Toyota Prius Plug-in key fob battery
1 of the 4 model years listed for the Toyota Prius Plug-in have a proven battery. The most common answer is CR1632. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2012-2013Unknown
Not confirmed yet
- 2014Smart key (electronic key)
CR1632
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “You will need the following items: Lithium battery CR1632”
Find CR1632 on Amazon - 2015Unknown
Not confirmed yet
Changing the battery
Smart key (push-button start)
- Find the small release on the edge or back of the fob and hold it while you pull out the metal emergency key.
- Look inside the empty key slot for a notch. Put the tip of the metal key or a small flat screwdriver wrapped in tape there and twist gently until the shell splits.
- Before you take the old cell out, look at its face. Put the new cell in with the same side showing, and avoid touching both faces at once.
- Close the case until it clicks all the way round, put the metal key back, then try the buttons and a push-button start.
On most Toyota smart keys the metal key slides out after you press a small release, and the case opens at the slot it leaves behind.
A CR1632 is 16 mm across and 3.2 mm thick. It is easy to confuse with the 20 mm CR20xx sizes, which will not fit.
Keep spare coin cells away from small children. A swallowed coin cell can burn the throat within hours; if it happens, go to an emergency room at once.