HDZero Battery Case with SD Card Reader

The HDZero Battery Case is an intelligent, universal power supply solution for FPV goggles equipped with a standard 5.5 x 2.1 mm DC barrel connector input. The case is supplied without batteries and is designed for use with high-quality 21700 Li-Ion cells.

When equipped with two 21700 cells, the battery case offers extended runtime, USB-C charging functionality, automatic cell balancing, and a high-speed integrated microSD card reader for convenient DVR footage access. Integrated mounting clips on the back allow the case to be attached to the rear of the goggles, enhancing wearing comfort and balance.

Features

• Universal Support for 21700 Cells
  Compatible with any high-quality 21700 Li-Ion cells. Capacity and brand can be selected based on availability and preference. Supports both protected and unprotected 21700 cells.
• USB-C Charging with Integrated Balancer
  Can be charged using any USB-C cable—no separate LiPo charger required. The built-in electronics provide continuous cell balancing for long-term safety and performance.
• High-Speed MicroSD Card Reader
  A USB 3.0 microSD card reader is integrated directly into the battery case. DVR recordings can be transferred quickly at the end of the day—even during charging. Since the SD card is housed in the battery unit, it won’t be accidentally left behind in a computer.
• Reverse Polarity Protection
  If cells are inserted incorrectly, the battery case automatically disables the output voltage to protect your goggles and connected devices.
• Rear Mounting Clips for Improved Balance
  The case attaches to the rear strap of the goggles to counterbalance the front weight. This reduces forward tilting, improves wearing comfort, and ensures optimal antenna alignment.
• Reliable Power Supply
  Provides a more stable output than many USB-C power banks and ensures accurate voltage feedback to the goggles for precise low-voltage warnings.
• Compatible with All Major FPV Goggles
  Works with all headsets featuring a 5.5 x 2.1 mm DC barrel connector, 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 5V 3A
• Cell Balancing: Continuous internal balancing
• Safety: Reverse polarity protection
• MicroSD Card Reader: USB 3.0 high-speed (>90 MB/s)
• Power Output: 5.5 x 2.1 mm DC barrel connector
• Weight: Approx. 73 g (empty, depending on cells used)
• Mounting: Integrated clips for rear head strap
• Compatibility: All goggles with 5.5 x 2.1 mm DC input, including HDZero Goggle and BoxPro

Shipping Contents

• 1 x HDZero Battery Case (without batteries) with integrated USB 3.0 microSD card reader
• 1 x Integrated rear head strap mounting clips
• 1 x Goggle strap shortening clips