Recent content by 1DMF

Incidentally, while writing the above post, I received a full refund from the seller with the following comment. Whether they knew the capacity is fake or not I cannot say, but I received a full refund so can now take a knife to this pack and see how it is made and from what! Oh there are...

I took the scooter for a test run and this is definitely a junk battery. I have a 19A 350w (MY1016) scooter, and was replacing 2 x 12v 7000mah SLA batteries coz they only lasted 20 minutes and 4 laps of the park. This Li-ion battery when I checked this morning was showing 27.8v so it appears to...

Thanks for the replies. I was concerned about this pack, it's 7s3p and meant to be 28AH @ 29.4v (Fijila) bought on eBay. So based on the calculator I was using https://power-calculation.com/battery-storage-calculator.php That would require 4.2v max (3.7v nominal) 9900 mah 18650 batteries...

Hi, I'm interested in creating more capacity and volts for my EV's, and was considering buying multiple 24v 7s3p batteries and connecting them parallel and serial to create desired voltage and capacity (AH). However, these 24v battery starting blocks are 7s3p 28AH 45A continuous 60A peak BMS...

OK, good to know, thanks. :thumb:

It is fine up till @ 10MPH, then as the speed increases, it gets really loud and the vibration through the footrests very noticeable. I doubt it's 7000rpm, it's only meant to be a 3900rpm motor and even overvolting according to the calculator is only 4875rpm. I think misaligned sprocket due to...

I know I'm overvolting a 48v with 60v, but should it really be that noisy? I'm wondering if some of the vibration and noise is from the fact I'm running a #410 drive sprocket with a #415 chain? It's only 1/16" difference, but with a 3mm sprocket vs 4.8mm roller width, I assume that will add...

Well I spoke too soon :lol: Took my son out to the park, was running great, decided to test the torque, tried to climb a slope at low speed, just managed to get to the top, I thought, wow that's impressive, only then there was no power at all, throttle did nothing. I thought, oh well must...

Well I'm not sure if it was a dodgy connection or a faulty controller / blown MOSFET or a fried motor. I replaced my controller and motor and the bike flies! Sort of, as I shredded a front sprocket, so I also upgraded the pitch from T8F to #415, took a while to find a rear sprocket that fitted...

sorry can you clarify "leave all halls as they are". Do you mean put them back to how they were? Y->Y , B->B, G->G and then change phase till wheel turns the right way?

Ok, thanks for the info. When I say choke, I mean I increased throttle and the bike slowed down. I dunno if the threads are related, I'll let mods decide. I need to check amps as per other thread and see if I have good hall, then either this thread issue goes away or it doesn't. Not got...

Thanks for your input it really is appreciated. I know what you mean with Chinese prod-lines and inconsistency, drives you nuts at times! They also say any old crap just to sell it or be found in a search, I specifically bought a new throttle with volt-meter that was sold as 'half-twist', but...

Hi, Is there a maximum efficiency threshold of a BLDC motor before giving more juice lowers performance? I have a 1200w 48v 30A BLDC motor I am over-volting with 60v 33A. The acceleration is great and the torque is good but at top speed and on the 'high' speed setting, at the top end if I...

They weren't a set, but I get a feeling the motors are from the same production line. These Chinese VEVOR & KUNRAY BLDC motors look identical? "The motor doesn't have an amp rating like that. " well that's how they sell it 48v 4300RPM 42A 2000W. as 48v x 42A = 2,016W, that seems right don't...

Well, I got a 60v (71.2v) 25AH 50A-Continuos /100A-Max BMS battery and still the Vevor motor was running poorly. I'm not sure if the hall/phase changes the Chinese gave me to reverse motor was correct or if the fact the motor is 48v 42A and my controller though 60v is only 33A, even though the...