raspberrypi VS little-sun-gazer

I bought one of these https://www.amazon.com/gp/product/B091F7YSCD/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 to play around. Found it convenient initially but the lack of an on-board reset button was annoying. Found this on YT https://www.youtube.com/watch?v=XRq9Gs6X2Dk after which I eventually made my own using Kicad (there are plenty of freely available Pico footprints on Github such as this https://github.com/ncarandini/KiCad-RP-Pico or https://github.com/MKme/raspberrypi ) and got it made from a three-letter-name PCB company from you know where. The breakout board in the first link has m2 size mounting holes so you can secure it on a larger mounting board or inside a 3d printed case.

Depends on how you configure you Pico. I.e. this project consumes around 17mA idling while using CircuitPython's light sleep, which is quite a lot. One of my other battery powered projects uses 2.3mA as I was able to tap in Pico's deep sleep mode from C https://github.com/dr-mod/little-sun-gazer

As for the bigger battery, yes the duck has room for a battery with more capacity. But I'd say the way to improve the ducks longevity would be to tap into the other Picos power saving modes that I wasn't able to achieve with CircuitPython. I was able to achieve 2.3 mA in deep sleep mode for my Little Sun Gazer Project https://github.com/dr-mod/little-sun-gazer , but it's written in C.

Software: https://github.com/dr-mod/little-sun-gazer