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The display may not be determining whether the battery is a36v one or 48v one as the battery full charge voltage isn't correct. The batteries should be reading in real time figures 41.5v - 42v when fully charged for a 36v one. So they are likely unbalanced or have another fault. For now...

The only dedicated charging port batteries via the discharge port are the same port BMS , they only have two wires from the BMS and not three. Several have followed utube or fakebook advice to wake up a battery or charge through the discharge port when their battery refuses to charge via the...

The battery shouldn't work at all if #4 is 0v as this cell bank is dead , the BMS should be sensing a fault and refusing to switch to allowing a charge. Also #1 & #3 are quite low so should trigger lvc much sooner. I for one would be very cautious of this pack and certainly wouldn't continue...

It's is simple , the brands with closed systems don't want you to repair /fix yourbike, let alone diagnose the fault. There is no money in it for them, that is reason enough.

This 4 piston brake set has integrated sensors, if the three pin julet type connection isn't wired correctly it come with an adpater to sm 2. The sm2 connection would be compatible with sm capable controllers . 4-piston Electric Bike Hydraulic Disc Brake Kits Front and rear hydraulic disc...

You may have to carefully cut that wrapping to access it, it looks like you have 11 wire inputs . The first should be B0/B- then the other ten are all B+ so B1 thru to B10, set the meter dc dial to 20v. A pair of sewing needles or hem pins come in handy to poke in the pins outs on the wire...

Muduard set up is aweful and tbh they aren't going to protect much of anything from wet or mud inc the rider. For any guard protection the close the fit to the tyre the better unless mud plugging in which case none or minimalist is best. Rear rack is way to high to be of practical use , one is...

I suggested opening th battery to read the ten cell groups to see if their is a fault but mostly agree that due to the battery age recycling is most likely better. In the short term though Chris can learn some new skills by opening and learning how to check cell group measurements .

Thinner oil is better as the chain won't end up as treacle and collecting all manner of gunk . When I oil my chains I wipe them after with a rag to remove excess so no spatter occurs.

We don't know the status of the ten cell groups so knowing the ten singular voltages may help. We know to a degree the battery will charge to a point so all cellgroups are above LVC, though we don't know if one is weak or one is high.

The more the brands that use Canbus /handshaking with EAPC's , then the sooner they will end up as scrap or landfill.

Likely needs recycling then, but we can guide you in to taking ten cell group readings. First though you need to open the case to get to the cell pack. Once opened one needs to find the BMS and the multi pin sense wire connector and take a pic of it for us.

Tell us the bike make !!! Most likely some handshaking going on between battery / controller might be Canbus. Thin red or blue likely voltage , black v- ? Yellow comms ?

No you simply buy a new controller each time you blow the mosfets.

How old is the battery ?

There obviously isn't a very low cell group otherwise it woudn't try and charge at all, the possibility is that there is a dead cell or two in one of the parallel groups or the BMS is faulty. An outside chnace is a broken sense wire. What ever the fault the battery needs opening and some...

Can you elaborate on the above, was the battery left on the charger at 39v or was it charged to 39v then disconnected and the bike stored ?

Do Wisper batteries have a sleep mode ? David @Wisper can give you the answer on that one.

Yes. Plug the charger in the wall socket and switch it on, then simply check the out put voltage .

Have you physically checked your charger output is 42v ?