I got an Apollo2 induction heater from DynaVap.
Super solid. I have been using it with this 20k mAh battery pack:
https://www.amazon.com/dp/B07K4SPXTC/ref=cm_sw_r_cp_api_i_sCTCEb941PZ3F
The supplied cables adapt to connect to the IH. It has a real-time power display and it easily supplies 78W...