Definitely not do this you need a lithium battery charger as these are Smart chargers and regulate the trickle charge into the battery through a BMS board.
Find out what voltage your battery is
ie:-36v and if so you need a battery charger higher normally 42v but it's gotta be over the 36v but not exeptionally higher so usually it's 42v and that will be ...
I had a similar problem with a motor broken during shipment (luckily the manufacturer sent me a new one). I tried to fix the broken one by replacing the cable, but it's quite hard to do, because the space inside the housing is quite small, and when I tested the motor it worked for a while until the housing, by rubbing the cable, shortened the sensor cable, ...
Id check out all the connections firstlt then id check for any breaks in the wiring as with it being a foldup bike ive heard of the wiring being caught/streched when folding down etc it could be a simple cause as this if not it almost definitley looks like a failing on the throttle mechanism to me
Whilst I appreciate you prefer to use bicycle parts, you may find it beneficial to search for scooter or wheelbarrow hub motor/wheel. The benefits of which would be - they're water tight, they're simple (a nut to hold the axle at either side is all you need to secure it) and they have lots of tread.
You can also run it using a motor ...
Depends how the limiter works. If it knows about RPM of the motor/wheel then the increase in diameter will effectively raise the top speed.
Example - if the motor's limiter is at 18 mph on the 20" wheel, then that's
63 inches circumference.
18 mph is 19008 inches/minute.
That works out at 301 RPM on the motor.
So reverse that, 301 RPM on a 29" ...
Assuming you have eliminated contamination of pads or rotor as the cause you can consider a different calliper.
The bike spec on the website lists the brake spec as “Mechanical disc with alloy 3 finger levers.”
A drop in replacement might be an Avid BB7 or BB5 or Shimano BR-M375 calliper which might improve the strength of the brake without needing to figure ...
It's going to depend on several things:
The type of pedal-assist detection
How good you are with electronics
Whether you can get a full kit for that model
If you can't get a suitable kit, you either need to be good at electronics (design and assembly), or pay someone who is.
I've sketched out a design in the past (on paper - I don't have ...