K4 Boost Battery Strap
- 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$69.99 詳細を表示 |  |  K4 Comfort Strap$39.99 詳細を表示 | |
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Compatibility |
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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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Customer Reviews
Quality is great, comfort also, battery in quest is at stable 99% level during games when connected to battery pack so it provides sufficient power output.
Strap is comfy but doesn't actually provide any power to the quest 3. Will notify me that the quest is charging but then instantly stop charging.
I have used the old Kiwi Headstrap with my Quest 2 for two years.
So this time, for the Quest 3, I ordered the K4 Boost Battery Headstrap, and it's even better.
The comfort level and battery are perfect, and the hidden control at the back looks neat and convenient.
If you do not already have a 45W charger, you must buy one to make the best use of the battery head strap.
So worth it. It’s not only comfortable but it’s a perfect price.
Really comfortable, especially compared to the strap that comes with the Quest, with the added bonus of a battery that also works pretty well.
