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Vive Cosmos controllers take 2 batteries, and last 2 hours of active play (according to HTC) : r/SteamVR
![Amazon.com: HTC Vive Wireless Adapter -PC (Powerbank for Wireless Adapter) It can only be Delivered to The United States : Cell Phones & Accessories Amazon.com: HTC Vive Wireless Adapter -PC (Powerbank for Wireless Adapter) It can only be Delivered to The United States : Cell Phones & Accessories](https://m.media-amazon.com/images/I/41Pj+NHMUzL._AC_UF894,1000_QL80_.jpg)
Amazon.com: HTC Vive Wireless Adapter -PC (Powerbank for Wireless Adapter) It can only be Delivered to The United States : Cell Phones & Accessories
![HTC VIVE Wireless Adapter Full Pack - Virtual reality headset wireless adapter - for VIVE Cosmos | Dell USA HTC VIVE Wireless Adapter Full Pack - Virtual reality headset wireless adapter - for VIVE Cosmos | Dell USA](https://snpi.dell.com/snp/images/products/large/en-us~AB363646/AB363646.jpg)