DIY Stealth Enduro Battery! Create a Powerful 72V 40AH Battery for Cheap! 

Wow those are some kind words, highly appreciated! Great to deal with you as well Jason ! 😊

Sure it can. I made a 72v 12.8ah pack by tearing down two of these packs to the cells and building it in a dp-9 case. From aliexpress I got side cutters, 5m battery cable, JQ-DHJ02B spot welding PCB, 10 pack of xt60 connectors, 100pcs pure nickel strip, and a 33M roll of kapton tape. All for about $85 shipped, hooked the spot welder up the battery from my truck. The spot welder works great for $30 but you need to keep your battery charged up or quality of the welds starts to drop. For my pack I had to do something like 300 welds. I kept a battery maintainer and a jump starter hooked up to it. Or you could run a couple car batteries in parallel. Now labour and safety... This was a completely new skill for me so it took me days of research and labour to pull it off and I was worried the entire time about burning my house down if I made a mistake. If I did it again I'd probably set up to work outside in a spot that I could just let it burn if something went wrong. If you don't know what you're doing and you value your time and safety this is not worth it, but it's cool to ride around on a pack I made. I've got my controller limited to 2kw but my pack can do 3kw easily and I've given it a few bursts of 4kw with no problems. The packs, case, and bms were $380 shipped so in total I spent $465. Over a third of my cost was in the case and BMS so if you're building a larger, caseless battery like a stealth bomber and get a better deal on a BMS you'd be saving even more.

Thank you!!

Thank you ! :)

Yes you absolutely can!

This particular battery has 12 parallel groups rated at 10A each so 120 is really the max current you would want to draw. Max charge voltage is 84 volts and minimum is 60 volts

A few wrong moves and it is a bomb! Definitely for the experienced or patient and willing to learn and take it very slow. Something like this is no joke

@@ElectricBikeLaboratory I'm not mathematical so I decided not to mess with building one

We did we do have videos of those as well , send us an email and we'll send you the links to those.

Hi there , they are all connected via nickel spot welding in this case. The packs are our ECO packs (36V) that are 3 stacked on top of each other and then each group is connected (group directly above /below connected). Hopefully this helps!

@@ElectricBikeLaboratory ECO packs?

​@@wtfvids3472 Yes there are links in the description

​@@ElectricBikeLaboratory i bought 300 cells to replace my own 72v 48ah battery's dead cells. can i just reuse the same bms?

@@wtfvids3472if you ricreate the same diagram of the older one I don’t see why it would not work. I’m curious if we can create a bigger battery, whit the same voltage of the original but whit more amperes, and reuse the same bms.

We sell them but they are only on Lithium Ion

@@ElectricBikeLaboratory That should work, how much usd for a 72v 30 ah pack?

Correct, very low current flow from parallels. All current flow is in series connections

Yeah they are super convenient! The vast majority of the packs hover right around 37V when we open them up and we do a quick check on them to make sure no dead cells of course but it is definitely quite a simple process :)

How do you check dead cells without dismantling the pack ?@@ElectricBikeLaboratory

Hey there, we paired up with an MXUS 3K Turbo motor and KT 56-90v 60A Controller

Yep we can email us at affordableebikes@gmail.com

@@ElectricBikeLaboratory Hello

3 x 12AWG Cables

If you want to connect 2 separate batteries in parallel, you can just connect them both with a Y Splitter. Make sure the batteries are same voltage. If you're building a large pack from smaller packs, and stacking them in parallel, then yes you need to connect all of the groups on them. Hope this helps!

@@ElectricBikeLaboratory yes i think 1big battery is better and maybe safer

Yes I agree ! Good luck let me know how it goes ! 😊👌

We have this one on our website and if you have a frame that can hold 21700 cells or if you need a frame we have them. Were going to be selling a 72V55AH pack that fits in these frames for a really economical price . Website is www.affordableebikes.ca

Yes apparently I didnt turn the camera on 😭

We're doing $175 per eco pack constructed into a pack + $100 for BMS (installed)

I have not built any LTO, so far just Li Ion and Lifep04

@@ElectricBikeLaboratory I have a couple of 48 volt 40 ah packs BMS 200 burst 100 amp continuous. Fast charger capable of 6 minutes to charge full. No MSDS Data. Biodegradable non toxic and non reactive to fresh and salty water. Disadvantage capacitance is about 118wh per kilo = 56wh per lb. Mine are 20,000 charge cycles and the spendy kind up to 100,000 charge cycles. 99% discharge rate full to empty= no lagg.

Yeah they are super impressive in their performance. Those are some crazy stats

@@ElectricBikeLaboratory yeah I don't think I will have to replace them, ever.

If those become compact at some point they will definitely become the ultimate battery!

Feel free to message us directly

@@ElectricBikeLaboratory 🤩🤩will do

@@ElectricBikeLaboratory email ?

Got your FB message best way is usually by email affordableebikes@gmail.com

Yes, send us an email at affordableebikes@gmail.com , thanks!

Sorry just responded to your last one! You can add as many as you'd like ;)

Thank you I did it 72 volt 75 amp 10 pack battery