Is my 2021 etron’s battery made of lead acid or not?

[aloosecannon]

I just had my 2021 etron serviced and got a quick look at the 12v battery. Do you know if it's made of lead acid? I couldn't get a good look at it myself. Just curious to know more about my car's inner workings!

 

[carculturecraz3]

I think that model still uses lead. The latest e-trons I believe use lithium-ion batteries already.