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 (not included) and provides long runtime, USB-C charging, automatic cell balancing, and a built-in high-speed Micro SD card reader for convenient DVR offloading. Note: This product ships without batteries to simplify international shipping. Check out all our FPV Goggles and our HDZero selection. 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 Model: HDZ2170 Battery Support: 2x 21700 Li-ion cells (not included) 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 Includes 1x HDZero Battery Case 2x Goggle strap shortening clips
