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During a search operation on Saturday, the BSF personnel recovered a China-made quadcopter along with a hold and release mechanism from the field, said the official.
Earlier today, Ukrainian forces from the 10th Mountain Brigade released a video of a quadcopter dropping a K-51 CS gas grenade into a Russian position.
Source: https://www.fark.com/comments/12750964?utm_source=feed&utm_medium=comments&utm_campaign=fark
The quadcopter would have to frequently land to recharge.
Source: http://www.strategypage.com/htmw/htairw/articles/20231230.aspx