I bought a amazon kit - Mesh Node T114 with screen protector & GPS-Modul & 950mAh Akku, nRF52840 MCU SX1262 LoRa-Chip
https://www.amazon.de/dp/B0F65D568Z (non referal)
I modified the muzi.work H2T Remix case by NextGen, so that a Heltec with a screen protector fits inside, and I extended the MuziWorks back cover to make room for a larger battery. I also adapted the pager-style sleeve accordingly to accommodate the new size of the case.
I had to file down the USB port a little so that the reset button wouldn't be pressed during assembly.
The author remixed this model.
I modified the NextGen case so that a Heltec with a screen protector fits inside, and I extended the MuziWorks back cover to make room for a larger battery. I also adapted the pager-style sleeve accordingly to accommodate the new size of the case.