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250w rated hubs have got me up hills ok , Ditchling Beacon is no mean feat for a non athletic rider and so got me up with out issue, even with my asthma. Coming down is even better , one can top 40/50 mph with no power but have to wary of washing out on the bends coming down on gravally bits.

For flat terrain with no big hills ,I can recommend the excellent Bafang G370 mini front hub an ideal trailer towing hub which is light and doesn't give any handling or steering effect. Rides without power without one noticing it until one looks at the display and can't see any readout ...

With bad knee's, the last you need is a Torque multiplier system so look at a geared hub bike. Why a mtb they are so yesterday, ok if you are a off roader but tbh don't see the appeal of them if only used for the road or a light trail.

Just a bunch of meaningless numbers , most likely a factory /producer S/N. Lets see a proper hub pic .

No , throttle is basically a thumb switch . On or off, basic speed control. Controller isn't programmed for power graduation via a thumb throttle only via PAS for which it is excellant.

My old bbs01 was 18a max, which almost tallied with the 630w read out.

With a hub motor the internal gearing is a factor , the higher the gearing reduction ration then the better it will ride with no power and on flat or slightly rising terrain if one has forgotten to take the bike out of PAS 0 then one will hardly notice . An advantage of a higher gearing...

Let us know when the UPP catches fire, it coul dbe the first time we have heard of a forum member battery fire.

Capacity varies a lot. Typically 18650 is approx. 3450mah for a 3500mah rated cell, where as a 21700 cell is 4200mah - 5000mah . My small ali bottle battery with 24 LG hg2 's is 44v/6000mah and weighs in at 1.436kg. My 21700 moli with 24 P42's is 44v/8400mah weighs in at 2.209kg. Indeed it is...

For me 18650 is still king for my small 44v bottle battery builds , one simply can't do it with 21700 format. Otherwise 21700 format is the one for general battery builds or the nice 18650 Sam 35e3 or Moli's. Molicell is the chosen cell selected by UK venture EVTL / Vertical aerospace for...

PAS 5 is insane on flat terrain, it really isn't needed . It jut eats up battery power so save it for the hills. Be careful with cable ties as they can pinch inner very thin wires and short them or break them. I use velcro strap on all my wiring.

One would say most are down to inappropriate/poor charging practices , using an incorrect charger voltage and also charge current to high and fast. Some batteries may almost immediately short and go hot others some time later when high current draw is used .

Wisper bikes if you want a legal twist and go with a V5 for proof, or a pedal first option throttle with the display setting set to zero start up & pedal first.

Great well done , if it works leave the magnet disc as it is (it is orientated correctly). Good that the Julet wiring matched up , it can be a bit pot luck as some vendors change the controller sequence of wiring to make you buy their more expensive replacements. It's the same old story, the...

It was a suggestion as a type with the same connector type , not a defacto it will work at any cost. One expects it would be 100% compatible with a KT set up but might not be with your set up as the wiring sequence may be different. Before you do anything simply connect it up and test it...

Yes should light up , it pulses red every time a magnet is sensed/passed by the sensor.

Typically one won't find a magnet disc other then 5, 8, 10 or 12 pole. RHS fitting then yes 00 - 03 are the usual values to select and for LHS 05 -07 . My Kt kicks in less then 1/4 rotationand is more like 1/8 th. One can have a throttle as long as it isn't a twist and go, if a pedal first...

Fot is a typo , try fit. Arrows faces C/W direction /direction of forward rotation. Arrows also align to outer face when fitted.

We will need to some clear pics of the controller wiring to see what you have got.

As the charger works ok with one battery and not so well with the other , then one can at least pindown the issue to the original battery. Issue now is , the original battery needs opening and checking for the charge fault. Areas to check; Charge port for burning /pitting. Both solder joints to...