5 model

Free

DIY 222Wh Powerbank

Thingiverse

Free

DIY Powerbank for 4x18650

Thingiverse

Free

DIY POWERBANK with glarefree lamp

MyMiniFactory

Free

Battery Shield V3 - DIY Powerbank with LiPo 18650

Thingiverse

Free

High-Power 6.5" TWS Bluetooth Speaker - 140W PD Support

Printables