Polestar Polestar 3 key fob battery
1 of the 2 model years listed for the Polestar Polestar 3 have a proven battery. The most common answer is No battery. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2025Key card
No battery
Owner's manual: polestar.com (checked Nov 1, 2026)
Manual text: “key cards need to be placed on the driver's door handle”
- 2025Smart key
Rechargeable
Owner's manual: polestar.com (checked Nov 1, 2026)
Manual text: “The key fob includes a non-replaceable battery”
- 2026Key card
Not confirmed yet
- 2026Smart key
Not confirmed yet
Changing the battery
Card or phone key
- The source lists a card or phone key for these years.
- Most NFC key cards are passive and never need a battery.
No battery to replace for these years, per the source shown.
Smart key (push-button start)
- Start by freeing the hidden metal key: there is a latch or slide on the case, and the blade comes out once it moves.
- The gap left by the metal key usually has a pry point. A slow twist with a thin flat tool (tape on the tip saves the plastic) opens the two halves.
- Note which side of the old coin cell faces up (usually the side with the writing), lift it out with a plastic tool, and press the new one in the same way.
- Close the case until it clicks all the way round, put the metal key back, then try the buttons and a push-button start.
The owner's manual says this remote has a rechargeable cell. It charges while the key is in the ignition or the car is driven. There is no coin cell to buy; if it no longer holds a charge, a dealer replaces the remote.
If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.