How do I determine how much battery and resistance is required to wire a series of LEDs?
The product summary tells you the typical and max. forward voltage and maximum current.

Multiply typical and max. voltages by no. of LEDs, then choose a power source (battery) with higher voltage than max * no. of LEDs.

Subtract typical voltage * no. of LEDs from battery voltage; this is the voltage you can expect across the resistor.

Divide that voltage by the max. operating current to give you the smallest value of resistance you need. You can increase it to reduce brightness.