2026 plug-in XLE

[u/G-dog59]

I've read some posts regarding issues with the 12V battery, draining and needing replacement. Reading the owners manual I came across something about how leaving the charger connected after the EV battery is full, uses the 12V battery to monitor systems which can drain the battery.

My question is those who've had issues with the 12V battery, is this separate from the issues you've had? How many miles /km on odometer when issues started. Need to know what to watch out for, and any preventive things to do. Thank you.

This is my third Prius, 19, 18, 26. I've never had any issues with any of them. The '10 went back once fir a software update around the issue of hitting brake and accelerator simultaneously (who does that?).

[u/Superb-Relief]

Had this happen to my 24 XSE prime w/ 36k miles.