Toyota Prius v key fob battery
4 of the 6 model years listed for the Toyota Prius v 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.
- 2012Smart key (electronic key)
CR1632
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Use a CR1632 lithium battery”
Find CR1632 on Amazon - 2013Unknown
Not confirmed yet
- 2014Unknown
Not confirmed yet
- 2015Smart 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 - 2016-2017Smart key
CR2032
FCC ID HYQ14FBATwo sites agree: energizer.com and uhs-hardware.com (checked Nov 1, 2026)
Find CR2032 on Amazon
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.
- 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.
- Pop the old battery out with a toothpick or plastic pick, not a metal blade, and seat the new one with the + side matching the old one.
- Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.
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.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.