This Tongsheng/SFM mid drive motor with torque sensor is the cheapest and good torque sensor mid drive motor in china, you can feel the power from your foot to start the ebike, so you don’t need use throttle to start the ebike TSDZ2B electric bicycle central mid motor with torque sensor Speed: 15Km/H-45Km/H top speed 45km/H. No brake lever(incompatible with sensor brakes) No thumb throttle(incompatible with thumb throttle). Special speed sensors, which are more robust, and include a split’Y’ adapter, to hook up a 6V 3W headlight, and 6V 3W taillight, which you can control from the display Supports up to 54.6V input voltage, this motor cannot works on 58.4V input voltage The motor have a freewheel and not for foot/coaster brake build coaster brake function —–it is means If you bike don’t have any brake lever, you must use the motor with coaster brake function, otherwise you can choose the motor have a freewheel. After installing the motor: If mechanical collisions happened between motor and frame, Add gaskets, We will send extra 1pcs 42351.0 and 2 pcs 42351.5 gaskets. If you do not add gaskets, It is easy crack the shell and destroy torque sensor. Speed sensor:Tighten with cable tie, Keeping distance between 10mm to 15mm, The arrow align at magnet. After installing Note: The motor does not work when the mid motor TSDZ2B is no-load; If the matching display’s model is XH18-LCD, rotating the throttle is only for Power assist shift. Do not tough the pedals when turing on the display power. You can choose below battery, which are compitable for the motor. HAILONG-MAX 48V 19.2AH Specification: (3A charger). 4P13S Li-ion 4.8Ah 21700 52pcs battery cells (the interior battery is SAMSUNG INR21700-48X 21700 Li-ion battery). HAILONG G70 48V 12.5AH Specification: (2A charger). 5P13S Li-ion 2.5Ah 65 pcs 18650 battery cells. Rated capacity: AH 2. Charging Voltage: 54.6V 4. Discharge cutoff voltage: 36.4V. Continuous discharge current: 30A 6. Pulse/Max discharge current 50A 7. Max charging current : 5A 8. Charging temperature: 045°C 9. Dischargeing temperature: -2055 °C 10. Operating voltage:36.4V54.6V 11. Diamesion: Please refer to the option picture for battery size 12. Weight of battery pack About kg. 120W/150W Lithium Ion Charger Specification Input Voltage: 100-240V/200-240V Output Voltage: 54.6V (for 13 series Lithium Ion battery use) Output Current: 2A/3A Charging Mode: CC-CV Intelligent Charger Super Powerful Charger 2A/3A Weight: 0.65KG/0.8KG. Must charge the battery to fully power at once after received parcel, Must charge the battery to fully power immediately when the battery out of power If this battery is to be stored for more than two months please charge for this for three hours every two months of storage and turn off the switch of battery. Do not connect the positive and negative terminals of battery Do not expose this battery to high temperature such as heating appliances or in direct sunlight Do not submerge this battery in liquid of any kind WARNING Disassemble only by the professionals Do store in a cool dry area out of direct sunlight Do not use any other charger for the one supplies with this battery When this battery is no longer of use please dispose of correctly by returning your supplier or recognized battery collection disposal point. Do not dispose of this battery with your household waste. There will have extra cost if your address is belong to remote areas. The return items must be in original conditions never used.