 I mean think back to when you were a kid What sounds more fun than like one of those cool ride-on power wheels things? I've noticed the fact that this is not a brand name power wheels This is a cheap Chinese knock-off, but that's not the point of today's video the point of today's video is what's more fun? than one of these power wheels ride-on things a souped up one And as it turns out You can make them go double triple or even quadruple as fast simply by overvolting them Now you could do that by just buying yourself a in this case This is a 6 volt model so a 12 volt battery at the hardware store and plugging it in But this is Linus Tech Tips so instead of that I decided to order myself a DIY lithium battery kit Let's uh Let's see how this goes Pulse way pulse way lets you remotely monitor and manage all of your windows mac and linux machines from one app Create your free account today at the link in the video description Now I hadn't originally planned to do a video about this so you guys are gonna have to forgive me if I am not As prepared as even I normally am But I am going away to Disneyland in three days And I need to queue up enough videos for a while. I'm gone real talk real talk right now and I was telling Ed about this plan that I had to sort of trick out one of our power wheels Not actually this one and he was like oh we should we should do a video about that and I was like yeah I mean I'm still kind of like learning and I really don't know if this is the most optimal way to do it And he's like oh, yeah, no it sounds like a video so Basically what I've ordered here, so these are 18650s these are 3500 milliamp ones. I think they're from Samsung it's either Samsung or LG chemical or whatever they're like Chemicals like division is it's either Samsung or LG sells and then these are high current ones because Not on this one, but actually on the two-seater that I am planning to have all of this end up in You can actually see some pretty impressive peak power draw, so I got a bunch of these then I picked myself up this puppy So this is the charging Slash controller board that you need anytime you're building a lithium battery And I can't remember if this is a balanced charger or not So I'm gonna have to look that up so I can determine exactly what type of charger. I need to use on it I do have a balanced Lithium battery charger at home, but I forgot to bring that today All right Ah yes, you can see here. This is for seven cells in series so parallel determines how much capacity you have and Series determines what the voltage is going to be so this is a six volt model And I'm gonna be hitting it with about 24 volts, so we're gonna burn it out pretty quickly, but Realistically I was I was gonna get rid of this one anyway The idea is to make the the Jeep power wheels that I have at home go tight twice the speed And we'll making this one go four times the stock speed. This is one of the kits from Verusen Verusen I don't I don't know what they I don't know how they pronounce their thing, but basically Resists vibration Resists vibration loosening. It's safer. Hey, it's safe. Oh, yeah, what we're doing today building a lithium battery pack It's a modular lithium battery pack kit Just chill what it's all good. Don't worry about it fully customizable. Where where's the guide? Don't we have a bunch of like 12 volt batteries just like sitting in 101 Yes Well a this I'm building a 24 volt battery which yes, I know and B I wanted the weight and quick charging and I just wanted to do it this way because it's fun Okay to turn this bunch of cells into a battery We need to wire together all the cells correctly to get our 29 volts and 30 amps at full charge To do this will be creating a 7s 3p battery meaning there will be seven cells wired in series and then three of those wired in parallel Construction of the battery is pretty simple Although if we wire up one cell incorrectly or even just drop a natter touch a screwdriver across the wrong place We risk causing a short circuit that could electrocute us or at worst cause the battery to explode. Someone's gonna blow themselves up Okay, I think we should do the things first and then put yeah, I'll soon so then theoretically we can take your whole thing and Blippity bloppity Hold on and let me help you get that aligned. Okay Do you have a rubber mallet here? No, we're not rubber malleting these Because we're not because that's not a good idea. Well, I don't know maybe It's pretty hard to push on we did this three more times and got what seemed like should be a ready to wire a battery Until we actually thought about it. It's really easy before you begin They'll make sure you understand how series and parallel electrical connections work when I brush up on the subject blah blah blah blah blah don't short circuit that's bad got it I wanted Serial wouldn't I need to go? from here to here though Oh crap Oh That makes sense in order to do that you need to do every row oh This is easy. Oh maybe Well, let's find out. Oh they have videos. Oh Oh Okay We'll be back in a minute here. We're gonna watch some YouTube to learn Turns out that if we flip around every second cell creating the connections will be super easy by just placing the bus bars across The top so the good news is we weren't that far off Pretty much these bars go on and we make all the parallel connections between our cells. Oh Yeah, like it ain't no thing. I'm hold on. I'm just trying all my contacts here We good we good we good we good Beautiful now we have to attach the Yeah, I don't know so let's we're gonna watch we're gonna watch this other video now BRB All right, so we ran out of time yesterday. It's day two, but there's some good news I was able to bring in the actual car that I intend to use so This one shouldn't fry immediately when we hook this battery up, but there's some bad news So I had planned to either Hook this up with the battery management system for a single input charging Or I had planned to hook it up with this doodad and then use a balance charger like this one but I Forgot this is a maximum 6s Balance charger so this won't work Which means we're gonna have to use the BMS Except for one small problem. We can't find a single power adapter in the building that is So so you don't take the 3.7 volt nominal voltage you take the 4.2 volt charge voltage So this thing can't take magically like a 12 volt input and turn it into 30 volts you need an actual like 30 volt charger and 7s as far as I know is a pretty oddball configuration so I'm not sure how we're gonna charge it, but I'm gonna start to wire it up anyway I Found a 33.6 volt one. Do you think? It would work 33.6. Yeah, I don't know. What do you think the tolerances are like on something like this for input? Probably fine. We have 29.4. Is that what we're looking for? 29.4. Yeah, I knew those stupid hover shoes were gonna come in handy for something We're gonna cannibalize the charger Well, yeah, well, yeah, cuz I don't have a socket for this so first things first All the balance wires are on Go and my negative I believe this is negative charging. Yep. My negative charging wire is Soldered now what I need to do is Throw on two positive wires to the opposite terminal here. So to the positive terminal at the other end of the battery One of those will be for charging one of those will be for discharging Now I realize I'm opening myself up to some soldering technique Critique here But this is how it's going on. Alex. Do you want to solder me? I'm sorry Let's go for a solder bath Okay, that's lots. Oh man, I can feel the the cringing Just wait till the verge does this that'll make me feel better so we've got our eyebrow tweezers and our Butter knife. Okay. Don't don't include that last bit. We don't want to be too mocking of the verge We're not trying to make enemies in the industry. I don't have captain tape We really we really need to get looking at the The The The For all the viewers out there who know what they're doing with this stuff Make it better or worse that in many cases I know the right way, but I'm doing it this way anyway. Ah Now they say in their guide you don't have to solder this but I think that's really stupid personally I Think advertising this out Oh Stop it. Okay Stop doing that. Oh Nice now typically hat nuts aren't reusable, but I managed to kind of crush it back on there Okay. All right So we can test then Well first I'm gonna have to show you guys the before of course See pretty boring This is not the recommended way of doing this Again if you wanted the recommended way, would you be watching my video? Oh, we're gonna ruin our floors here we go. I Can't break There's no steering on this floor I Can't break Break There's no steering on this floor How's my phone is my phone okay, oh It sticks out of my pocket sometimes it's okay So that hat not not a great solution just bending it back So this is our pre-test this is with the original battery which has like a somewhat fresh charge Not super fresh, but it's not like the worst either. So reverse first gear Second gear Now It's really important for a reliable operation to install People do either 30 amp or 40 amp breakers in these things, but I'm gonna do that later when I do my whole ESC upgrade with the sewing machine pedal and all that kind of stuff. So This stock connector no longer has any use we are wired up now, baby Oh, that's reverse it's definitely faster That's first year and we need to move over to unit 101 Let's turn it up to high gear Oh, oh that was a that was an undesirable This is really hard I can't even use I Can't even use my foot. Oh really? No, I'm just using my hand. Oh lordy There we go, oh yeah J-turn oh, I tried to throw I tried to throw it in forward Wow the traction is actually pretty good out here So there she is. She's a little toasty. She's definitely Ready to be left to cool and then charged and that's it that's a DIY battery for better or for worse and This whole mess is brought to you by memory express memory express is the place to go If you need any kind of electronics products in Canada, they've got computers tablets phones Home theaters pretty much you name it and they've got it and with their uber price beat guarantee They will beat any price both in-store and online from a Canadian retailer So go check them out at the link in the video description So thanks for watching guys. 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