How do you know if a battery is good quality?

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Find this battery on Amazon at: amzn.to/2Xcgvja
Learn how to make your own battery with my book DIY Lithium Batteries: amzn.to/2jbxvzS or check out my second book - The Ultimate DIY Ebike Guide: amzn.to/2BGx4Fn
The gear I use for my videos:
Camera - Nikon D5300: amzn.to/2DcuVlM
Lens - Tamron 18mm - 270mm: amzn.to/2qLZlsG
Thermal camera for iPhone/Android: amzn.to/2FikWvW
Drone for "follow me" filming: amzn.to/2UFOds5
Camera for invisible selfie stick shots: amzn.to/2Vb9D0r
Here are some of the products I use:
Bafang BBS01 kit: goo.gl/VxhTHu
Bafang BBS02 kit: goo.gl/9cfWfk
Bafang BBSHD kit: goo.gl/dWX2pm
250W complete e-bike kit: goo.gl/7HSQye
500W complete e-bike kit: goo.gl/xWPgtj
1,000W complete e-bike kit: goo.gl/UdUWK9
36V 13Ah Hailong (shark) battery: goo.gl/K9PsuC
48V 15 Ah triangle battery: goo.gl/6zjneY
52V 17.5 Ah triangle battery: goo.gl/e1E8ug
All ebike batteries: goo.gl/7pAi9Z
All 18650 cells: goo.gl/hYWnwU
Xiaomi QiCycle: goo.gl/Ys6JTZ
500 Wh folding e-bike: goo.gl/UWgoJU
Weird suspension folding e-bike: goo.gl/T9xBqN
Segway ES2 scooter (AliExpress): goo.gl/32szNF
Segway ES2 scooter (Gearbest): goo.gl/25URD9
Xiaomi M365 scooter: goo.gl/iEQWJw
100W Flexible solar panel: goo.gl/jK1CSB
100W Folding solar panel: goo.gl/WnHmgY
Cycle Analyst: goo.gl/RsmE3N
The parts that I use for building batteries:
18650 cells: goo.gl/aEabAQ
18650 positive insulating washer: goo.gl/HBVOuc
Nickel strip: goo.gl/VIrNQq
Spot welder: goo.gl/KN3Uaw
BMSs: goo.gl/S6gSQx
Silicone wire: goo.gl/xmpbKD
Black 18650 cell spacers: goo.gl/hQxWF6
Vruzend cell spacers: goo.gl/5ReLqA
Large heat shrink tubing: goo.gl/6v1ow9
Small heat shrink tubing: goo.gl/OU3Z6u
Foam sheet for protecting battery: goo.gl/5e71tE
Kapton tape: goo.gl/D6BT57
Chargers: goo.gl/js0T0V
**Question response book giveaway rules**
When you guys asks questions in the comments of my videos, I'll try to answer them. If there are questions that I think would make a good video response, I'll choose them to do a longer segment. If I choose your question for a video response, you'll win a copy of my book The Ultimate DIY Ebike Guide (the paperback or the ebook), or my book DIY Lithium Batteries.
Here are some things that RU-vid makes me say: This contest is not sponsored by RU-vid and RU-vid isn't affiliated with it. I'm supposed to provide a link to the community guidelines for RU-vid (ru-vid.comcommunity_gu.... RU-vid is not a sponsor of this "contest" and by participating, you are releasing RU-vid from any potential liability, whatever that might be. Privacy notice: I won't steal your info. If you do win, you can choose to send me your address so I can mail you a paperback copy of the book (or some other prize if that changes) or you can send me an email address and I'll send you a copy of the ebook. I will do everything in my power to immediately forget your personal information afterwards.
Outro Music: BenSounds

Опубликовано:

24 июн 2019

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Комментарии : 680

@EbikeSchool 5 лет назад

Man, this video was well over 25 minutes in the first cut. Even after hacking it down it's still a beast. I hope you guys don't mind the long ones!

@unchained20000000 5 лет назад

What is the highest watt motor and battery that I can buy and still be a moped in Pennsylvania.

@rrrimve 5 лет назад

There's some good videos over an hour and no worries at all. It takes time to explain everything shortly. 👍

@cal82252 5 лет назад

It's OK by me! sometimes I watch them twice and take notes. Great info!

@LChow-xq3xm 5 лет назад

Not at all... great video!!! Thanks

@Lea-ww9hf 5 лет назад

It has the necessary time to know how to inspect a battery! Can you show us the other methods to know if the nickel strip have steel?

@Zebrajellyfishphoto 4 года назад

I make up the story you have no problem being factual rather than coerced. It's easy to fall victim to a false sense of self (ego) but I bet you would do a fantastic job reviewing the various products and bikes offered you. You also carry a sense of kindness and that would benefit viewers seeking reliable and solid products. Thank you.

@VCITCloudDesktop 5 лет назад

You're absolutely right with your initial comments, it's great content like this that's building you trust and a loyal following. FWIW, I recently purchased a Vruzend kit and a bunch of other items from your online store because of your contribution to the ebike community and your dedication to quality content. My first ebike build went very smoothly, thanks to all the info I learned from your videos and your book. Thanks!

@stephannilsson7809 5 лет назад

I have no problems with longer movies when they are well made, as this one is. Well done Micah

@sansagii 5 лет назад

Awesome . you showed us the simple ways of checking the battery quality check . thanks for this video.

@graycatgrayhat3404 5 лет назад

Knowing that all the content on this channel is top notch and honest is what we like. I think several people would be willing to support the channel with donations as you provide great info to the ebike community.

@davidfastje8469 5 лет назад

As someone who just built an ebike, I really appreciate good unbias reviews like this! Also, I strongly support having well-made ads in youtube videos! The only reason that people generally hate ads is that they are frequently done poorly (just keep each ad original and there is no issue ... meaning please don't just re-use them)

@michaelarnold3105 4 года назад

I would have taken the weight of the cell into account if I found that they used nickle coated Steele. 18650 should be 18 mm x65 mm and have a weight of between 41 and 45 grams obviously the heavier the cell the more the capacity. also if you had pealed a cell cap you could have checked for a protection circuit and venting in the top of the battery. This is another strong indicator as to the quality of the battery and lastly hook the battery up and check its discharge rate. Thank you so much for all your hard work. I have learned so much by watching your videos. You have brought so much useful information and done so much for us guys that hack around at home. Have a great day and please keep making lots of videos. As far as the length of the video goes the longer the more information.

@LexYeen 5 лет назад

Content like this is why I subbed ages ago, and why I bought your books on battery building and ebikes. Practical information delivered in a concise, easy-to-digest format.

@czarzenana5125 5 лет назад

The electrical resistance of Nickel is about 70% of that of Iron, so the difference isn't very big. There are plenty of cross sections between cells in series, so it wouldn't be a problem at all. You could have actually measured the width and the thickness of the strips and do some calculations instead of using words like 'I guess' and 'probably'. The point that worries me is the (dual layer) strips of the first and last row. Furthermore, you didn't measure the capacity of the cells. You went for the datasheet. If there is one thing you cannot trust it's the specs of Chinese cells. They are sold to up to 9999 mAh which is nearly 3 times of what is even possible at the moment. Most of them perform way below their (fake) specs.

@kevincai96 4 года назад

Those are really only the UltraFire cells. If you get branded cells that weigh the right amount, you can be confident they have decent capacity. Internal resistance on the other hand...

@4nlimited3dition_4n3d 3 года назад

@@kevincai96 Most of them are also recycled and rewrapped.

@thecam0073 4 года назад

You're correct. I come here for great technical knowledge just like you provided in this video. The nickel test, the explanation of the terminal thickness on the power wires... I will use that for sure. Micah is my only ebike subscription on youtube (i'm a 2wd m365 builder)

@reframeyourbody 5 лет назад

Amazing video! Great to see you reviewing this with great care and honesty... Would love to see a little experiment if you fancy that: what happens with your thermal camera when you pull 30 amps from this battery; how much better does it get if you replace the discharge bits of nickel plated steel with pure nickel...

@tomcull5053 4 месяца назад

Great video. I’m a NZ physics teacher and am happy to share your video because it is accurate, paced well and with great visual reference. Top marks, and many thanks, nga mihi nui!

@johngarriss 4 года назад

Thanks for taking care with clear and intelligent explanations. I appreciate your attention to detail and you clearly value good quality design. I look forward to learning more from your videos and articles. Thanks again!

@mitchellbarnow1709 4 года назад

This video was definitely not too long, because there was a lot of information to learn. Thank you so much, Micah

@handyhippie6548 5 лет назад

this is why i subbed this channel. useful information, unbiased opinions, hands on examples of how to understand what, and why. you never fail to deliver on the goods.

@billprocter942 5 лет назад

I appreciate the detailed and honest review. I was actually looking at this battery on Amazon.

@daniele_go 5 лет назад

Hi Micah, as usual excellent and very informative video, thanks! The only thing I miss is that the cells are SUPPOSED to be 2500mAh from the technical sheet but this should be checked to really know if this is a good quality battery. It would have been nice if you had been able to charge/discharge 1 cell and see if we are close to theoretical specs (or not...)

@KS-2 5 лет назад

Very good video. I do not mind longer videos with great content. Thank you for making this video. I’ve been contemplating on converting my existing bike to electric, and your videos have been a great help.

@RPRosen-ki2fk 5 лет назад

Good job explaining without talking over my head. I'm still gonna need to rewatch parts though.

@kyleniedermeier6651 5 лет назад

I love seeing this kind of breakdown and review!

@lawrencenelson7955 2 года назад

Thanks for doing the breakdown on the battery, I learned a lot! I had wondered how there could be such great differences in battery costs from different vendors and manufacturers.

@catalyst2o 3 года назад

I really appreciate your honest and comprehensive reviews, not like some others who only look at the most obvious your nickel test , awesome and simple.

@bernym4047 4 года назад

I learned so much about cycle battery design and technology from this video. Excellently produced with superb audio, lighting, focus and video-photography. Many thanks.

@tommycalaway7983 3 года назад

again you blow my mind with the how easy you make it all look. it's actually quite encouragingso old high school dropout like me becoming quite the electrical engineer thanks to your RU-vid channel. if I had copies of your books the future would be Limitless.

@artfree-spirit7214 5 лет назад

Great stuff Micah! Love your work and books!

@JariJuslin 11 месяцев назад

Thanks! As someone intending to build a custom battery housing (and then have someone better informed solder and wrap the cells) this was very useful. One note: you say the cells are going to get really hot when discharging at the highest rate. However, the 2C reading is rated for -20C...0C. If we're like -10C, overheating is not going to be the first and foremost problem unless you really somehow manage to keep the max load on on continuous basis. On subzero temps it's usually different things than overheating that dominate the risks.

@domeshining5473 5 лет назад

Thanks for the very informative video. Been very interested in creating my own battery packs for a while, and your videos are helping a lot.

@Pierre048 5 лет назад

Super Informative Video! Thanks.

@WalterClaus 5 лет назад

Very informative, I'm so glad I recently found your channel! I'm learning a ton of interesting info, thank you!

@dearThax 5 лет назад

Love these videos. This was especially informative. Great work!

@specialk22tt 5 лет назад

Great video idea. Really helps us learn in a very practical way.

@warrenkrup 3 года назад

Thanks Micah, always appreciate your videos!

@mandog2142 5 лет назад

Micah, Super evaluations and videos. Very thoughtful and thorough! Thanks

@joemehere1151 4 года назад

Thanks for taking the time to educate us. E- bikes are coming!

@jamesjohnson9557 5 лет назад

Always learning. Thank you

@biofarmer674 4 года назад

Thanks for sharing all of this useful info. Very helpful getting up to speed with what's inside the e-bike battery

@stevelacroix2917 5 лет назад

Got one of your book hope to win another......this is about quality, and I'm glad your covering this.

@mikesumner5320 4 года назад

Great video. I am starting out with e bikes and this helped demystify lithium batteries as well as describe best practices for construction

@christianvic2 5 лет назад

Thanks for another great video. Always informative!

@BOOMSCARRR 4 года назад

Thankyou For your straightforward explanation

@leslielaw880 5 лет назад

Thanks for all the good information I've been looking to buy one for a project

@dreamkiss4u 5 лет назад

one of the most useful videos i seen on this topic loved it.

@karlschwab6437 4 года назад

So interesting on ebike batteries! Thanks so much for doing this; I had no idea on how complex these ebike batteries can be! Thanks again.

@davidlittlefield2483 4 года назад

Thanks for the very thorough and informative battery review. Well done.

@pauldjerassi620 5 лет назад

Wow what a great evaluation of a ebike battery cant wait for your next one ,Thank you PD

@johnsanicola3480 11 месяцев назад

Fantastic and very informative. Your detailed descriptions are on point. Learnt something that is actually useful. Thanks!

@CDLynas 4 года назад

Love the ethos of this channel, keep it up mate!

@bathanmark 5 лет назад

One of the best video I have seen so far. Thanks

@78suntan 4 года назад

Thanks for the information. I like how you go into detail.

@jamesceastep8874 2 года назад

Thanks for good detail, clearly explained & photographed. - Jim

@mohammedelbaraka4202 5 лет назад

Thank you for your honesty and integrity!!

@thomask837 5 лет назад

Thanks for that. Very helpful!

@David-xr2sc 5 лет назад

Awesome video. Not only did I learn how to check if a battery is good quality, but I also learned things I can improve on my DIY 18650 batteries.

@wabuhwabuh8674 3 года назад

Appreciate the lessons! Learned a lot!

@geraldrobichaud349 2 года назад

Thank you for all you do . I've found this video really well done and i learned a lot today.

@KhangTran-dj3lx 5 лет назад

Very informative! Thanks dude!

@caseytaylor 5 лет назад

Great Video! Great tips for analyzing battery pack performance as well as individual cells.

@frankakers8019 3 года назад

These videos are excellent tutorials for ebike owners & DIYers. Also great for segment teaching Industrial Technology skills & procedures

@simonrompre 4 года назад

Thank you, very informative, batteries are a very important ebike component and knowing what is inside the case is very helpful.

@kingcryptobro800 6 месяцев назад

Great Vid, would love to have a couple of your books when the time comes for my Ebike modifications. Thx really for the info.

@oze-bikes4life663 5 лет назад

Hi Micah, As usual another "Great & Informative Video" 👍🏼 Your Battery Breakdown & Battery construction info was excellent, keep up the great Work..... Keep E-Biking & hitting those Trails dude 🚴

@farfromhomeandlost 5 лет назад

Great information, thanks!

@DKLVE 5 лет назад

Great job, you just made a very informative and important job checking that battery. I've checked my myself many batteries and what I found in some cases was very small BMS'S with small heat sinks. And all bad. I think that if BMS'S are too small they won't last to long.

@KevinWileyK 5 лет назад

A longer video is still good, if it's all actual content. Good work. You're creating a channel with quality information that I think I'll be able to trust.

@123prenyvkmg 3 года назад

Excellent video with very good and articulate explanation.

@tastin1674 3 года назад

Brilliant Thank you for delivering a clear understanding

@ki7a5 5 лет назад

I always learn something new in your videos. Thanks

@StudioChimps 4 года назад

Brilliant! Excellent lesson.

@00708046 4 года назад

Great video ! It covered everything . THANKS.

@o1ecypher 5 лет назад

I heard your book is the best thing to read for anyone wanting to build their own electric bike I'm here for this wonderful knowledge thank you for all the help man

@jddw6999 Год назад

Thorough review with balanced specificity. Now I am curious as to what battery manufacturers you like the most.

@sirkillall Год назад

I'm actually finding your videos quite helpful, this one was excellent.

@seeingeyefrog7191 4 года назад

outstanding work very informative thanks again!

@meatpoping 5 лет назад

Learning lots Thank you

@SMKreitzer1968 5 лет назад

Nice review, would be great to get one of your books!

@exgenica 4 года назад

At about 6.25, remember that the max current is quickly derated based on the temperature INSIDE the CELL...not the temperature in the case or general environment. So in most cases if one tries to take it up to the max current without derating for the cell's internal temperature one would quickly have a possible explosion, fire, and/or other catastrophic cell failure.

@mrhills845 3 года назад

very professional! thx a lot!

@davidwellen830 4 года назад

A lot of good information. Thanks

@MoeNegm 4 года назад

You are the man bro! Really geniune down to earth. I subbed, great Content

@markjohnstone4914 5 лет назад

Great review that helped a newbie like me to learn some things! Video was NOT too long...curious as to why you did not do any tests on the pack to see what it was capable of? Thanks again!

@BillTheHawk 2 года назад

First time I have watched one of your videos. Wish I had known about this channel long ago. Great information. Thanks.

@exgenica 4 года назад

I'd run an electrical test first. Could save a lot of my time. At the end of the video you still don't know if the battery pack can in fact deliver the advertised Ah. In addition to the visual inspection, I'd have to use a battery tester before concluding it could be a quality battery. A "constant current" battery tester for up to 200V and upto 180W total dissipation is available for less than US$40 and can rapidly give you pretty good insight into the Ah the battery can deliver in reality...not just as claimed by the seller. I'd run the electrical test first. It's a fast, easy and definitive way to tell if the battery is even capable of delivering anything near its claimed specs. It may take 3 or 4 charge/discharge cycles. Only then, if it passes that testing would I worry about taking it apart for visual examination of build and component quality. Running the electrical test first could save a LOT of my time if the battery is low quality, and it generally should be safer, too. BATTERY PACK PERFORMANCE ISSUES: There are batteries out there that use counterfeit lithium cells, or even intentionally low-quality cells, so even if they are marked like they came from one of the known high-quality manufactures (Samsung, Panasonic, etc ####mAh rated cells) the cells themselves may in fact not be from that company nor provide the claimed mAh rating. Even the battery pack manufacturers may unintentionally get counterfeit cells once in awhile which can cause major underperformance. These are common issues for example in USB powerbanks. Example: one powerbank brand CLAIMS 10,000Ah capacity while using what turn out to really be 800mAh cells in a 6p1s 18650 configuration...which could at MOST rightly claim 6x800mAh=4800mAh (yet they are LABELED as 1800mAh NCR/Sanyo/Panasonic cells which they clearly are not)The same issues exists in many battery packs for many different uses (including e-bike packs) available on eBay and Amazon.

@exgenica 2 года назад

@@hchalmoepas6544 I can't recommend any specific ones, but there are some custom battery pack assemblers that have very good reviews on ebay. There are a number of individuals and companies you can find recommended in electricbike.com/forum You can find some sources recommended by DIYers that can provide just what you're asking for. The generally provide good battery packs because of the feedback on the forum. I've found the group very helpful and knowledgeable.

@thetechgenie7374 2 года назад

Yep exactly I seen so many falsely advertised and using junk, or fake cells. I finally got one that was as advertised and using LG IMR 18650 cells 2850mAH and tested on discharge pretty close, or slightly above, so definitely genuine and was cheaper then this pack in this video. I was actually surprised as was expecting Chinese FST cells, or one of the 3 common Chinese cells they use. A few packs even have had where BMS was miswired on discharge side and literally could drain battery down to zero as they bypassed the low voltage cutoff on the BMS? Don’t get me started on those packs claiming to have Panasonic cells using Sanyo and not the GA cells, so technically not Panasonic, or not even using neither and lying completely and charging $400 plus for the pack. I guess they figured out most won’t open the pack?

@taigaw67 5 лет назад

Awesome video. I will be sure to look for your key points when I buy my next battery pack.

@ebbstar 5 лет назад

As always, great info on that battery.

@DanGaskell 5 лет назад

Very informative!

@johnflahr5866 11 месяцев назад

You do seem quite knowledgeable , I like your style Also happy that you do not usually use factory or other providers to do the free advertizing ,that usually is redundant Thanks and keep up the good work

@Doctorbasss 5 лет назад

That's an excellent review! You examined every important points including common CONS that cheap battery have. Btw, sometime when a parallel group have the main positive or negative wire soldered to one end of a parallel group, there chance that the opposite polarity have a serie link to the other end, which conpensate for current balance.. but in that design where serie parallel connections are in majority in "W" there is les chances. Also i would have been curious to see if teh ON/Off switch is connected to the BMS SW1 input.. usually located close to the external temp sensor connections... in fact BMS with switch input and temp sensor are usually input that are connected in serie.. and when there is no external switch used, the connections on teh PCBare simply jumped together to close the loop and enable the BMS FETS.

@mccwiseley8085 4 года назад

Your videos are very informative. I was hoping to see part 3 of the e-motorcycle build but I guess that is in the future. Keep up the good work. By the way. Motorcycle screws especially those connected to the engine are impact screws and you need to use a impact screwdriver to get them off without stripping the heads. In expensive tool but essential for motorcycle work.

@dickeywalt 5 лет назад

Awesome video. I really like this style of review.

@RPMac 22 дня назад

Brilliant...thank you !

@1hjehje 4 года назад

Excellent video ... Thank you.

@JeffMoche 3 года назад

Great video. Very informative.

@kurtismckemmie4850 Год назад

I'm so glad I'm watching this video again. I have a couple cells that are not fully charging. When I took the battery out of the sleeve (I have a ancheer step through, no longer available on Amazon ☹️) they hot glued the wires and hot glued it to stay in the sleeve. It was a fight getting it out! I removed it very carefully without pinching any wires. Just waiting for my money to come in so I can order a couple parts. Spot welder and heat shrink wrap that you recommend in one of your videos.