identify with Asperger's and how it affects a person. People are generally astonished that I have/had a youTube channel as I love quiet, peace, and isolation. Thanks for the comment and take care.

[@why_do_you_want_to_know]

Glad to have you back .. missed your frank, straightforward style of explaining things .. we need more engineer type KZbinrs like you to "entertainucate"!

[@Rod_Knee]

Glad to see you're still around, Knurlgnar. You content is excellent - both educational and entertaining, a combination few achieve.

[@knurlgnar24]

Thank you for the comment and support. People expect high quality content and video anymore that takes a lot of time and expense to produce, and I've found it difficult to achieve that level with the limited resources I have on hand. I do intend to produce an infrequent stream of videos in the near future though I cannot claim the quality will be as high as I would like. KZbin isn't what it used to be and professional content creators have captured most of the market. I don't claim to be, or want to be, a professional youTuber.

[@Rod_Knee]

@@knurlgnar24 I understand completely. Making quality videos takes a boatload of work (I have tried in the past... for me the juice was not worth the squeeze). Regardless, I look forward to whatever videos you do put out in the future.

[@shawn7913]

Holy cow, you are still alive! I really enjoyed your videos, hopefully you will start making more.

[@creativelife4453]

i'm happy that you shared this video. hope you never stop again .it was long time 4 years , i'm still waiting for more videos you will share

[@GoingOffGrid101]

Hey buddy!!!! missed you so much!!!!!!! you need to come back to us and make videos! I tried to do a few repair videos but im not as good as you!

[@kevinedward1234]

Great to see you back!!!!!!!!!!

[@celsosalvador8280]

You back!!! Best wishes!

[@BlackAck90]

Agreed...miss your videos. Thanks for your time

[@nomadeenvr2233]

Happy to see your video again! Be safe and thank you so much.

[@fiveangle]

Whew ! ‘Been waiting for the teardown part of the review. I think I can now buy in confidence ! 🤣

[@SierraOne]

Almost gave up on ya! Nice vid

[@somethingsomeone5440]

Glad to see you're back. Had been worried something happened to you. Like maybe a project gone wrong or something.

[@JohnSmith-qd8po]

Welcome back Knurlman. You and Big Clive should get together with some libations.

[@knurlgnar24]

I often wish I found Big Clive's niche! That's a good channel.

[@volvo09]

You have a similar niche, just talking the way you do, educating or passing tips where you can, and that "go take your complaining elsewhere" style. Updates on your projects would be cool, but I know setting aside time to "do youtube" isn't always easy, or even something you feel like doing even once in a while when daily life is enough mind entertainment.

[@ScotWalt858]

Nice to see you back at it! :)

[@mikeriverajr4447]

wow man, so happy to see you back, I love your videos, and like others was concerned if you were okay, keep up the amazing vids, have been a long time subscriber and some how youtube unsubscribed me

[@jamest.5001]

I'm so glad you are at it again, some what.

[@MrDunk66]

Missed your videos.

[@lexuslx450]

I cant believe it! we have a virtual funeral at the college last year in memory of Knurlgnar .. People you have no Ideal .. this guy is a legend .. !!

[@derekmarshall2169]

Glad to see you back! I always enjoyed your videos especially on inverters. Heres hoping you come back to youtube regularly and maybe once you get going the mojo will return!

[@michaelh465]

Glad to see you back! But I'm going crazy trying to find part 1.

[@GarmnCX]

Welcome back

[@lorenrickey5481]

Welcome back my friend, you've been missed!! I purchased a DeWalt lighter socket inverter from Home Depot a week ago for under $30 and I'm really impressed with it. Maybe you can do a review on it? Can't wait to see your next video.

[@midashaltzern]

OMG you're alive!

[@MrRossman104]

Man it't good to see something from you. Hope you are well and the creative bug bites you again!!

[@ranger175a2w]

Hello there, great to find you again on KZbin. I like some others would be honored for your return to making content. That 12v generator you made prompted me to gather things I've found on the curbside to make one of my own. (much to my wife's dismay) until it saves our bacon, like other "junk" I've got hanging around in my shed has inthe past.

[@knurlgnar24]

ha! 'much to my wife's dismay'. Yup. Sounds familiar... Glad I have her though!

[@dhg1839]

nice to see you back

[@jockosboy17]

Wasn’t expecting to see a video from you in my feed.

[@robertpitt8418]

O MY GOODNESS ME, YOUR ALIVE AND WELL IT'S A fuxking MIRACLE ; )

[@jackpatteeuw9244]

Welcome back ! I am dying for a GOOD review of one of the WZRELB inverters.

[@knurlgnar24]

That's actually one of the inverters I'd like to test at some point! I also haven't seen a 'good' review in my opinion. From what I've seen I have low expectations though..

[@jackpatteeuw9244]

@@knurlgnar24 A couple of videos for you to watch and hopefully get you "motivated" ! This appears to be a "high frequency" inverter (incoming DC is "chopped" at a high frequency and sent to transformer(s) to boost it to at least √2 x the output RMS voltage. It is then converted back to DC (Schottky bridge) and this voltage powers the MOSFETs. kzbin.info/www/bejne/gJKrXodjZapjo7s kzbin.info/www/bejne/gWLEhqajj7eMiLM If you look closely at the control board in the second video, you will see that it looks a lot like the EGS002 board. EG8010, and a couple of IR2110 clones.

[@ElGatoLoco698]

Ha, four years is better than five. I hope you got some new stuff to post. Missed your videos man.

[@pauln3566]

Missed you man!

[@healeydave]

Wow, I can't believe it, I actually did a search, "what happened to knurlgnar24", hoping not to find out your disappearance was some sort of fatal accident :) It appeared some sort of internet mystery, a guy with nearly 19M views just suddenly stopped uploading, I feared the worst. Thankfully, you've explained in the comments below and hey, you gotta do what's right for you first. Your content speaks for itself and I'm sure there's plenty of people out there that are thankful for all the contribution you have given us and may give us (albeit in whatever limited fashion) in the future! Stay healthy man and thanks for this newish edition :)

[@knurlgnar24]

Thanks. I appreciate comments like this very much. I don't always take the best care of myself but I do appreciate knowing that my content has in some way improved the lives of others. Take care.

[@Ge-Fat]

welcome back!

[@JuliansRandomProject]

I upload piss poor quality videos all the time! folks don't seem to mind. We'd love to see you return to KZbin. And I totally get the loss of mojo, it's happened to me a number of times. It can also be frustrating with time commitments and potential conflicts of interest. Glad to see you're not dead, hope you get back at it.

[@OffGridAussiePrepper]

piss poor???? u jest sir... u need a slapping.

[@DesmondNoel]

Hey it's been few years welcome back

[@DevinRostron]

You're back!!!!!! Yes!!!

[@chrishammond5001]

We missed you!!!

[@technologicalsingularity1788]

Welcome!!!

[@donnots8218]

One of the first people I ever subscribed to

[@knurlgnar24]

I am so very sorry... But thank you!

[@polishhotdog933]

WOW, where have you been?

[@ghengiscrayon]

Woah! A Knurl vid. Cool. All the Xantrex dudes are watching.

[@frugalprepper]

Well Crap. I lost that bet, you are still alive! I am glad I lost! Long time no see. We've missed you.

[@knurlgnar24]

No prob, I bet on the opposite side. No hard feelings I hope?

[@Migueldeservantes]

I'm really glad you are not dead, I did follow you till you stop uploading videos, One wonder May be he get married.. and now have a hole bunch of little electrical engineers running around making short circuits and tripping up the breakers around the house!! having the good life!! what ever is what you want to do.. more videos... no more videos.... best of luck.... "I really wish you'll keep up it" there is people like me that wish to have some one like you to make their own "Large transformer type inverter"... well hope to hear from you soon!!

[@paherbst524]

You're back!!!!

[@richardwasserman]

Glad you're not dead.

[@MrClipper500]

Great video. Now I know enough to stay with the sealed acid battery jump starters. The lithium jump starters probably work well but I don`t need to see flames coming out of my truck`s glove box after it bakes in the hot sun. You haven't done many reviews on the current generation pure sine inverters. I was wondering how they actually shape a pure sine wave compared to a modified wave inverter. I have a go power 300 watt Pure Sine inverter and it really does not run my drill any better than my modified sine wave inverter. Makes me wonder if it really is a pure sine inverter. A good topic would be parasitic draw caused by automotive computers and how long will a vehicle battery last when not driven. I recently learned the hard way that anything you plug into the diagnostic link, example a driving computer greatly increases parasitic draw. Great to see you back.

[@garbleduser]

I'm reminded of the ending of the "great Hiatus" that homestarrunner.com went on for way too long.

[@mlc4050]

Rumor became KZbin legend that you had perished in a horrific laboratory explosion caused by the fumes of your newly converted non-CARB compliant gas can. Everyone was thinking "those hippie sons of bitches at CARB were right all along!"

[@carmadme]

Good to see another upload from you do you intend to keep going or is this just a one off

[@gtredsker4289]

Oh my, he's back really?? 🤗🤗

[@iamamo2min595]

Still great video

[@vloy3502]

Would be interesting to get feedback from you on how well your battery bank held up over time , and how your inverters held up also and a comparison to what is on the market today.

[@knurlgnar24]

I haven't done much with the battery bank or my inverters in the past 6 years or so to be honest, and I ended up having to recondition my Powersafe SBS battery bank again this year to get it back into shape. (BTW, after reconditioning it now performs better than after the 1st time I did it, so I guess you could say it held up well) Inverter performance/quality has clearly taken a nosedive though and it is difficult to find anything good at a reasonable price anymore. If you can find one of those old Cotek/Samlex inverters, get it. I do have one of the new Cotek 4kw inverters that they replaced the old ones with and while it's a good inverter the old 3kw unit outperforms the new 4kw one. I now have a Magnum PAE and some SMA 6048's that I've yet to put through their paces as they are known good products. Not exactly low cost though and I don't have a lot of recommendations for a $300 style inverter.

[@acet7]

It sort of looks like a Pmag, cool

[@RiceCakeWtf]

Holy shit you're still alive, lol.

[@davidw2425]

are you back at making videos? so great i love the inverter repair videos

[@knurlgnar24]

Thanks for the comment and support David! At this point I don't know if I'll be making videos again or not. I do have a good number of ideas and items/inverters/chargers/batteries/equipment sitting around that makes me think 'Hey, this would make a good video!'. I've also acquired a good number of inverters in the past years. As far as inverter repair videos specifically it has become very difficult to find good repairable inverters for sale online anymore. It seems others have discovered that there can be money in repairing these units so any positive revenue would depend solely on views as I'd make next to nothing on the repair itself. That rock has been squeezed to the point of blood coming out of it..

[@ditsmiddle4663]

Where have you been ??!! Thaught you was Dead ?? Glad your o k 👍

[@zackkast]

four years later

[@xxxratixxx]

Omg i vant bolive it i hope you came back to stay

[@gd2329j]

Welcome back . Don't go silly posting videos one or two good sensible videos a year is ok . If you think its interesting please do post it . You do a better job than most on youtube . We trust your judgment ! 70% of videos on youtube you'll smell fertilizer in the first minute ! It then gets copied by the ID 10 T lot thinking that's how it's done .

[@michaelmorris1802]

I'm sure there are 156 comments below this one saying how happy we are to see this... I would agree complete junk is of little use... but I'm seriously doubting anything you would record would be so. I don't upload video's for this very reason... not going to spend hours of my life editing something, and I hope you don't either. Life is WAY to short. The trick is to think about it carefully before hand and then just do it in one take and we get what we get... or so I hear others saying. :)

[@knurlgnar24]

Nothing I do would be worth watching in a single take unless you want to see how to screw up something in real-time. :) If I ever finish it the next video will be recovering a completely dead UPS battery using lab style equipment. Yup, another video where I blab about stuff while the camera looks at a battery for 15 minutes... This is in comparison to my other video where I use a crude garage-tool method. Thanks for your support and comment.

[@davelee7572]

i have wondered where the F you went. any content is better then nothing for 4 years. your older video helped with so many projects one way or another. dont be a stranger... your subs may be able to help with that mojo!

[@grecko2125]

Unfortunately you are wrong, it's a buck-boost converter, it's not just buck, and there is no other SMPS behind the circuit. But great video

[@knurlgnar24]

Been quite a while since I've made this video so I don't recall the details and I may have made a mistake. Buck/Boost is normally avoided unless absolutely necessary for practical reasons so it isn't the 1st thing I would have assumed. In most applications you're better off with two separate converters.

[@chrissteene]

amazon for the screw driver kit 25$ own one and it's great look for the (boxter) screw driver kit

[@blackz06]

Maybe I missed it, but what cells are in this?