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Philips Hue Dimmer Switch battery: CR2032 or CR2450

It depends on the version: current version (v2) takes one CR2032; original version (v1, separate on and off buttons) takes one CR2450.

current version (v2)

CR20323V

CR2032× 13V lithium coin cell

Also sold as DL2032, ECR2032, KECR2032, 5004LC · CR2032 details

Source: Philips Hue Hue Dimmer Switch spec sheet

Energizer CR2032 4 pack at Amazon for CR2032 3V lithium coin cell (affiliate link, opens in new tab)Varta CR2032 4 pack at Amazon (affiliate link)

original version (v1, separate on and off buttons)

CR24503V

CR2450× 13V lithium coin cell

Also sold as DL2450, 5029LC, KECR2450, CR2450N · CR2450 details

Source: Philips Hue Hue Dimmer Switch support page

Varta CR2450 4 pack at Amazon for CR2450 3V lithium coin cell (affiliate link, opens in new tab)Energizer CR2450 at Amazon (affiliate link)

Before you swap it

  • A CR2032 is 3.2 mm thick. CR2016 and CR2025 look the same from the front, but they aren't the same cell, and a thinner one can rattle or lose contact.

Quick answers

Which battery goes in the Philips Hue Dimmer Switch?

Current version (v2): one CR2032 3V lithium coin cell. original version (v1, separate on and off buttons): one CR2450 3V lithium coin cell.

Is DL2032 the same as CR2032?

Yes. DL2032 is CR2032, and DL2450 is CR2450: same cells, other names.

Will a CR2025 fit instead of a CR2032?

No. It's the same 20 mm width but 2.5 mm thick, against 3.2 mm for a CR2032. Use a CR2032.