i am trying to make a gameboy emulator using retro pi and a pi zero 2 w. for powering the pi itself i have 2 options:

1: a standard tp4056 USB c chrger module.

use of this will only allow me to use the pi until it reaches 3.3 v thus leaving unused power left over in the battery.

2 : another type c charger with adjustable voltage(idk what it is called or how it works) Type-C QC AFC PD2.0 PD3.0 to DC Fast Charge Decoy Trigger Support 5V 9V 12V 15V 20V Fixed Voltage Output - Besomi Electronics

or I can use an adafruit powerboost but that costs $25 3-4X more expensive than the other 2 options.

so I would like to know whether option 2 is viable and can take 3.7v to 5v or should I just use the powerboost.

ps: can I make a 3.7 v battery pack using 3-4 3.7 3800mah batteries and should why be in series or parallel?