Which battery pack to use?

[kevindelord]

Hello friends,

I have a built a cute little Phoniebox for my daughter using a RaspberryPi 3B+ and a power bank.
Sadly it is very hard to use as both the RPi and the power bank need to be manually turned on.

Therefore I'm looking for a solution to plug-in a battery pack onto the RPi itself, which when pressing a switch button (via GPIO control) would turn on the PI via the battery.
Is that even feasible?

I have the switch button already - and it's working fine, providing the RPi has power.

Searching online I found the Pisugar2 Pro and/or a Battery Pack from AZDelivery.
However I'm not sure if the voltage is enough to power everything (RPi 3B+, speakers, RFID) nor how long it would last (is 3800mAh or 5000mAh enough)?

Thanks in advance for your help and advices!

Kevin

(And obviously thanks for this amazing project!)

[s-martin]

Many people use the OnOffShim.

For instructions see e.g. here https://splittscheid.de/akku-powerbank-einschalter-raspberry-pi/ (Sorry, only German).

[kevindelord]

Ok thanks, looks like it should "wake up" my power bank as well.
I will order one and see how it goes!

[pabera]

Just in case you want to learn more about using it. In English ;-)
https://github.com/MiczFlor/RPi-Jukebox-RFID/blob/future3/develop/documentation/builders/components/power/onoff-shim.md

[kevindelord]

Oh well, thank you.
I have ordered one OnOffShim, have bought a soldering kit for that purpose and have put it all together.
However it looks like I've butchered the "soldering" part and it does not work.

Am I right to assume that all pins should be soldered on the OnOffShim?

Cheers,
Kevin

[kevindelord]

Alright gentlemen,
I started all over again and it works now like a charm.
Soldering ain't easy...
Thanks!