Do you carry other spare parts on long rides apart from battery?

[Ja sa bong]

Normally, it's a very common habit to carry spare battery for your e-bike especially when going on a long ride without being sure of having a spot to charge along the way. But, I wonder if it's only battery that might fail in the e-bike when going on a long journey?

What other spare parts of your e-bike do you carry on long rides?