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    [SOLD] TSDZ2 36V 250w/350w mid motor kit [COASTER BRAKE]

    I am selling my very-lightly used TSDZ2 36V (250w/350w) motor kit purchased from PSWPower. Be advised that this is the COASTER brake version and will only work as such. There are no brake levers included in this kit. I haven't been following much on ES so I don't know if this kit can be modified...
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    Aliexpress' AERDU 36V 14AH NCR18650GA battery pack - review

    I bit the bullet and paid $146 shipped for the AERDU 36V 14AH 10s4p NCR18650GA battery pack. This was purchased from "AERDU Official Store" but they told me "AERDU Sunway Store" is also the same. The delivery took a total of 2 weeks from China to USA, not too bad at all. It arrived via 3rd...
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    AERDU 36v battery pack from Ali Express

    What does everyone think about buying this AERDU battery pack on Aliexpress? https://www.aliexpress.com/store/product/AERDU-36V-10S4P-14Ah-For-NCR18650GA-with-25A-Balance-BMS-42V-lithium-battery-pack-ebike-electric/3173029_32952849547.html?spm=2114.12010615.8148356.8.2f0e1b23ZpG1RX It uses...
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    How to mount full-size flag pole to standard 26" bike?

    Hello I need help on how to fabricate or buy components off the shelf at local hardware store to mount a full size 6 foot 1" diameter flag pole on my standard 26" Townie bicycle. I want to ride around with old glory flying. All the flag mount poles brackets are meant for mounting on a flag...
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    New Bluetooth Smart BMS by BMSBattery.com

    Did anyone see this? https://bmsbattery.com/bmspcm/833-smart-bms-10s13s-60a-with-blue-tooth-android-or-ios-app.html for $45.00, this is pretty good deal it seems. Anyone bought it and tried it? I like how you can finally get a screen on your phone to show you all voltages. I need to buy a...
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    If you are building packs today, which cells to choose?

    Assuming you have a 8T MAC motor and BBS 48v, and you want to build a new battery pack, what cells would you use? Assume that you require 30A constant. Right now, both my battery packs are a meager 10Ah and after 2.5 years, they lost capacity. I'm down to 6-7Ah at best. Having learnt my...
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    Is there a 13S or 14S balancer and charger for Li-Ion?

    Is there a charger and balancer that can support 13S or 14S simultaneously? Or do you have to buy one of those dual channel iChargers that can do 1-8S per channel and just split it up? Is it possible to charge a 48V 13S pack using a dual iCharger and splitting it among two channels? I guess...
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    Accidentally hooked up batteries to each other, BMS died

    I have a Signalabs 48V BMS and it has the usual C-, P-, B- discharge ports. C- is for the charger negative, P- is the load negative, B- is connected o the battery negative. Long story short, I screwed up and accidentally connected another 48v battery to the first battery which is at a higher...
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    New style downtube\dolphin battery case !

    I just saw that BMSbattery and Aliexpress is selling this new style dolphin battery case. It also appears that it can hold 1P more of cells. So a 13S5P seems standard for this case...
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    Ghetto balance charging my out-of-balanced 36v 18650 pack!!

    So I asked the question if I could use a 1s1p 18650 wallcharger to balance charge my 36v 10s4p which went out of balance after 2 years. I bought this battery 2 years ago with very little knowledge of building batteries back then so that's why I bought it. Anyhow, this battery pack would only...
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    Where to buy correct size battery shrink wrap ?

    where can I buy the proper battery shrink wrap, rubber or blue plastic like the ones seen, for a 18650 4P brick? So assume you have four 18650 cells in a row, with 10 rows. That's 10s4p. What shrink wrap size/dimension would fit this? Thanks
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    Bafang C961 display speedometer problem greater than 27mph

    I have a BBS02-750w detuned to 18A and runs the C961 display. The bike is a 16" folder. So when the bike hits about 27.5mph or greater, the display gets funky and it starts reporting the speed backwards.. like jumps to 14, 13, 12mph, while i'm doing 28+ mph. When I put the bike on a stand...
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    Has anyone ever blown a IGH hub?

    I was just wondering if anyone ever blown a IGH hub (shimano nexus or similar) by applying too much power? 1. if so, what are the symptoms, and over a course of how long, distance? etc. 2. when blown, can they be rebuilt? just curious
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    My 16" folder Mid-drive BBS02-750w build - COMPLETED

    Hi everyone EDIT: SEE POST BELOW FOR BUILD I'm doing my second build now. I just got this bike in the mail. I'm planning to electrify it with a bbs02 750w 48v 13s4p. I already have a 26" townie, Mac8T, 48v, and my gf has a 26" townie with bbs01 36v. I'll be using the downtube frame battery...
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    Is 52T / 16T cog stressful on Nexus 8spd w/ BBS02 ?

    Which stresses the Nexus hub more? Using a 52T chain ring up front with a 16T rear cog or using a lower tooth count chainring, like a 46T ? This is of course, paired with a 750w. bafang mid drive bbs-02 on 16 inch wheels. If my understanding is correct, the 52T would stress the rear more, but...
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    Can someone help me calculate Nexus 8spd gearing

    Hi I would like to compare cadence/wheel speed for the following: 16" wheel 52T chain ring and 14T rear cog versus 16" wheel 52T chain ring and nexus 8 speed shimano hub (tallest gear) how big of a difference are we talking about?
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    Help on my next build-Downtube 16" folding + BBS-02 750w

    Hi everyone So I've narrowed down my next build and requirements: 1. Folder 2. 16" wheel for compactness 3. Gates belt drive 4. bafang bpm 750w 48v (Paul Em3ev's kit) 5. 8 spd nexus internal geared hub I already have a 48v triangle frame battery mount that I will interchange between my...
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    Bafang bbs02-750 48v on a 16'' folder bike, good idea?

    Do you guys think it is a good idea to throw a Bafang bbs02 750w 480v on a citizen Tokyo 16'' folding bike? Speed and compactness is the main priority :) Goal is to reach 20-25mph minimum.
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    What kind of 20" folder has hydraulic brake?

    I'm looking to build a second bike, a 20" folder and it must have hydraulic disc brakes. Anyone know of a brand? Right off the bat, the only one I can find is the EasyMotion BH Neo Volt/Sport but that is already a off-the-shelf eBike. I'm looking for just a folder that's not an eBike. I...
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    Bought a folding bike (3spd nexus hub) for my mom

    So I just bought this $399 3-speed folding bike for my mom. For $399, this thing is lightweight and quite strong. I'm very surprised at some of the build quality. The 3-speed nexus hub is DAMN smooth as hell. The bike rides really nice and smooth right out of the box. I like it so much that...
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    Building new battery - what's the latest technology now?

    I'm thinking about building a new battery pack, higher capacity and discharge. I am currently using Samsung 18650-25Rs. Great cells, but would like to see what else is out there. I'm looking for safe and long lasting stuff. No Li-Po crap.
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    Are insurance premiums affected due to ebike violations?

    Yesterday, I got pulled over on my Mac 8T Electra Townie here in Orange County. I wasn't speeding but I blew through a total Red light. The reason for this was that it wasn't truly an intersection (a cross). It was a T intersection. Where I was headed, the bike lane goes straight and...
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    How do you add 3-spd switch to Lyen 12-fet mark2 controller?

    I bought a Lyen 12-fet 3077 mark 2 sensored controller. It does not have a connector for the 3 speed switch. I'd like to wire one up. So how can it be done? Do I need to open up the controller and solder some wires to some place inside? I can't get ahold of Lyen
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    Can you add-on 18650 cells to existing pack?

    I am wondering if you build a 48v 10ah 18650 battery pack 2 months ago, fresh, brand new cells,...and say after 30 cycles, you decide you want more Ah. Can you purchase the same exact battery brand, type, model, (In this case the Samsung INR-18650 25R), and then add on to your existing pack by...
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    Who has this problem with their battery fuses burning up?

    So, I'm using the triangle frame mounted battery pack and it has a 30A blade fuse. After about 10 minutes worth of ride, the entire bike dies. The output port intermittently gets bad contact of power. I opened the pack and turns out that one side of the blade fuse holder is loose and giving...
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