The HDZero Rear-Mount Battery Case is a smart, universal power solution for FPV goggles that use a standard 5.5 x 2.1 mm DC barrel input. This case is designed to accommodate any high-quality 21700 Li-ion cells, and provides long runtime, USB-C charging, automatic cell balancing, and a built-in high-speed Micro SD card reader for convenient DVR offloading. This bundle includes the HDZero Battery Case and two INR21700-50G Li-Ion Batteries Check out everything HDZero and our entire selection of Li-Ion cells and chargers! Features Universal 21700 cell support USB-C charging with built-in balancer High-speed micro SD card reader Reverse polarity protection Rear-mount strap clips for better balance Compatible with all major FPV goggles Specifications HDZERO REAR-MOUNT BATTERY CASE Model: HDZ2170 Battery Support: 2x 21700 Li-ion cells Voltage: 6.0 to 8.4 V (2S1P) Charging: USB-C 5V3A Cell Balancing: Continuous internal balancing Safety: Reverse polarity protection Micro SD Reader: USB3.0 high speed (>90 MB/s) Power Output: 5.5 x 2.1 mm DC barrel plug Weight: ~ 73 g empty Mounting: Integrated rear head-strap clips Compatibility: Any goggle with 5.5 x 2.1 mm DC barrel input including HDZero Goggle and BoxPro INR21700-50G 4900mAh LITHIUM-ION BATTERY Model: INR21700-50G Type: Lithium-ion Rechargeable Cell Nominal Capacity: 4900mAh (Standard Discharge at 0.2C) Rated Capacity: 4750mAh (Discharge at 1C) Nominal Voltage: 3.63V Charging Voltage: 4.2V Charging Method: CC-CV (Constant Current with Limited Voltage) Standard Charge Current: 0.5C (2450mA) Max. Charge Current: 1C (4900mA) Max. Discharge Current: Continuous: 9.8A (2C), Pulse: 14.7A (3C, not continuous) Discharge Cut-off Voltage: 2.5V Cell Weight: Maximum 72.5g Cell Diameter: 21.5mm Cell Length: 70.85mm Operating Temperature: Charging: 0°C to 45°C Discharging: -20°C to 60°C Includes HDZero Rear-Mount Battery Case 1x HDZero Battery Case 2x Goggle strap shortening clips INR21700-50G 4900mAh Lithium-Ion Battery 2x INR21700-50G 4900mAh Lithium-Ion Battery
