The remote key of an EcoSport (across all variants) uses the battery designated as CR2032: C refers to the battery chemistry (lithium type), R refers to the shape (round), 20 and 32 refer to the dimensions (20 mm in diameter, 3.2 mm in thickness).

To watch a video on how to replace the battery of the remote key, head directly to Replacing Remote Key’s Battery.
Related link:
EcoSport’s Transponder Key
Opening the Rear Door using the Remote
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ECOSPORT DIY SERIES
Isa na namang kaalaman sa ating minamahal na EcoSport
© Anthony Urbano (Manila, Philippines)