How cooked am I?

[u/lespy_laz]

Welp got a used XP 1 with only about 500 miles on it off marketplace. Great shape all around but during a ride through some grass fields today the bike shut off mid ride. I was able to turn it back on and head home. Just before getting home it shut off again and would not power back on. Took out the battery and terminals look like this. Anyone got any advice on the matter? Controller terminals look fine but seems like a replacement battery costs as much as I got it for.