Shipping Container Power Bank with 21700 cell.

DIY Maersk Shipping contaimner powerbank with 21700 cell.

18W PD module in use from aliexpress or similar

https://www.aliexpress.com/item/3256807135744764.html

https://robu.in/product/type-c-usb-5v-2a-step-up-boost-converter-with-usb-charger/

https://robokits.co.in/batteries-chargers/charge-protection-circuit/5v-2a-integrated-module-type-c-input-compatible-with-4.2v-lithium-battery

21700 cells from below

https://robokits.co.in/batteries-chargers/samsung-premium-li-ion-battery/3.7v-samsung-li-ion-batteries/samsung-21700-5000mah-inr21700-50s-45a-9c-li-ion-battery-original

https://robu.in/product/bak-nmc-n21700cd-53e-3-6v-5300mah-2c-li-ion-battery/

Solder the positive and negative of the battery to the module and use super glue to keep the module and roof in place.

Name plate to be printed seperately and stuck in place.