Fig. 3From: WATLAS: high-throughput and real-time tracking of many small birds in the Dutch Wadden SeaWATLAS tags and batteries. A tag without battery and coating and a one-euro coin for scale. B 2.4Â g coated tag with CR1620 battery. C a 4.4Â g coated tag with CR2032 battery. The batteries of the tags are shown on the leftBack to article page