1.5v 1 battery 4 how to splice into a battery pack?
Generally this kind of small lamp is best to use rheostat, can adjust the value of voltage current at any time.
First calculate the power and current through this resistor to derive the actual power, and then buy a power factor of 1 ohm higher than the actual power you calculate.
Generally with sliding resistance, because it can be adjusted at any time, and 1.5v battery 4 section may not be stable is 6V.
