afia2k8

Looks like they dont use Samsung or LG cells anymore. They use Lixell. Cant seem to find any info on them. Maybe I'll try opening up another battery. Guess I'll just have to try it out on my ebike.

Hey guys, Just bought Aldi 20v 5ah/40v 2.5ah battery. £24.99 with 2 years warranty. Perfect to take on airplanes (90wh). Works out to £2.50 per cell if you're harvesting. These costs £30 before covid! Im a bit confused on how to wire 1x 40v 2.5ah battery to the controller like this guy did: From what i can see, wiring b1- to b1+ gives you 20v, and b2- to b2+ gives you 20v as well, watch from 47:50 - So im guessing i need to wire b2- to b1+. Then for the controller it will be b1- and b2+ for 40v 2.5ah? Would 10s1p be too harsh on the cells? Better use 2x batteries in parallel or 2x batteries in series for 40v 5ah?

Deleted soz. Wrong forum

Hi Nealh, I'm assuming the above you're talking about max current (peak current). However, if i were to get a kt 09s - 9mosfet 48v 22a controller and limit the max current to 10a, the Rated current (which i assume means continuous current) will still be delivered at 11a (instead of the 7a on the kt36v 15a controller). Hence, 52v x 11a = 572w continuous on a 250w motor. Will that be okay?

Oh wow okay i can see everything now. Madness. Absolutely not worth it even with the so called 60% off. There's a £50 UK specialist shipping fee as well on top. Bike: Air £399 + £50----- (2.6ah 98wh 15km) Max £499 + £50---- (5ah 180wh 30km) Folding bike (fork 75 - 80mm) Air £524 + £50 Max £624 + £50 Est delivery July/August

Oh wow that's really low. How did you get the ah info? I tried looking everywhere couldn't find it. Did they tell you what the early bird prices will be tomorrow?

[mention=9614]Nealh[/mention] The new Swytch pocket size kit is being released tomorrow. I've got an early bird link for 60% off. Do you think if the price is around £300 it will be worth buying?

20a is insane! So if it's too hot to leave my hand on i should reduce the amps? Or use a thermometer and if it's above x celcius? Any idea at what Celcius does the nylon gears start to melt?

Thats absolutely mental. The swxk is a strong hub. Can i ask when you say "limit the current to 12a-15a and see how it goes"; what do i do to see how it goes? Go up a hill then touch the hub and controller to see how hot it gets? In the lcd4 it says there's a temperature function but im not sure if my akm hub has a temperature sensor?

Thanks. Would it be better to get a 12 mosfet 48v controller to be on the safe side or is that overkill? Is that 672w peak power safe for a 250w motor? So if I were using normal 48v 13s; a safe limit is 15amp controller will equal to 13s x 3.7v x 15a limit = 722w peak power?

I see. So I'll get a new t09s 22a controller and limit max current to 17 or 19amps. In the meantime, is it okay for me to use 3x power tool in series= 15s2p. So 4.2v x 15 = 63volts 4ah Or is that too much for the controller and akm74 motor to handle? If so I'll just use the 36v for now till i have time to build my own battery. Whats a reliable place to buy 18650 cells? Liitokala on AliExpress?

It's about 40 - 41v fully charged. Looks like everything is normal then. Thanks!

Even when nuts are released there's still no freewheel. Anyone know whether this is normal for 16inch motor? Wow! 120kg load still PAS 2 or 3 only? That's really good! Just have another question. I'm using 36v 4ah power tool atm and at 36v lcd reading it's already showing only a 1/4 battery left on the display? Is this normal? And sometimes it would fluctuate down to 33v on hills then go back up to 36v once flat again. For battery preservation, shall i set Low voltage cut off at 32v?

Thanks, is it worth getting s09s controller? Also, would it drastically reduce the life of the akm74sx motor? My normal use is level 2 with pedal for flats but when i reach the hills i use full throttle with pedal. Starting to get into cycling again and trying to lose weight. From the video as soon as i stop throttle the wheel doesnt freewheel. I dont think it's pinched at the dropouts, i think i used 30nm torque wrench with standard brompton fitting as torque arm

Thanks. So ultimately this motor isn't as capable as the brompton kits from grin tech and sparticle kit? I thought I could get a higher amp controller and 48v to at least increase torque by about 30%? And is the lack of freewheel normal because it's 16 inches?