K4 Boost Battery Strap
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- for Quest 3/3S
- Extended Play: Keep the MR sessions going with 3 extra hours of battery life. Optimized for peak performance based on your gaming needs.
- Dual Fast Charging, Twice the Speed: Simultaneously charge the K4 Boost and your Quest 3S/3 with the DualBoost Power system. Fully recharge both in just 2.5 hours with a 45W adapter, delivering 25W power to your Quest 3S/3 while charging the internal battery.
- Comfort and Balance: Ergonomically designed rear headrest with thickened padding reduces facial pressure, while enhanced counterweight eases strain on your head and neck.
- Safe and Reliable: The premium-certified batteries and system are credited with multiple protections, including essential UL, EN, and FCC certifications. Every material is rigorously tested in TÜV labs for safety and durability.
- Easy Wear and Quick Adjustment: The 52° damping hinge allows easy on and off, while the quick adjustment knob ensures a perfect fit.
K4 Boost Battery Strap$55.99 View details |  |  K4 Comfort Strap$31.99 View details | |
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Product highlights |
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Weight |
358 g
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446 g
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234 g
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Hidden knob for laying down |
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Battery Capacity |
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Additional Battery Life |
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Charging Power |
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Dual charge HMD and Strap |
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Primary weight-bearing area |
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Cooling Pad |
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FAQ
If you have any other questions, feel free to contact our customer service team. We will do our best to assist you!
What’s the difference between the Halo(H4/H4 Boost) and Elite (K4/K4 Boost) head straps?
Halo Head Strap(H4/H4 Boost): Offers zero pressure on the face, focusing on comfort with light pressure on the forehead. It’s perfect for casual or moderate gaming and entertainment, though it may experience slight movement during more intense sessions.Elite Head Strap(K4/K4 Boost): Provides a bit more pressure on the face but offers greater stability, making it ideal for high-intensity games with more motion. It stays secure during active use, enhancing immersion.Both head straps are comfortable and lightweight, designed to enhance overall comfort and increase the VR/MR session. The choice between the Halo and Elite comes down to personal preference based on your specific needs.
How long will it take to get my orders?
It depends on where you are. Orders processed here will take 5-15 business days to arrive. Delivery details will be provided in your confirmation email.
Do your products come with a warranty?
All of our products come with a limited warranty. Please refer to the warranty policy for each product for specific terms and duration. If you encounter any product quality issues, please contact our customer support team.
Customer Reviews
Much more comfortable than the base head strap and a way longer playing time, just amazing
I've been using Kiwi head straps for years now. They didn't disappoint with the new K4 Boost. The recessed adjuster knob, the shortened charging cord, the ability to fast charge, and the continued padding are all great. The only thing I would like now is the ability to charge it like the SPC battery head strap with their dock. But maybe a new dock will come out soon anyway.
Feel free to use my promo code "BRIANSLOAN" for an extra 5% off your purchase.
I got about 3 extra hours of game time with this. The charge time as mentioned is really fast especially when you use the 45W charger made by Kiwi.
You can find my full review including unboxing, assembly, and review on my YouTube channel: https://youtu.be/CSlllmT9uJw
Fantastic product it extend your VR Gaming experience up to 4.5hrs in total. Very comfortable and very good balance in weight. Great for long gaming playtime. Game changer. Very Impressed with quality.
Great head strap, very comfortable and hardly any movement while playing. I have a big noggin and fits me well
Much better than I expected for the price,.
Very well made and comfortable,
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