When you ignite the kerosene heater, approx… 1A of electric current consumption will occur (from ignition heater and ignition device). Compared to alkaline, manganese battery tends to decrease the voltage if the temperature is low, which may cause ignition failure because necessary current for ignition cannot be acquired despite enough battery capacities. Also, alkaline and manganese cannot be used at the same time. It may cause the leakage of battery