Jeremy Gillick’s Thunder Pack was designed around an STM32 MCU and features an onboard battery, USB, charger, buttons, and status LEDs.
![](https://hackster.imgix.net/uploads/attachments/1093986/thunder-pack-arm-board_9V1gqAVaPM.jpg?auto=compress%2Cformat&w=830&h=466.875&fit=min&dpr=1)
Jeremy Gillick’s Thunder Pack was designed around an STM32 MCU and features an onboard battery, USB, charger, buttons, and status LEDs.