Making 2S 18650 Li-on Battery Packs for RC FPV Models 

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thank you for this excellent contribution to the fpv hobby.

the best tutorial ever. so clear. thankyou so much.

best tutorial on the internet, really appreciate it, supporting your channel from Afghan / Balchistan

Very helpful video, thanks for sharing.

Excellent video, I followed along and built my own as i watched and it works perfectly!

I'm glad you made this video. I have two 21700 5000mah cells and need to make a battery for my Radiomaster TX16s.

I've been looking at doing this a while now. Thanks! New sub!

C’est très gentil 👍

Great video really helpful

Another great video Matt! I've been making these for my goggles for awhile now. Finally got my hands on some higher C packs to make some 3/4s packs on my AR wing. I'm hoping I can get from 19 min on 2600 4s to 25 on these lions. Keep on keepin on man!

Is there a way off making some sort of 3d printed carrier with wiring all ready installed balance leads and charging leads. so you could just put your cells in and you have a battery pack?

In Cyprus, I cannot order from Hobbyking anymore. The Lipos here are ridiculously high priced. I might get some Li-Ions still from China and they are quite cheap. I recently got some Samsung 28A 4.3v out of an old laptop. Soldered them together to 2S. They cannot power a 1/8 scale brushless car. But a Flying Fish is totally possible. I am impressed. If they are new, man, would really save me some money. Made a 3S pack today to support a 3S lipo in my 1/8 scale in parallel. Works.

Hi. Thank you for sharing this awesome video. I am new to RC. My RC car came with only one battery pack. After I came across your channel and I would like to make some extra batteries (2S) with 18650 batteries like yours. Question... can I or should I charge this battery packs with original charger that came with my RC (it's a usb to balance cable charger)? Or should I buy a better charger (smart rc charger) to charge them? Thank you much in advance. Cheer! :) Jack

Ive got some more balance leads showing up today so im going to make some Li-Ions with you

Here’s where I’ve found myself. Bought several 18650 and a charger for my jumper tx. Got some more to build packs based on your video. … And saw a dump battery holder package. So I’m now thinking what’s the big advantage of building fixed packs versus putting separate cells into packs then charging them separately? Of course thats just a bit bigger and a bit less convenient. But seems to me not a lot. Thoughts?

Thank you, yours was the most informative and simple. Is these suitable for hubsan 501s?

Good idea. But I was forwarding your video and I can resume it in just one minute jeje.

Great video. How much did the final battery packs weigh?

Have you tried chilling the batteries for an hr in the fridge before soldering them? Sounds plausible that would prevent internal damage.

Great video. What kind of cables did You used for doing this? Thanks in advance

Great video! Isn’t it dangerous if some solder drips into the + button? I was always told that if metal gets in there the battery can overheat and explode.

So in my country is very hard to find rc batteries for rc airplanes, with this here I can use to power my setup? The lead with the 3 wires go to the reciver right?

You say, “solder left side of balance wire to the positive” but how do I know which wire On the balance lead to use. Which way do you have the balance plug to associate the left side?

Could have used this two months ago! I had to wing it and hope i didn’t blow myself up! Made 3 cell versions for my ranger.

New to rc hobby and don't have any knowledge about batteries. My question is which plug will you use for charging? the balancer or the T-plug?

Awesome video straight to the point.. love your enthusiasm we could be good friends lol

would love to see a field charge pack video build

maybe this was commented before put if you shorten the + and - so that you take off the length of one battery the total length will be ultimately the same but you save a little extra weight.

How much amps can u pot on the Cells? do they have an indicator? like 10c 20c aso. ?

do you think you could build one with enough c rating for a rc race car 2s?

Love your videos. I have a bunch of Sony VTC6's and a speed charger I use for my Fatsharks...can I just buy a 2s 18650 battery holder and solder an xt30 on the leads and use it that way? Will it add too much weight with the holder in the Dart250g? I really don't want to solder my 18650's together because I use them for various transmitters and goggles.

Hello sir.The way you wired these packs does this double the amps, let's say if each battery had 10 amps total amp that could be draw from each battery does this mean that both combine is 20 total amp

Hi! Do you have an instruction on how to make 2s2p? Soon will arrive my Volantex Ranger V2 1200 and I would like to power it with extended 2s li-ion. May be you have any recommendations? Thank you!

I have some of these laying around, EFEST IMR 18650 3500MAH 20A. Are they good for this use or is their chemical makeup not compatible?

can i use lg choco vape battery for that project for my rtr rc truck?

Hi, I’m really new to all of this but I fancy having a go at fabricating batteries for my Dart and drift. I followed your video and it seems to be pretty straightforward however my concern is how far to let the battery’s discharge without the rx and esp. shutting down would it be sensible to disharge them to say 5v and then change battery packs this would I am assuming still give me pretty long flight times compared to the li-po batteries. Is what I am saying making any sense. Cheers oldsurveyor1944

Have you used the Samsung 18650 30Q type ? How low can you run them ?

It is cutting board carnage.... get yourself a silicone mat Matt ;)

Made my first pack for the drift 2 weeks ago. Brilliant pack, another excellent intuitive video matt. What’s the name of the tune at the end of your video please? 👍

Hi Matt...so for Dart 250g which battery blue or green....not doing mega distance but park flying with longer endurance than lipo for the moment

any alternatives for nickel strip and insulater ring. because I have all the things except both of them please help?

Normally it is forbidden to solder them, maybe she will damage or explode/burn easyer. Oke, I have thse bms board for 2S only when the batteries are not yet empty the board do not switch to charge mode. Is this normal? the voltage of 8.4 volts stays on, and so when connect a charger it gets problems, what I need to ste charge mode? maybe higher voltage input? I do charge with 5 volts.

I have been struggling with making the solder stick to the battery cell. People keep saying that I need a high wattage solder (somewhere between 60 and 100 watts); however, my solder is 30 watts. May I know what is the wattage on this solder you were using?

Good morning when you should use the BMS protection board ?

I can use this pack of 2s my cordless drill machine?

Good vid but tab welding is a better option if possible

Hi, what are you using to charge up these 2s 18650 packs? does it need a balance charger or how does that work..i'm building some packs "from laptop batteries unprotected" for my kids cheap rc but im a bit of a newbie to some aspects of charging machines and 2s packs.

Nice to know they don’t blow up under the torch lol

what AWG have you used??

i just did a couple of 21700 4000mAh packs for the 250g

I'm after some new batteries for my ZOHD DART 250G 🤔🤔

have you tried the 21700 ? they are slightly heavyer, but can store 5000 mah and is still lighter than 26650

Hi I have ncr18650be which have max discharge about 3.6A. is it safe for plane ESC? Thanks in advance

it is always a bit of hazzle, work and adventure but with rewarding results to make these on your own. And to be honest: you do no longer rely on what chinese company put in their fancy name products from hobbyking and Banggood and make your own Zippi Happy bag or however you will call these and in a better quality cause you can make sure what quality cells you buy. I tend to go with the Samsung INR 3500 mAh cause they are good, cheap and for mulitple purposes usable like e bike battery refurbishing or tool refurbishing (Bosch 14 or 18 V Akkus for example). If you buy 10 of these cells you get them in Europe for cheap like 34,50€ inkl. free shipping in germany. And you can be sure: these samsung, sony, LG cells deliver the amount of mAh as is in the spec sheets mentioned. 2 put together for 7€ are unbeatable even though you have to pay a bit for the balance leads, nickel strips, that kapton tape and connectors ... but you always know: brand new Samsung cells capable of delivering 80% plus mAh after 500 charging cycles so you can count them down easily by writing down the amount of energy or mAh you had to recharge afterwards. 1 charging cycle in this case means 100% delivery / charging, so if you fly once down to SOC 30% and recharge it fully to fly it down to 10% then you had charged what ? 70% + 90% = 160% and this means 1,6 charging cycles - not 2. Short flights with low energy consumption will be counted in the charging life cycle by the amount of charged energy and not the count of charges. The Samsung cells do not dy suddenly if you are over 500 charging cycles they simply tend to charge less energy so flight time will be reduced and you can count on them for 1500 charges and still above 50% SOC capable cause our lawn mower battery pack made it over 2424 working hours in 3 years and these represent 1500 charging cycles cause we knew that each time the battery SOC was only used for 70% which we knew due to the running times between charging and full running time without recharging. To keep things safe I used them up to 500 charging cycles being aware of the capacity cause every 100th carge I measure them out. Afterwards they will be reused in powerwalls or other applications cause they can last much much longer in low Amp use cases. buy 100 and you get 3,7V x 3500 mAh = 12950 V x mAh = 12950 mWh = 12,95 Wh which equals 1,295 kWh that is roughly 10% of the energy a family needs each day. If you buy 200 then you will have the storage your family needs each night ... and that is where the Powerwall journey starts, so buy a fey and a first solar module to start you experiments. Best use case is a portable battery chargerbox that you can use at the club out in the field to recharge your lipos and carry back home to connect it with 1 or 2 solar panels which will charge your charger box. Start small from here and look what others did to understand the solar power for your RC chargerbox or motorhome or boat to gain experience cause this is the easiest way and cheapest cause the solar panels deliver DC and the battery need DC ... Here for german or european buyers the cheapest source for genuince Samsung cells www.ttt48.de/akku/lithium-ionen/18650/samsung-inr-18650-35e-36v-37v-3500mah-lithium-ionen-akku.html?sort=1

Is 5amp ok for a zohd Nano talon?

Can I use li-ion phone batteries for making 2S battery pack?

Is there a reason why Nickel is used instead of copper for connecting the cell terminals?

Hello sir? You said in one of your replys that you charge these 18650 on lipo settings is this safe and why use this setting thank in advance

Want to make a 6v battery to be used in a 8.97v 3A 3W solar panel

It is Same with bms ?

matt how do you charge these packs up and with what charger please can you help

Do you have to use the nickel plate? any reason you couldn`t just use some 14awg wire?

Hello i want to ceate one li=ion for my futaba T14sg on 2S think you is possible to works with my radio ? thanks .

/hi Matt. What is the soldering iron temperature?

How could I make this work for a dji mavic mini 1. Is it possible?

I don’t undersrand how these batteries are more expensive than LiPo. The price for 4 of these is around 20€ while the 6s 10k mah batt is around 200€ which weights 1 kilogram.

@4:32 "A sOlDeRiNg IrOn WoN't MaKe ThEsE hOt" @7:39 "look they didn't get hot at all" **touches nickel plate with iron for .5 seconds. @8:15 "OUCH that's really hot"

Matt, could you just say something about charging these batteries: how does it differ from LiPos, can they be balance charged?

Samsung 25r best

How about 3 batteries?

What is the discharge rate of each battery sir?

It's Negative not Ground.

Also, why don’t you use the battery protection boards that I see can be obtained very cheaply. Is it because they might be a possible failure point?

What happened at 38:09?

baa-trees?

نحتاج ترجمه عربي

No BMS?

Great video Matt.... your English is getting worse ! 😝

Here's BMS not use

"some solder, a soldering iron and some common sense" .... nope

why do you scream?

👎too long video

Duh! A very long video which only produces a couple of 189650s and plugs, but where is the electronic infrastructure to charge and discharge them?