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How have you looked after/charged the battery ? Do you charge to full all the time and let it sit all the time at 42v?

Only viable if it was quite a new battery, then as above you need the knowledge and capable equipment to carry out a good lasting repair.

It's not economical on an old failing battery. A good capable spot welder is about £130 and then needs a £40 or £50 lipo battery to power it, add on the price of cells about £3 - £5 each, nickle strip and a few other bits . The cost starts mounting up to that of a new battery or simply send it...

Right your battery has had it then, the cells will have high to very high internal resistance which is assign of ageing and is detrimental to cell capacity. It is time to send the battery to a recycling centre or possibly use them for a torch.

Deere John, have you got a link for that voltage meter/display ? Looks good and is simple 2 dc out and dc in lines. I have a similar one on my swizzbee mounted in a small project box but the wiring is more fiddly and utilise 6 wires for both voltage/amperage and all the other readings.

Eddie is hard core nothing he likes better then freezing his nuts off in a wet mud bath.

The tdsz is 48v so a 13s battery will be fine .

You need to stand back and think of your actual requirements a lot more before jumping in feet first. A few Q,s. How will any battery be carried on the bike ? How far do you want to ride in a day ? Show us a pic of the bike ? How much ascent in meter's or feet do you think you will climb in a...

Gooday or should that be Ciao !!! Pull up a chair or couch and tell us your many troubles and lets see if we can help, our hourly charges are very cheap :D.

The risk is you may possibly cause damage to the controller, the sp+ contact could just be a quick touch/dry contact to test then if it works solder it .

The load required is theoretical power load by means of amps drawn and not a physical weight load. Putting a load on means making the electrical system work harder, the battery is the power source (the weak link), the controller is what provides the load by means of powering the hub. By gently...

That will be one v.large (98 cell) weighty battery (about 10.5 - 11lbs), you will need a rear rack with good flat area to carry it. I don't understand the logic of 25r for a low powered set up, 25r 25a rated so 175a rated pack, over kill for a mid drive that pulls about 15a max. LG Mj1 or M36...

Probably just needs a new 9v battery.

Ok now you need to create some load and demand the battery to output some power, so whilst using the throttle gently use the brake so that the wheel still turns. This will draw higher amps from the controller which will demand the battery to work harder, see what the voltage does.

They are illegal in UK and most of the EU, the fact they will be marked as so is all that matters and not what can or can't be done by software. The 250w 48v model will still output nearly 600w through the drive in highest assist mode.

Both kits come complete with cranks and chain ring. I have had two failures with my BBS and now no longer a fan of them , I would possibly opt for the TDSZ or currently leaning towards getting a AKM 48v mid drive in the future if elected to get another.

With an exact replacement motor you don't need to rebuild the rim, all you would do is swap over the internals in to the cleaned existing hub. On that hub you would have to factor in duties/vat & handling fees so about £25 on top of the price.

Kirstin shame on you tire ? Surely tyre . Yes surprising how all works wonderfully then when you make a change it never settles back the same, maybe a bot of lube ?

As there is no spare connector it is likely the controller may not be configured/programmed to accept one. You could take a risk and try and add one but doubt it will work, the gnd & 5v will be easy to identify and try to solder however there may not be a place on the pcb for the signal wire...

You have nothing to loose by stripping it down because as it is, it is next t useless. If it goes pear shaped then new hubs are quite cheap to buy.