HDZero Rear-Mount Battery Case with Batteries
by HDZero

The HDZero Rear-Mount Battery Case Bundle is an advanced, universal power and data ecosystem engineered to change how FPV pilots power their headsets. Built to accommodate two high-capacity 21700 cells, this smart 2S power pack features built-in USB-C balance charging, completely eliminating the need to haul a bulky LiPo balance charger into the field. Its most innovative addition is an integrated, high-speed USB 3.0 MicroSD card reader built right into the battery housing, allowing pilots to easily offload high-definition DVR footage to a laptop at the end of a flight session while the battery simultaneously tops itself off.

Designed with ergonomics in mind, the case features integrated clips that snap securely onto the rear of almost any standard FPV goggle head-strap. By placing the battery pack at the back of the head, it acts as a perfect physical counterbalance to heavy digital or box goggles, dramatically reducing forward face-sag, face-plate foam pressure, and neck strain. Additionally, keeping the battery pack stable on the rear strap ensures that your patch and omni antennas remain properly oriented toward your aircraft during close-proximity and long-range flights.

Key Features

• Extended Flight Runtimes: Utilizing two premium 21700 cells delivers a robust 2S1P pack with up to 5000mAh of energy, powering digital goggles for roughly 2.5 to 3 hours and analog setups for up to 3.5 hours.

• Onboard USB-C Balance Charging: Internal smart circuitry automatically handles cell balancing and voltage regulation over any standard USB-C connection, maximizing cell longevity and flight safety.

• Integrated USB 3.0 Media Hub: Built-in MicroSD reader pushes transfer speeds past 90 MB/s. Because your flight DVR card stays seated in the battery pack, you will never accidentally leave your media card behind in your computer or at the workbench.

• Hardware Failure Prevention: Outfitted with robust reverse polarity protection. If the lithium cells are accidentally inserted backward during a field swap, the internal circuitry immediately cuts output to safeguard your expensive FPV goggles.

• Universal Goggle Integration: Outputs clean, reliable power through a standard 5.5 x 2.1 mm DC barrel jack, reporting raw voltage data directly to the goggle's operating system for highly accurate low-voltage telemetry alarms.

Specifications

• Model / SKU: HDZ2170

• Supported Batteries: 2x 21700 Li-ion cells (Included in this Bundle)

• Configuration: 2S1P (Nominal 7.4V / Peak 8.4V)

• Output Voltage Range: 6.0V to 8.4V

• Power Output Interface: 5.5 x 2.1 mm DC barrel plug

• Charging Interface: USB-C (Supports 5V / 3A inputs)

• Cell Balancing: Continuous, automated internal cell balancing

• Safety Protections: Reverse polarity protection and over-current cutoff

• MicroSD Reader Interface: USB 3.0 High-Speed (>90 MB/s transfer rate)

• Weight: ~73g empty / ~212g with 21700 cells installed

• Mounting Mechanism: Integrated rear head-strap clips

• Headset Compatibility: Any FPV goggle utilizing a 5.5 x 2.1 mm DC input (HDZero Goggles, BoxPro, Walksnail Avatar X, Skyzone, Fat Shark, Orqa)

What is Included

• 1x HDZero Smart Battery Case with Integrated MicroSD Reader

• 2x Premium 21700 Lithium-Ion Battery Cells

• 2x Goggle Strap Shortening / Adjustment Clips