HDZero Rear-Mount Battery Case with SD Card Reader (HDZ2170) The International HDZero 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 version ships without batteries to simplify international shipping and allow you to use any high quality 21700 Li-ion cells available in your region. Once equipped with two 21700 cells, the Battery Case provides long runtime, USB-C charging, automatic cell balancing, and a built-in high speed Micro SD card reader for convenient DVR offloading. Integrated rear-strap clips allow the pack to mount at the back of your goggles for improved comfort and balance. Features Universal 21700 Cell Support: Install any reputable 21700 Li-ion cells. Choose the capacity and brand that work best in your country. Supports standard protected or unprotected 21700 cells. USB-C Charging with Built-In Balancer: Charge the pack using any USB-C cable. No LiPo charger required. Internal electronics continuously balance the cells for long term safety and performance. High Speed Micro SD Card Reader: Includes a USB3.0 Micro SD card reader built into the battery housing. Offload DVR footage quickly at the end of the day while the battery charges. Because the SD card travels with the battery, it is difficult to forget in your computer. Reverse Polarity Protection: If the cells are installed backward, the Battery Case automatically disables output to protect your goggles and connected devices. Rear-Mount Strap Clips for Better Balance: Mounts to the rear of your goggle head strap to counterbalance the weight of the goggles. Reduces forward tilt, improves comfort, and maintains ideal antenna orientation. Reliable Power Delivery: More stable output than many USB-C power banks and correctly reports voltage to the goggles for accurate low voltage alarms. Compatible with All Major FPV Goggles: Works with any headset that uses a 5.5 x 2.1 mm DC barrel jack, including HDZero, Walksnail, Skyzone, Orqa, and others. Specification Model: HDZ2170 Battery Support: 2x 21700 Li-ion cells (user supplied) 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: Approx. 73 g empty (depends on cell choice) 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 HDZero Battery Case (Global version, no batteries) Built-in USB3.0 Micro SD card reader Integrated rear-strap mounting clips Goggle strap shortening clips
