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Polar CS400 bike computer battery: CR2354

The Polar CS400 bike computer takes one CR2354 3V lithium coin cell.

CR23543V

CR2354× 13V lithium coin cell

Source: Polar CS400 manual

Varta CR2354 at Amazon for CR2354 3V lithium coin cell (affiliate link, opens in new tab)Panasonic CR2354 at Amazon (affiliate link)

Before you swap it

  • Check the old cell's face for its code before you buy. Same code, same size and voltage.

Quick answers

What battery does the Polar CS400 take?

One CR2354 3V lithium coin cell.