Was never a fan of spendy rapid PID based mini-heaters, but some people do prefer that design.
In situations where PCB ground pours removed thermal-reliefs for power handling reasons, mini-cartridge-heaters often simply don't have enough thermal mass to heat an area fast enough without the control-loop missing temperature ranges and or time limits.
Anecdotally, same reason good portable butane catalytic iron units are often superior to USB-C/battery operated units.
Note Zinc contact is restricted in some places, and that ban includes zinc-brass sources. Best of luck =3
In situations where PCB ground pours removed thermal-reliefs for power handling reasons, mini-cartridge-heaters often simply don't have enough thermal mass to heat an area fast enough without the control-loop missing temperature ranges and or time limits.
Anecdotally, same reason good portable butane catalytic iron units are often superior to USB-C/battery operated units.
Note Zinc contact is restricted in some places, and that ban includes zinc-brass sources. Best of luck =3