Home > Products > E-bike & Motorcylce Batteries > MATE-SF-I Seat tube Style Silver Fish Style 36V17.5Ah E-bike Lithium ion Battery
Model No.: MATE-SF-I
Style: Seat Tube
Nominal Voltage: 36V
Nominal Capacity: 17.5Ah
Cells: 18650-3.5Ah 3.7V
Configuration: 10S5P
BMS: Standard
Dimensions: 390*110*78 (mm)
Production Desciption
Main Features:
1. High Safety and Reliability: EV A+ Grade 18650 cells(3.6V3500mAh)
2. High Energy Density. Big capacity with small space.
3. Long Cycle Life: 500 times of 0.5C charge&discharge, 100%DOD, the remaining capacity is 80%+ of initial Capacity.
4. Water-proof Design: We adopt water-proof technology to satisfy the use in the rainy or humid weather.
5. With a USB Charge port to support charging Mobile Phone etc.
6. Smart BMS is optional.: Allows the riders to monitor battery status including SOC, voltage, current, temperature, cycle life etc through an smart phone APP.
7. GPS function is optional. People can locate their bikes through a smart phone APP.
Specification
| No. | Items | Specifications |
| 1 | Nominal Voltage | 36V |
| 2 | Nominal Capacity | 17.5Ah |
| 3 | Cell inside | 18650-3.5Ah 3.7V |
| 4 | Configuration | 10S5P |
| 5 | Standard Charge Current | 3.5A (0.2C) |
| 6 | Max. Charge Current | 17.5A (1C) |
| 7 | Protected Circuit Board (BMS) | Standard BMS |
| 8 | Continuous Discharge Current | 20A |
| 9 | Peak Discharge Current | 60A |
| 10 | Full Charged Voltage | 42V (4.2V per cell) |
| 11 | Charge Cut-off Voltage | 42.5V (4.25V per cell) |
| 12 | Discharge Cut-off Voltage | 35V (2.5V per cell) |
| 13 | Battery Net Weight | 3.5kg approx. |
| 14 | Battery Dimension | 367.4*90.3*89.5(mm) |
| 15 | Charging/Discharging | DC connector |
| A pair of wire | ||
| 16 | Operating Temperature | Charging: 0°C ~ 45°C Discharging: -20°C ~ 55°C |
| 17 | Storage Temperature | (Recommended to store 20 ± 5°C for long term storage) |
| 18 | Life Cycle | >800 times (80% of initial capacity at 0.2C rate, IEC Standard) |
Details Photos:

Other Options
| Model No. | Cell Type | Size(mm) | Max. Cell(pcs) | Max. Capacity |
| MATE-SF-I | 18650 | 390*110*78 | 65 | 36V17.5Ah |
| MATE-SF-II | 18650/21700 | Bigger Size | 100 | 36V25Ah 48V20Ah |
ODM/OEM Customized Solution

Customized solutions:
To meet the differentiated needs of various electric bicycle customers, we have developed three exclusive solutions covering the entire service chain from design to after-sales maintenance:
1. Whole vehicle integration solution
Problem-solving: For electric bicycle manufacturers, we provide battery packs that precisely match the seat tubes of the models, optimize the installation structure of the battery and the frame, ensuring a secure installation and convenient disassembly; customize BMS parameters, match the vehicle controller, and achieve efficient coordination between the battery and the motor, enhancing the power performance and range of the entire vehicle.
Value-added services: Assist customers in completing EMC electromagnetic compatibility tests for batteries and the entire vehicle, provide technical support for UL, CE, UN38.3, etc. certifications, and shorten the product launch cycle.
2. Modified market solution
Problem-solving: For electric bicycle modification merchants, we provide universal seat tube battery packs that are compatible with most standard seat tube sizes; provide accessories such as installation brackets and wiring harnesses to simplify the modification process; support customization of fast charging functions to meet the quick charging needs of modification users.
Value-added services: Provide battery installation tutorials and technical guidance, offer 7×24-hour remote fault diagnosis after-sales service to ensure the stable operation of modified products.
3. Overseas market exclusive solution
Problem-solving: For overseas market customers in Europe, Australia, etc., we provide battery products that comply with local certification standards, compatible with the regulations for motors below 250W in the region; customize multilingual power display functions to meet the usage needs of users in different regions; optimize battery packaging to meet cross-border transportation standards and reduce transportation risks.
Value-added services: Assist customers in handling customs clearance procedures, provide MSDS, RoHS, etc. related certification documents to facilitate the product's smooth entry into the overseas market.
Factory strength guarantee: Choosing us means choosing stability and trust
1. R&D strength: The company has a professional electric bicycle battery R&D team, focusing on core technologies such as cell selection, BMS algorithm optimization, and battery structure design, with product performance indicators at the industry-leading level.
2. Production strength: Fully automated production lines are equipped with online high-precision detection equipment, screening 100% of key parameters such as voltage, internal resistance, capacity, and cycle life of the battery to ensure that the deviation of battery consistency at the factory is ≤2%; support small batch trial production and large-scale supply, with stable and controllable delivery schedules.
3. Quality control and certification: Certified by ISO9001 quality management system and ISO14001 environmental management system; products comply with international certification standards such as CE, UL, UN38.3, RoHS, etc., and undergo multiple rigorous tests such as drop, vibration, and high-low temperature cycling before leaving the factory, with a pass rate of 100%.
4. Service strength: Provide one-on-one customer managers + technical engineers' connection services; support free sample testing, optimize the solution based on test data; offer lifetime technical consultation after sales, responding within 48 hours to product quality issues to ensure your production progress is not affected.
Why Choose MateLion
Choosing MateLion means you chose a reliable mate to support your business with market-proved high-quality lithium ion batteries, advanced assembly technology and worry-free after-sale service. As a professional manufacturer for years, MateLion's capability covers providing professional lithium ion batteries to E-bike, E-motor cycle, EV, LEV, HEV, AGV, RV, VAN, Marine, Solar System, Golf Carts, Off-grid System etc.
MateLion is skilled in customizing batteries exactly according to your requirements with ODM/OEM service to help you market your own brand!