Perfect Compatibility: Length: 2.75 inchs (70mm), Diameter: 0.74 inchs (19mm), 2 pack weight:101g, Charging port: type-c. Designed for Streamlight Dual Fuel Perfectly compatible with Streamlight models including: Stinger 2020, ProTac HL 5-X USB, HL-X USB, PolyTac 90 X USB, Right Angle Light PolyTac X USB, ProTac 90 X USB, ProTac HL-X USB, ProTac HL USB Headlamp Siege X USB, ProTac 2L-X USB, Vantage 180 X USB, and more.WARNING: This is not a standard 18650 battery. Future Charging: USB-C High-Speed Fast Charging Port, Say goodbye to Micro-USB! Featuring a reversible-plug USB-C (Type-C) interface, it offers enhanced compatibility and more convenient, faster charging. Long-Lasting Endurance: 3200mAh High-Capacity Battery Provides extended illumination time, reduces charging frequency, and meets the demands of prolonged work or outdoor adventures. Comprehensive Protection: Intelligent Safety Safeguards Equipped with an advanced protection chip, it offers overcharge protection, over-discharge protection, short-circuit protection, overcurrent protection, overvoltage protection, and temperature protection. This ensures all-round safety for the battery and connected devices, with durability far exceeding similar products. Flexible Choice: Dual-Mode Charging Flexibility, Supports direct charging via USB-C cable (compatible with phone chargers, computers, car chargers, etc.) or charging via a dedicated dock charging slot (optional accessory), catering to diverse usage scenarios. Length: 2.75 inchs (70mm), Diameter: 0.74 inchs (19mm), 1 pack weight:48.9g, Charging port: type-c. Designed for Streamlight Dual Fuel Perfectly compatible with Streamlight models including: Stinger 2020, ProTac HL 5-X USB, HL-X USB, PolyTac 90 X USB, Right Angle Light PolyTac X USB, ProTac 90 X USB, ProTac HL-X USB, ProTac HL USB Headlamp Siege X USB, ProTac 2L-X USB, Vantage 180 X USB, and more.WARNING: This is not a standard 18650 battery.