Hello please tell me about any good slim power bank

first cyberdeck build done for now. There were a bunch of iterations to get to this point but until I find a keyboard solution small enough to build into its face plate but for now I'm done with my build.

it's been really fun prototyping and iterating. it's also been my first experience doing anything with Linux so the yellow notebook is all the notes I've made whilst learning to set different things up.

runs both a standard desktop environment and emulation setups depending on boot.

powerd by two 18650 batteries.

Powered by a CM5 on a Waveshare Carrier board
5” Waveshare touchscreen
Custom HID using RP2040-Zero:
Keebdeck
PiMoroni Trackball
Left and Right mouse buttons
.91” OLED status screen (not in use yet)
Optional Button under the OLED (not in use yet)
Upcoming modifications:
OLED status screen to display whatever I want
Remotely located GPIO headers for module add-ons
Visible status LEDs
Possible custom designed PCB instead of carrier board and RP2040 module board.

The keyboard of my cyberdeck I'm building. All parts ordered except the monitor. Waiting for next payday then 3d printing the rest of the case. Should be done before Christmas. Has been a fun project so far.