10W Fast Charging, Fireflies Patented Magnetic Type-C Port (Patent 2023235776065). Battery – unprotected flat-top 21700 only (not included, use high-drain cells including 50XG, Molicel P42, P45, P50, P60, Ampace JP40, EVE 40PL, BAK 45D, Samsung 40T, 50S, or Vapcell T50).