HDZero Rear-Mount Battery Case with SD Card Reader

Description The HDZero Rear-Mount Battery Case with SD Card Reader delivers intelligent, balanced power and seamless DVR offloading in one compact, rear-mounted solution for FPV goggles worldwide. Designed for universal 21700 cells, it features USB-C charging with continuous balancing, reverse polarity protection, and a built-in USB3.0 Micro SD reader, ensuring stable voltage, improved comfort, cleaner antenna alignment, and reliable performance for demanding pilots everywhere. 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. Specifications 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 Package 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