K4 Boost Batteriegurt
- für Quest 3/3S
- Verlängertes Spielen: Halten Sie Ihre MR-Sessions mit 3 zusätzlichen Stunden Akkulaufzeit am Laufen. Optimiert für Spitzenleistung basierend auf Ihren Gaming-Anforderungen.
- Duales Schnellladen, doppelte Geschwindigkeit: Laden Sie den K4 Boost und Ihr Quest 3S/3 gleichzeitig mit dem DualBoost Power-System. Laden Sie beide in nur 2,5 Stunden mit einem 45-W-Adapter vollständig auf und versorgen Sie Ihr Quest 3S/3 mit 25 W Leistung, während der interne Akku geladen wird.
- Komfort und Balance: Die ergonomisch geformte hintere Kopfstütze mit dicker Polsterung reduziert den Druck auf das Gesicht, während das verbesserte Gegengewicht die Belastung von Kopf und Nacken verringert.
- Sicher und zuverlässig: Die Premium-zertifizierten Batterien und Systeme verfügen über mehrere Schutzschichten, einschließlich der wichtigsten UL-, EN- und FCC-Zertifizierungen. Jedes Material wird in TÜV-Laboren streng auf Sicherheit und Haltbarkeit geprüft.
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Einfaches Tragen und schnelles Einstellen: Das 52°-Dämpfungsscharnier ermöglicht ein einfaches An- und Ausziehen, während der Schnellverstellknopf für eine perfekte Passform sorgt.
Fast, Free Shipping
Fast, Free Shipping
Enjoy free shipping on all orders over $20. Experience fast processing & reliable delivery, with your order arriving in just 3–7 business days across the U.S.
※For more details, please see our shipping policy.
30-Day Money-Back Guarantee
30-Day Money-Back Guarantee
Shop with confidence and enjoy our 30-day money-back guarantee. Simply return your undamaged products within 30 days for a full refund—no questions asked. Once your item reaches our KIWI warehouse, we’ll quickly process your refund.
※For more details, please see our refund policy.
Hassle-Free Warranty
Hassle-Free Warranty
Enjoy peace of mind with our 18 month warranty. If anything goes wrong, we’ll make it right—whether it’s a quick repair or a full replacement, you’re always covered.
※For full details, please refer to the warranty card or our warranty policy.
Lifetime Customer Support
Lifetime Customer Support
Count on us for the long run. Enjoy lifetime customer support from our expert team—ready to help whenever you need it.
※Reach out via email or live chat—we’re always here for you.
Pay with Ease
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Which Battery Head Strap is Right for You?
Zero face pressure and lightweight comfort—ideal for casual gaming and entertainment.
Stable, secure fit with extra support—built for intense, high-motion gaming.
Built on the stable, lightweight K4 Boost design—now with seamlessly integrated audio for total immersion.
449g
364g
459g
Yes
Yes
Yes
5300mAh / 20.4Wh
5300mAh / 20.4Wh
5300mAh / 20.4Wh
Up to 2.5 hrs
Up to 2.5 hrs
Up to 2.5 hrs
Up to 45W
Up to 45W
Up to 45W
HMD + Strap
HMD + Strap
HMD + Strap
Forehead
Face
Face
Yes
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—
—
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On-ear headphones, high-quality spatial audio
Let’s Answer Your Questions
Is this head strap better than the original one on the Quest 3/3S?
The original strap is lightweight and great for casual use, but the K4 Boost takes comfort and performance to the next level. It adds up to 2-2.5 extra hours of battery life, fast-charges both the headset and strap, and offers better weight balance with zero facial pressure. If you play for long sessions, it’s a solid upgrade.
What’s the difference between this strap and the H4 Boost?
The K4 Boost is designed for high-intensity movement and active gameplay, while still delivering excellent battery life. In contrast, the H4 Boost prioritizes comfort and extended playtime — making it ideal for relaxed gaming, movies, or work.
Will the extra head strap feel heavy?
Not at all. It’s built with industry-leading weight control and a balanced design that actually feels more comfortable than the original strap — even during long sessions.
Is the battery safe?
Yes, absolutely. We use high-grade lithium batteries that pass strict safety tests from the start. Plus, the product comes with an 18–24 month warranty or replacement policy, depending on your region.
Where can I find the user guide and warranty manual for the K4 Duo head strap?
You can download both the User Manual and Warranty Guide from our official support page. Just scroll to the “Battery Strap for Quest 3/3S (KW-QS02B-SPF)” section to find the PDF files.