Parts

LiPo handling, charging in a fire-safe bag, storage voltage, puffy packs.

KV ratings, sizes, and what fits an antweight versus a beetleweight drivetrain.

Charge rates, balance leads, and the safe storage voltage you should leave packs at.

Brushed vs brushless, current ratings, and matching ESCs to your motor and battery.

Vertical and horizontal spinners — biggest hits, biggest risk.