Head strap for Google Kiwi design H4 Boost battery module — replacement accessory

Replacement head strap designed for the Google Kiwi design H4 Boost battery module provides a secure, adjustable fit to hold the H4 Boost battery in place during use. Intended as an accessory for devices that accept the Kiwi H4 Boost battery module, it ensures stable positioning and hands-free operation while improving comfort and balance during extended sessions. The strap integrates a built-in battery compartment and ergonomic shaping to distribute weight away from the face, and includes features aimed at temperature management and convenient adjustment.

Advantages

The head strap combines an ergonomic shape with an integrated battery solution to extend operating time and reduce facial pressure. It supports faster charging and dual charging of the headset and strap, while built-in protection measures and fire-resistant materials increase safety during use. The strap is balanced for longer wear, includes a cooling design to improve airflow at contact points, and provides field-of-view adjustment for more precise headset positioning.

Suitable for

• Users of Meta Quest 3 / 3s seeking extended battery life and improved balance
• VR sessions that require hands-free, stable headset positioning for gaming or simulation
• Applications where quick charging and simultaneous charging of headset and strap are useful
• Users who need adjustable field of view and customizable fit for comfort

Key specifications

• Battery capacity: 5300 mAh / 20.4 Wh
• Operating time: approximately 2–2.5 hours (depending on headset and usage)
• Maximum charging power: up to 25 W
• Dual charging capability: supports simultaneous charging of headset and strap
• Weight: 446 g
• Primary mounting/charging area: forehead region
• Built-in cooling/ventilation to improve airflow
• Adjustment controls: slider and wheel for field-of-view and fit tuning
• Construction: reinforced materials with multi-layer protection and low-resistance components

How to use

Attach the replacement head strap to the compatible headset according to the headset manufacturer's alignment points, ensuring the forehead charging area is seated correctly. Adjust the rear strap and use the slider and wheel to set the field of view and tension until the headset is comfortable and balanced. Connect the charging cable to the strap or headset as needed; the strap supports dual charging so you can charge both units simultaneously. Follow any device-specific instructions for pairing the battery module and verify that the strap is securely fastened before use.

Usage recommendations

Charge the strap using a compatible 25 W (or higher) USB Power Delivery source to achieve faster charge times, and avoid exposing the unit to extreme temperatures or moisture. For prolonged sessions, ensure the strap fit is balanced to minimize facial pressure and allow ventilation around contact points. Inspect connectors and fastenings regularly and follow the headset and accessory safety guidelines when swapping or replacing the battery module.