[mewzilla]

https://jalopnik.com/cargo-ship-full-of-european-cars-left-to-burn-in-the-at-1848553606

https://www.caranddriver.com/news/a39123584/cargo-ship-porsche-vw-fire-atlantic/

https://www.maritime-executive.com/article/portuguese-navy-launches-effort-to-rescue-crew-of-burning-ro-ro

The last paragraph of that last article is especially interesting.

[texas booster]

In the past, insurers and class societies have voiced concern over the risk of fires on ro-ro vessels. Across all ro/pax and ro/ro classes, reefer truck fires and cargo shifts are among the leading culprits, according to a 2016 study by DNV. Car electrical system fires have also sparked large conflagrations in the past. The cause of the Felicity Ace fire is not currently known.

Another article points out that VW lost a lot of cars on a ro/ro in 2019.

Even if the batteries are most discharged, they are still slightly charged, to quote TPB.