https://www.aliexpress.com/store/product/AWT-18650-Battery-3000mAh-50A-Rechargeable-Battery-3-7V-Li-ion-Battery-for-Wismec-Reuleaux-RX200S/3135023_32857613794.html?spm=2114.12010612.8148356.11.34a85933cbjMfp Specifications of li-ion rechargeable battery: 1. Rated Capacity: 3000mAh 2. Continuous Discharge Current: 35A 3. Max. Short Peak Discharge CC: 50A 4. Rated Voltage: 3.7V 5. Internal Resistance: ≤60mΩ 6. Cut-off Discharge Voltage: 2.75V 7. Charge Upper Limit Voltage: 4.20±0.05V 8. Charging Metod: CC/CV 4.20V 9. Charging Time(Std): 4.0hours 10. Standard Charging Circuit: 0.2C A 11. Charging Circuit: 0.5C A 12. Standard Discharging Circuit: 0.2C A 13. Fast Discharging Current: 0.5C A 14. Max Discharging Current: 2C A 15. Weight: about 54g 16. Size: 18*65mm 17. Version: Flat Top 18. Color: Rainbow 19. Operational Temperature: Charge (0 ~ 45°C) Discharge (-20 ~ 60°C) 20. Storage Temperature: Within 1 month (-20~ 50°C) Within 3 months (-20~ 40°C) Within 6 months (-20~ 20°C) 21. Usage for example: SMOK: Alien 220W Kit, ProColor 225W Kit, Mag Kit, AL85 Kit etc. Eleaf: iStick Pico 75W Kit, iStick Pico 25 Kit, iKonn 220 etc. Kangertech: Subbox Mini Kit, Dripbox etc. Joyetech: EVic Primo Mini Kit, eVic VTC Mini Mod, CUBOID 200 TC Box Mod etc. Wismec: Sinuous P80 Box Mod, Reuleaux RX200S, Reuleaux RX300, Reuleaux RX2/3 etc. Ijoy: Captain PD1865 etc. Vapor Storm: V80 TC Mod etc. Tesla: Invader 3, Nano mod etc. Sigelei: Fuchai 213 etc. Innokin: iTaste Kroma Kit etc. Smoant: Battlestar 200W TC Box Mod, 218 Box Mod etc. And other Electronic Cigarette need 18650 battery.