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Have dropped the price on this to £100 if anyone interested. Think LiPo4 battpack a good potential upgrade because it would work with existing motor controller & perhaps chargers? A high C rate for the 36A start amps at stall ideal, Think 20A is an absolute max when moving say up a very steep...

I put an ammeter on the bike, 36A momentry starting from stall, commonly around 20A & 2A if the wheel is running off the ground. So this agrees with the 40A BMS if up grading the motor Motor is a Parvalux EMD 50 - 446B TGA Part 3110 039, I checked if available in case it ever failed, I have not...

Have for sale a TGA 24 v Crank Drive 20 inch bike, all working OK, with spare & original charger. Has SLA batt system. Drives through Sturmey 3 speed rear wheel. Works fine as is or could be basis for say hub motor crank drive project. Some rust on rims but comes with spare donor wheels with...

I remembered that Bafang used to offer a range of windings & gearings to suit different rim dia.s - the slowest - aimed at 26'' off road MTB users may be an idea in a 700 wheel. Do not buy this from BMSbatt - as it is pot luck which version they send. A smaller option is OutRider - was Tongxin...

I built a batt from LiFePo4 pouch cells from BMSbattery some years ago - using their BMS. It is Ok when working, but I lost one cell due to 'puffing' - I could never work out why. I replaced this with a similar cell from AliExpress (cost £15 with shipping, replacement single cell from BMSbatt...

I went the other way & built a 201 rpm Q100 into a 24'' rear wheel, keeping the frame & front wheel as a basic 26'' ATB style. The motor draws 15A max @ nominal 36V . This gives a decent hill assist without too much sacrifice of speed. The saddle is only 1'' nearer the ground, I weigh 200Lb...

I am only now an occasional rider thanks to other commitments. I remember researching Li-ion calendar life vs Li Po4 - At the time you needed to be on the bike 4 days a week to use up the 2000 cycles in 10 yr calendar life of LiPo4, & 3 days a week over 5 yrs for the 800 cycles of Li- ion...

To be honest I was more wondering what motor it used - probably a gear one owing to the small dia of the rims. I guess from my own measurements of motors that it does not draw a lot more than 200 w once up to speed on the flat - at least at 15 mph or less. Above that wind resistance becomes more...

Saw these 'fat tyre scooters' on Alibaba https://www.alibaba.com/product-detail/Fat-Tire-EEC-COC-CE-1000W_62136904805.html?spm=a2700.7735675.normalList.17.ZkLARB&s=p It claims up to 50 kmh, climb angle of 25 / 30 degrees, all are 60v, 12 or 20 Ah batt. Some have lights / indicators & claim an...

I have a 408 from about 2007, & a 408 clone from 2005, (Golden Island HBM 36) - Both direct motors laced into 20'' Front wheels. The HBM 36 is now running on a self learning sensored 15A @ nom 36v. Some years ago I was told by E crazyman (supplier of controllers on ebay) that this motor could...

Thanks again all, for the advice. Not sure who to go with on the spokes as bms would work out rather cheaper. Interestingly the spokes do not add to the shipping costs! I did once try to interest them in the Chengzhou to Lodz (Poland) express goods train - ideal for batteries

Thanks NJS & all, I am a bit doubtful in that I cannot tell how the nipples supplied by bms will sit in the rim holes - need this for the ERD (have the double wall rim on its way). Is the 12g & 1X pattern practical? I am pretty sure I have seen one of these done 1X on here or ES. Agree windows...

Does anyone have a drawing for the above motor, what I need is the flange dia (spoke hole centre to centre across the flange), the flange width, & the offset info for a rear wheel, as here https://leonard.io/edd/howtomeasure I hope to get the spokes from bmsbatt at the same time as the...

PSB America - on freesat showed ;In Search of the Better Battery, these things often are repeated - or it might be somewhere on the net. Showed various Li cells, how they are made & common causes of failure, also various promising chemistries under development. One thing they did not mention is...

So the first just ceases all pack charging on any one cell reaching hvc if I understand correctly, & likewise discharging if any one cell reaches lvc, it seems pretty pointless not to let the other 'laggard' cells catch up & equalize them! I do not really understand why it even exists. Do both...

Can anyone tell me the difference between these BMS, first one says no balance, but lists cell max & min voltages etc, seems to do all it should...

Thanks for the kind offer, but two things, I was completely unaware of Vruzend, only had time for a brief look yet, seems a great new idea, will study carefully. The 128H project - well I would be offering my time free but feel the end user must stand parts cost, if the thing should go ahead. He...

The cell is £10.78, Shipping is £ 27.24 so £38.02 in total (without any UK customs charges). If I do get a Q128 as well for the other project then the cell adds no more shipping cost to the motor order. On the other side of the coin the remaining cells are several years old but low cycles. The...

I seem to remember problems surfaced with the two speed motor, would you recommend this above the two speed & indeed is it a step up from the good Q100H. I value simple and reliable above gimmicks, & like a throttle so could I team it with a Con91. Afraid it is a case of limited money for the...

Hi, Looking for above cell in UK / Europe to repair pack. Only $14 from Bmsbatteries but shipping a killer. open to other idea such as can I substitute another cell same chemistry & roughly same Ah on BMS common to both. Otherwise am thinking as last resort to get 8s BMS 24v nom, rescuing some...